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| author | William Joye <wjoye@cfa.harvard.edu> | 2018-12-21 16:51:26 (GMT) |
|---|---|---|
| committer | William Joye <wjoye@cfa.harvard.edu> | 2018-12-21 16:51:26 (GMT) |
| commit | dbd067d96dff4739d516c0bc6d048f60c655c771 (patch) | |
| tree | 1e62e2465b35e527aeebdd39fff32e08da2b3246 /ds9/doc | |
| parent | 21ae37c5a9db158c6c4d54a0fa75b8e0b526ebed (diff) | |
| download | blt-dbd067d96dff4739d516c0bc6d048f60c655c771.zip blt-dbd067d96dff4739d516c0bc6d048f60c655c771.tar.gz blt-dbd067d96dff4739d516c0bc6d048f60c655c771.tar.bz2 | |
fix doc link
Diffstat (limited to 'ds9/doc')
| -rw-r--r-- | ds9/doc/ref/file.html | 1464 |
1 files changed, 789 insertions, 675 deletions
diff --git a/ds9/doc/ref/file.html b/ds9/doc/ref/file.html index b1aebc8..012bcf0 100644 --- a/ds9/doc/ref/file.html +++ b/ds9/doc/ref/file.html @@ -1,682 +1,796 @@ <!DOCTYPE doctype PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> -<head> -<meta name="generator" content= -"HTML Tidy for Mac OS X (vers 31 October 2006 - Apple Inc. build 15.18.1), see www.w3.org"> -<meta http-equiv="Content-Type" content= -"text/html; charset=us-ascii"> -<meta name="GENERATOR" content= -"Mozilla/4.78 [en] (X11; U; Linux 2.4.7-10 i686) [Netscape]"> -<title>File Formats</title> -</head> -<body link="#0000EE" alink="#FF0000" bgcolor="#FFFFFF" text= -"#000000" vlink="#551A8B"> -<h3><img alt="" src="../sun.gif" height="98" align="middle" width= -"100"> File Formats</h3> -<blockquote><a href="#FITS">FITS</a><br> -<a href="#FITSImage">FITS Image</a><br> -<a href="#FITSBinaryEventsTable">FITS Binary Events Table</a><br> -<a href="#FITSHEALPIXTable">FITS HEALPIX Table</a><br> -<a href="#FITSDataCube">FITS Data Cube</a><br> -<a href="#FITSMultipleExtensionDataCube">FITS Multiple Extension -Data Cube</a><br> -<a href="#FITSMultipleExtensionMultipleFrames">FITS Multiple -Extension Multiple Frames</a><br> -<a href="#FITSMosaic">FITS Mosaic</a><br> -<a href="#FITSMosaicDataCube">FITS Mosaic Data Cube</a><br> -<a href="#FITSRGB">FITS RGB</a><br> -<a href="#SplitFITS">Split FITS</a><br> -<a href="#array">Array</a><br> -<a href= -"file:///Users/joye/saods9/doc/ref/file.html#nrrd">NRRD</a><br> -<a href="#envi">ENVI</a><br> -<a href="#gif">GIF</a><br> -<a href="#tiff">TIFF</a><br> -<a href="#jpeg">JPEG</a><br> -<a href="#png">PNG</a><br> -<a href="#ExternalFileSupport">External Format Support</a><br> -<a href="#ExternalAnalysisSupport">External Analysis -Support</a><br> -<a href="#RegionFiles">Region Files</a><br> -<a href="#ContourFiles">Contour Files</a><br> -<a href="#ColorLookupTable">Color Lookup Table</a><br> -<a href="#WCS">WCS</a><br> -<a href="#PreferenceFile">Preference File</a><br> -<a href="#StartupFile">Startup File</a><br> -<a href="#TCL">TCL</a><br> -<p><b><a name="FITS" id="FITS"></a>FITS</b></p> -DS9 supports FITS images and FITS binary tables. The following -algorithm is used to locate and to load the FITS image or table if -no additional information is provide: -<blockquote> -<ul> -<li><tt>Examine primary HDU, if IMAGE, load.<br></tt></li> -<li><tt>Examine each extension HDU</tt></li> -<li style="list-style: none"> -<ul> -<li><tt>If IMAGE, load.<br></tt></li> -<li><tt>If BINARY TABLE, create IMAGE if the following is -true:</tt></li> -<li style="list-style: none"> -<ul> -<li><tt>FITS COMPRESSED: keyword ZIMAGE is T.</tt></li> -<li><tt>FITS EVENTS: keyword EXTNAME is EVENTS,STDEVT, or RAYEVENT, -column names X and Y are present.</tt></li> -<li><tt>FITS HEALPIX: keyword PIXTYPE is HEALPIX.</tt><br></li> -</ul> -</li> -</ul> -</li> -<li><tt>If DS9 traverses the entire FITS file without satisfying -one of the above, an error is generated.</tt></li> -</ul> -</blockquote> -FITS keyword inheritance is supported. All valid FITS -<tt>BITPIX</tt> values are supported, along with <tt>-16,</tt> for -<tt>UNSIGNED SHORT</tt>. The following FITS keywords are supported: -<blockquote><tt>OBJECT<br> -UNITS<br> -BSCALE / BZERO<br> -BLANK<br> -DATASEC<br> -LTV / LTM for physical coords<br> -DTV / DTM for detector coords<br> -ATV / ATM for amplifier coords<br> -WCS keywords<br> -WCS# keywords</tt></blockquote> -<p><b><a name="FITSImage" id="FITSImage"></a>FITS Image</b></p> -At load time, the user may provide just a file name or a file name -along with FITS extension name/number and image section -specification. FITS extension names are case insensitive. When -specifying an extension, be sure to quote strings correctly to pass -both the shell and DS9 parser. A image section specification is -used to specify the x,y limits of an image subsection. By default, -x and y coordinates are in <tt>IMAGE</tt>, use a <tt>'p'</tt> as -the last character to indicate <tt>PHYSICAL</tt> coordinates. A -<tt>'*'</tt> indicates use the default for that axis only. Block is -optional and defaults to 1.<br> -<blockquote><tt>Syntax:<br> -filename<br> -filename[ext]<br> -filename[ext][sect]<br> -filename[sect]<br> -filename[ext,sect]<br> -<br> -where</tt><tt><br> -<br> -ext:<br> -[extension name | extension #]<br> -<br> -sect:<br> -[x0:x1</tt><tt>,y0:y1[p]]<br></tt> -<tt><tt><tt>[x0:x1</tt></tt></tt><tt><tt><tt>,y0:y1</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt> -[x0:x1</tt></tt><tt><tt>,y0:y1</tt></tt><tt><tt>,z0:z1</tt></tt><tt><tt><tt>[p]</tt>]<br> -</tt></tt> -<tt><tt><tt>[x0:x1</tt></tt></tt><tt><tt><tt>,y0:y1</tt></tt></tt><tt><tt><tt>,block,z0:z1</tt></tt></tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt><br> - -<tt><tt><tt>[*,y0:y1</tt></tt></tt><tt><tt><tt><tt>[p]</tt>]<br></tt> -<tt><tt><tt>[*,y0:y1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt> -[*,y0:y1</tt></tt></tt></tt><tt><tt><tt><tt>,z0:z1</tt></tt></tt></tt><tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt></tt> -<tt><tt><tt>[*,y0:y1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt>,block,z0:z1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt></tt></tt><br> - -<tt><tt><tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt>,*</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt> -<tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>,*</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt> -[x0:x1</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>,*,z0:z1</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> -</tt></tt> -<tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>,*,block,z0:z1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt></tt></tt></tt></tt><br> - -<tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[*,*</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]<br> -</tt> -[*,*,z0:z1</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]<br> -</tt></tt> -<tt><tt><tt>[*,*,block,z0:z1</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]</tt></tt></tt><br> - -<br></tt></tt></tt></tt></tt></tt> -[dim1@xcen,dim2@ycen</tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -<tt><tt><tt><tt><tt><tt>[dim1@xcen,dim2@ycen,block</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -[dim1@xcen,dim2@ycen,dim3@zcen</tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt></tt></tt> -<tt><tt><tt><tt><tt><tt>[dim1@xcen,dim2@ycen,block,dim3@zcen</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt><br> - -<tt><tt><tt><tt>[*,dim2@ycen</tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -<tt><tt><tt><tt><tt><tt>[*,dim2@ycen,block</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -[*,dim2@ycen,dim3@zcen</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt></tt></tt> -<tt><tt><tt><tt><tt><tt>[*,dim2@ycen,block,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt></tt></tt><br> - -<tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[dim1@xcen,*</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -<tt><tt><tt><tt><tt><tt>[dim1@xcen,*,block</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt> -[dim1@xcen,*,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> -</tt></tt></tt></tt> -<tt><tt><tt><tt><tt><tt>[dim1@xcen,*,block,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><br> - -<tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[*,*,block]<br> -</tt></tt> [*,*,dim3@zcen]<br></tt></tt></tt></tt> -<tt><tt><tt><tt><tt><tt>[*,*,block,dim3@zcen]</tt></tt></tt></tt></tt></tt><br> - -<br></tt></tt></tt></tt></tt></tt></tt></tt> -<tt><tt><tt><tt>[dim@xcen@ycen]</tt></tt><tt><tt><br></tt></tt> -[dim@xcen@ycen,block]</tt></tt><br> -<tt><tt><tt><tt>[dim@xcen@ycen,zdim@zcen]</tt></tt></tt></tt><br> -<tt><tt><tt><tt><tt><tt><tt><tt>[dim@xcen@ycen,block,zdim@zcen]</tt></tt></tt></tt></tt></tt></tt></tt><tt><br> - -<br> -Example:<br> -$ds9 foo.fits # default load<br> -$ds9 foo.fits[1] # load first extension<br> -$ds9 foo.fits[BCKGRD] # load extension named 'BCKGRD'<br> -$ds9 foo.fits[10:200,40:100] # image section<br></tt> <tt><tt>$ds9 -foo.fits[10:200,40:100,2] # image section, blocked by 2<br></tt> -$ds9 foo.fits[*,40:100] # only section y axis<br> -$ds9 foo.fits[256@512@512] # section box at 512,512<br> -$ds9 foo.fits[2][100:200,100:200] # second extension, image -section<br></tt> <tt><tt>$ds9 foo.fits[2][100:200,100:200,2] # -second extension, image section, blocked by 2<br></tt> $ds9 -foo.fits[10:200,40:100,5:20] # cube section<br> -$ds9 foo.fits[*,40:100,5:20] # only section y and z axes<br> -$ds9 foo.fits[256@512@512] # section cube at 512,512<br> -$ds9 foo.fits[2][100:200,100:200,5:20] # second extension, cube -section</tt><br> -<tt>$ds9 foo.fits[2][100:200,100:200,2,5:20] # second extension, -cube section, blocked by 2</tt></blockquote> -<b><a name="FITSBinaryEventsTable" id= -"FITSBinaryEventsTable"></a>FITS Binary Events Table<br> -<br></b> At load time, the user may provide just a file name or a -file name along with FITS extension name/number, image section -specification, and binnng parameters. DS9 will automatically -convert an FITS binary events table into a 2D image for display. -FITS extension names and parameters are case insensitive. The users -may specify a number of parameters on how to construct the image -and how to filter data. When specifying a filter, be sure to quote -strings correctly to pass both the shell and DS9 -parser.</blockquote> -<blockquote> -<blockquote><tt><tt><tt><tt>Syntax:<br></tt></tt></tt></tt> -<tt><tt>filename<br> -filename[ext]<br> -filename[ext][sect]<br> -filename[sect]<br> -filename[ext,sect]<br></tt><br> -filename[ext][bin]<br></tt> -<tt><tt><tt><tt><tt>filename[ext][bin][sect]<br></tt></tt></tt></tt> -filename[ext][sect][bin]<br></tt> -<tt><tt><tt><tt>filename[bin]<br></tt></tt></tt> -filename[bin][sect]<br></tt> -<tt><tt>filename[sect][bin]<br></tt></tt> <tt>filename[ext,bin]<br> -<br></tt> <tt>where:<br> -ext: see <a href="FITSImage">FITS Image</a><br> -sect: see <a href="FITSImage">FITS Image</a><br> -<br> -bin:<br> -[bin=colx,coly] # bin counts<br></tt> -<tt><tt>[bin=colx,coly,filter] # bin counts with filter<br></tt> -[bin=colx,coly,colz] # bin on colz<br></tt> -<tt><tt>[bin=colx,coly,colz,filter] # bin on colz with -filter<br></tt></tt> <tt><tt>[bin=colz] # bin cols 'x', 'y', and -colz<br></tt></tt> <tt><tt>[bin=colz,filter] # bin cols 'x', 'y', -and colz with filter<br></tt> [key=colx,coly]<br> -[binkey=colx,coly]<br></tt><br> -(see <a href= -"http://hea-www.harvard.edu/saord/funtools/filters.html">Introduction -to Filtering</a>)<br> -<br> -<tt>Example:</tt><br> -<tt>$ds9 foo.fits # default load</tt><br> -<tt>$ds9 foo.fits[1] # load first extension</tt><br> -<tt>$ds9 foo.fits[BCKGRD] # load extension named 'BCKGRD'</tt><br> -<tt>$ds9 foo.fits[bin=detx,dety] # bin on detx,dety</tt><br> -<tt>$ds9 foo.fits[2][bin=rawx,rawy] # load ext 2, cols -rawx,rawy</tt><br> -<tt>$ds9 foo.fits[bg_events,bin=rawx,rawy] # load ext bg_events, -cols rawx,rawy</tt><br> -<tt>$ds9 foo.fits[bin=x,y,pha] # bin on x,y,pi</tt><br> -<tt>$ds9 foo.fits[bin=pi] # bin on x,y,pi</tt><br> -<tt>$ds9 'foo.fits[ccd_id==3&&energy>4000]' # quoted -filter</tt><br> -<tt>$ds9 '"foo.fits[ccd_id==3 && energy>4000]"' # double -quoted filter</tt><br> -<tt>$ds9 'foo.fits[events][pha>5,pi<2]' # load extension -'events' and filter</tt></blockquote> -</blockquote> -<blockquote> -<p>The shell environment variable <tt>DS9_BINKEY</tt> may be used -to specify default bin cols for FITS bin tables. Example:</p> -<blockquote><tt>$ export DS9_BINKEY='[bin=rawx,rawy]'</tt><br> -<tt>$ ds9 foo.fits # load FITS bin table, bin on rawx, -rawy<br></tt></blockquote> -<p><b><a name="FITSHEALPIXTable" id="FITSHEALPIXTable"></a>FITS -HEALPIX Table<br></b></p> -At load time, the user may provide just a file name or a file name -along with FITS extension name/number, image section specification, -and Healpix parameters. DS9 will automatically convert a FITS -HEALPIX binary or ascii table into a 2D image for display. FITS -extension names and parameters are case insensitive. The users may -specify a number of parameters on how to construct the image. Any -table with keyword PIXTYPE=HEALPIX or NSIDE=x will be processed as -an HEALPIX image. The following FITS keywords will be used if -present and not overwritten by a command line option: NSIDE, -COORDSYS, ORDER.<br> -<blockquote><tt><tt><tt><tt>Syntax:<br></tt></tt></tt></tt> -<tt><tt>filename<br> -filename[ext]<br> -filename[ext][sect]<br> -filename[sect]<br> -filename[ext,sect]<br> -<br></tt></tt> <tt><tt><tt>filename[ext][hpx]<br></tt> -<tt><tt><tt><tt><tt>filename[ext][hpx][sect]<br></tt></tt></tt></tt> -filename[ext][sect][hpx]<br></tt> -<tt><tt><tt><tt>filename[hpx]<br></tt></tt></tt> -filename[hpx][sect]<br></tt> -<tt><tt>filename[sect][hpx]<br></tt></tt> <tt>filename[ext,hpx]<br> -<br></tt> where:<br></tt></tt> <tt><tt><tt><tt><tt><tt><tt>ext: see -<a href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS -Image</a><br></tt></tt></tt></tt></tt> sect: see <a href= -"file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS -Image</a><br> -<br> -hpx:<br></tt></tt> <tt>[order=ring|nested] # default ring<br> -[layout=equatorial|north|south] # default equatorial<br> -[col=<column number>] # defaut 1<br> -[quad=<quadurant number>] # (1-4) default 1<br> -[system=equatorial|galactic|ecliptic|unknown] # default -unknown</tt><br> -<br> -<tt>Example:</tt> <tt><br> -$ds9 foo.fits # default load</tt> <tt><br> -$ds9 foo.fits[1] # load first extension</tt> <tt><br> -$ds9 + <head> + <meta name="generator" content="HTML Tidy for Mac OS X (vers 31 + October 2006 - Apple Inc. build 15.18.1), see www.w3.org"> + <meta http-equiv="Content-Type" content="text/html; + charset=windows-1252"> + <meta name="GENERATOR" content="Mozilla/4.78 [en] (X11; U; Linux + 2.4.7-10 i686) [Netscape]"> + <title>File Formats</title> + </head> + <body text="#000000" vlink="#551A8B" bgcolor="#FFFFFF" alink="#FF0000" + link="#0000EE"> + <h3><img alt="" src="../sun.gif" width="100" align="middle" + height="98"> File Formats</h3> + <blockquote><a href="#FITS">FITS</a><br> + <a href="#FITSImage">FITS Image</a><br> + <a href="#FITSBinaryEventsTable">FITS Binary Events Table</a><br> + <a href="#FITSHEALPIXTable">FITS HEALPIX Table</a><br> + <a href="#FITSDataCube">FITS Data Cube</a><br> + <a href="#FITSMultipleExtensionDataCube">FITS Multiple Extension + Data Cube</a><br> + <a href="#FITSMultipleExtensionMultipleFrames">FITS Multiple + Extension Multiple Frames</a><br> + <a href="#FITSMosaic">FITS Mosaic</a><br> + <a href="#FITSMosaicDataCube">FITS Mosaic Data Cube</a><br> + <a href="#FITSRGB">FITS RGB</a><br> + <a href="#SplitFITS">Split FITS</a><br> + <a href="#array">Array</a><br> + <a href="file:///Users/joye/saods9/doc/ref/file.html#nrrd">NRRD</a><br> + <a href="#envi">ENVI</a><br> + <a href="#gif">GIF</a><br> + <a href="#tiff">TIFF</a><br> + <a href="#jpeg">JPEG</a><br> + <a href="#png">PNG</a><br> + <a href="#ExternalFileSupport">External Format Support</a><br> + <a href="#ExternalAnalysisSupport">External Analysis + Support</a><br> + <a href="#RegionFiles">Region Files</a><br> + <a href="#ContourFiles">Contour Files</a><br> + <a href="#ColorLookupTable">Color Lookup Table</a><br> + <a href="#WCS">WCS</a><br> + <a href="#PreferenceFile">Preference File</a><br> + <a href="#StartupFile">Startup File</a><br> + <a href="#TCL">TCL</a><br> + <p><b><a name="FITS" id="FITS"></a>FITS</b></p> + DS9 supports FITS images and FITS binary tables. The following + algorithm is used to locate and to load the FITS image or table if + no additional information is provide: + <blockquote> + <ul> + <li><tt>Examine primary HDU, if IMAGE, load.<br> + </tt></li> + <li><tt>Examine each extension HDU</tt></li> + <li style="list-style: none"> + <ul> + <li><tt>If IMAGE, load.<br> + </tt></li> + <li><tt>If BINARY TABLE, create IMAGE if the following is + true:</tt></li> + <li style="list-style: none"> + <ul> + <li><tt>FITS COMPRESSED: keyword ZIMAGE is T.</tt></li> + <li><tt>FITS EVENTS: keyword EXTNAME is EVENTS,STDEVT, + or RAYEVENT, + column names X and Y are present.</tt></li> + <li><tt>FITS HEALPIX: keyword PIXTYPE is HEALPIX.</tt><br> + </li> + </ul> + </li> + </ul> + </li> + <li><tt>If DS9 traverses the entire FITS file without + satisfying + one of the above, an error is generated.</tt></li> + </ul> + </blockquote> + FITS keyword inheritance is supported. All valid FITS + <tt>BITPIX</tt> values are supported, along with <tt>-16,</tt> + for + <tt>UNSIGNED SHORT</tt>. The following FITS keywords are + supported: + <blockquote><tt>OBJECT<br> + UNITS<br> + BSCALE / BZERO<br> + BLANK<br> + DATASEC<br> + LTV / LTM for physical coords<br> + DTV / DTM for detector coords<br> + ATV / ATM for amplifier coords<br> + WCS keywords<br> + WCS# keywords</tt></blockquote> + <p><b><a name="FITSImage" id="FITSImage"></a>FITS Image</b></p> + At load time, the user may provide just a file name or a file name + along with FITS extension name/number and image section + specification. FITS extension names are case insensitive. When + specifying an extension, be sure to quote strings correctly to + pass + both the shell and DS9 parser. A image section specification is + used to specify the x,y limits of an image subsection. By default, + x and y coordinates are in <tt>IMAGE</tt>, use a <tt>'p'</tt> as + the last character to indicate <tt>PHYSICAL</tt> coordinates. A + <tt>'*'</tt> indicates use the default for that axis only. Block + is + optional and defaults to 1.<br> + <blockquote><tt>Syntax:<br> + filename<br> + filename[ext]<br> + filename[ext][sect]<br> + filename[sect]<br> + filename[ext,sect]<br> + <br> + where</tt><tt><br> + <br> + ext:<br> + [extension name | extension #]<br> + <br> + sect:<br> + [x0:x1</tt><tt>,y0:y1[p]]<br> + </tt> + <tt><tt><tt>[x0:x1</tt></tt></tt><tt><tt><tt>,y0:y1</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt> + [x0:x1</tt></tt><tt><tt>,y0:y1</tt></tt><tt><tt>,z0:z1</tt></tt><tt><tt><tt>[p]</tt>]<br> + </tt></tt> + <tt><tt><tt>[x0:x1</tt></tt></tt><tt><tt><tt>,y0:y1</tt></tt></tt><tt><tt><tt>,block,z0:z1</tt></tt></tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt><br> + <tt><tt><tt>[*,y0:y1</tt></tt></tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt> + <tt><tt><tt>[*,y0:y1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt> + [*,y0:y1</tt></tt></tt></tt><tt><tt><tt><tt>,z0:z1</tt></tt></tt></tt><tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt></tt> + <tt><tt><tt>[*,y0:y1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt>,block,z0:z1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt>,*</tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt> + <tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>,*</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt> + [x0:x1</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt>,*,z0:z1</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]<br> + </tt></tt> + <tt><tt><tt>[x0:x1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt>,*,block,z0:z1</tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt>]</tt></tt></tt></tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[*,*</tt></tt></tt><tt><tt><tt><tt>,block</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]<br> + </tt> + [*,*,z0:z1</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]<br> + </tt></tt> + <tt><tt><tt>[*,*,block,z0:z1</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>]</tt></tt></tt><br> + <br> + </tt></tt></tt></tt></tt></tt> + [dim1@xcen,dim2@ycen</tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + <tt><tt><tt><tt><tt><tt>[dim1@xcen,dim2@ycen,block</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + [dim1@xcen,dim2@ycen,dim3@zcen</tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt></tt></tt> + <tt><tt><tt><tt><tt><tt>[dim1@xcen,dim2@ycen,block,dim3@zcen</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt><br> + <tt><tt><tt><tt>[*,dim2@ycen</tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + <tt><tt><tt><tt><tt><tt>[*,dim2@ycen,block</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + [*,dim2@ycen,dim3@zcen</tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt></tt></tt> + <tt><tt><tt><tt><tt><tt>[*,dim2@ycen,block,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[dim1@xcen,*</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + <tt><tt><tt><tt><tt><tt>[dim1@xcen,*,block</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt> + [dim1@xcen,*,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]<br> + </tt></tt></tt></tt> + <tt><tt><tt><tt><tt><tt>[dim1@xcen,*,block,dim3@zcen</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[p]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt>]</tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt><tt>[*,*,block]<br> + </tt></tt> [*,*,dim3@zcen]<br> + </tt></tt></tt></tt> + <tt><tt><tt><tt><tt><tt>[*,*,block,dim3@zcen]</tt></tt></tt></tt></tt></tt><br> + <br> + </tt></tt></tt></tt></tt></tt></tt></tt> + <tt><tt><tt><tt>[dim@xcen@ycen]</tt></tt><tt><tt><br> + </tt></tt> + [dim@xcen@ycen,block]</tt></tt><br> + <tt><tt><tt><tt>[dim@xcen@ycen,zdim@zcen]</tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt><tt><tt>[dim@xcen@ycen,block,zdim@zcen]</tt></tt></tt></tt></tt></tt></tt></tt><tt><br> + <br> + Example:<br> + $ds9 foo.fits # default load<br> + $ds9 foo.fits[1] # load first extension<br> + $ds9 foo.fits[BCKGRD] # load extension named 'BCKGRD'<br> + $ds9 foo.fits[10:200,40:100] # image section<br> + </tt> <tt><tt>$ds9 + foo.fits[10:200,40:100,2] # image section, blocked by 2<br> + </tt> + $ds9 foo.fits[*,40:100] # only section y axis<br> + $ds9 foo.fits[256@512@512] # section box at 512,512<br> + $ds9 foo.fits[2][100:200,100:200] # second extension, image + section<br> + </tt> <tt><tt>$ds9 foo.fits[2][100:200,100:200,2] # + second extension, image section, blocked by 2<br> + </tt> $ds9 + foo.fits[10:200,40:100,5:20] # cube section<br> + $ds9 foo.fits[*,40:100,5:20] # only section y and z axes<br> + $ds9 foo.fits[256@512@512] # section cube at 512,512<br> + $ds9 foo.fits[2][100:200,100:200,5:20] # second extension, + cube + section</tt><br> + <tt>$ds9 foo.fits[2][100:200,100:200,2,5:20] # second extension, + cube section, blocked by 2</tt></blockquote> + <b><a name="FITSBinaryEventsTable" id="FITSBinaryEventsTable"></a>FITS + Binary Events Table<br> + <br> + </b> At load time, the user may provide just a file name or a + file name along with FITS extension name/number, image section + specification, and binnng parameters. DS9 will automatically + convert an FITS binary events table into a 2D image for display. + FITS extension names and parameters are case insensitive. The + users + may specify a number of parameters on how to construct the image + and how to filter data. When specifying a filter, be sure to quote + strings correctly to pass both the shell and DS9 + parser.</blockquote> + <blockquote> + <blockquote><tt><tt><tt><tt>Syntax:<br> + </tt></tt></tt></tt> + <tt><tt>filename<br> + filename[ext]<br> + filename[ext][sect]<br> + filename[sect]<br> + filename[ext,sect]<br> + </tt><br> + filename[ext][bin]<br> + </tt> + <tt><tt><tt><tt><tt>filename[ext][bin][sect]<br> + </tt></tt></tt></tt> + filename[ext][sect][bin]<br> + </tt> + <tt><tt><tt><tt>filename[bin]<br> + </tt></tt></tt> + filename[bin][sect]<br> + </tt> + <tt><tt>filename[sect][bin]<br> + </tt></tt> <tt>filename[ext,bin]<br> + <br> + </tt> <tt>where:<br> + ext: see <a href="FITSImage">FITS Image</a><br> + sect: see <a href="FITSImage">FITS Image</a><br> + <br> + bin:<br> + [bin=colx,coly] # bin counts<br> + </tt> + <tt><tt>[bin=colx,coly,filter] # bin counts with filter<br> + </tt> + [bin=colx,coly,colz] # bin on colz<br> + </tt> + <tt><tt>[bin=colx,coly,colz,filter] # bin on colz with + filter<br> + </tt></tt> <tt><tt>[bin=colz] # bin cols 'x', 'y', and + colz<br> + </tt></tt> <tt><tt>[bin=colz,filter] # bin cols 'x', 'y', + and colz with filter<br> + </tt> [key=colx,coly]<br> + [binkey=colx,coly]<br> + </tt><br> + (see <a + href="http://hea-www.harvard.edu/saord/funtools/filters.html">Introduction +to + Filtering</a>)<br> + <br> + <tt>Example:</tt><br> + <tt>$ds9 foo.fits # default load</tt><br> + <tt>$ds9 foo.fits[1] # load first extension</tt><br> + <tt>$ds9 foo.fits[BCKGRD] # load extension named 'BCKGRD'</tt><br> + <tt>$ds9 foo.fits[bin=detx,dety] # bin on detx,dety</tt><br> + <tt>$ds9 foo.fits[2][bin=rawx,rawy] # load ext 2, cols + rawx,rawy</tt><br> + <tt>$ds9 foo.fits[bg_events,bin=rawx,rawy] # load ext bg_events, + cols rawx,rawy</tt><br> + <tt>$ds9 foo.fits[bin=x,y,pha] # bin on x,y,pi</tt><br> + <tt>$ds9 foo.fits[bin=pi] # bin on x,y,pi</tt><br> + <tt>$ds9 'foo.fits[ccd_id==3&&energy>4000]' # quoted + filter</tt><br> + <tt>$ds9 '"foo.fits[ccd_id==3 && energy>4000]"' # + double + quoted filter</tt><br> + <tt>$ds9 'foo.fits[events][pha>5,pi<2]' # load extension + 'events' and filter</tt></blockquote> + </blockquote> + <blockquote> + <p>The shell environment variable <tt>DS9_BINKEY</tt> may be used + to specify default bin cols for FITS bin tables. Example:</p> + <blockquote><tt>$ export DS9_BINKEY='[bin=rawx,rawy]'</tt><br> + <tt>$ ds9 foo.fits # load FITS bin table, bin on rawx, + rawy<br> + </tt></blockquote> + <p><b><a name="FITSHEALPIXTable" id="FITSHEALPIXTable"></a>FITS + HEALPIX Table<br> + </b></p> + At load time, the user may provide just a file name or a file name + along with FITS extension name/number, image section + specification, + and Healpix parameters. DS9 will automatically convert a FITS + HEALPIX binary or ascii table into a 2D image for display. FITS + extension names and parameters are case insensitive. The users may + specify a number of parameters on how to construct the image. Any + table with keyword PIXTYPE=HEALPIX or NSIDE=x will be processed as + an HEALPIX image. The following FITS keywords will be used if + present and not overwritten by a command line option: NSIDE, + COORDSYS, ORDER.<br> + <blockquote><tt><tt><tt><tt>Syntax:<br> + </tt></tt></tt></tt> + <tt><tt>filename<br> + filename[ext]<br> + filename[ext][sect]<br> + filename[sect]<br> + filename[ext,sect]<br> + <br> + </tt></tt> <tt><tt><tt>filename[ext][hpx]<br> + </tt> + <tt><tt><tt><tt><tt>filename[ext][hpx][sect]<br> + </tt></tt></tt></tt> + filename[ext][sect][hpx]<br> + </tt> + <tt><tt><tt><tt>filename[hpx]<br> + </tt></tt></tt> + filename[hpx][sect]<br> + </tt> + <tt><tt>filename[sect][hpx]<br> + </tt></tt> <tt>filename[ext,hpx]<br> + <br> + </tt> where:<br> + </tt></tt> <tt><tt><tt><tt><tt><tt><tt>ext: see + <a + href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS + Image</a><br> + </tt></tt></tt></tt></tt> sect: see <a + href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS + Image</a><br> + <br> + hpx:<br> + </tt></tt> <tt>[order=ring|nested] # default ring<br> + [layout=equatorial|north|south] # default equatorial<br> + [col=<column number>] # defaut 1<br> + [quad=<quadurant number>] # (1-4) default 1<br> + [system=equatorial|galactic|ecliptic|unknown] # default + unknown</tt><br> + <br> + <tt>Example:</tt> <tt><br> + $ds9 foo.fits # default load</tt> <tt><br> + $ds9 foo.fits[1] # load first extension</tt> <tt><br> + $ds9 foo.fits[order=ring,layout=equatorial,col=1,quad=1,system=unknown]<br> -</tt> <tt>$ds9 foo.fits[1,order=nested] # first extension, nested -order</tt><br></blockquote> -<p><b><a name="FITSDataCube" id="FITSDataCube"></a>FITS -Cube</b></p> -A FITS Cube is a FITS image which contains more than 2 axes -(NAXES>2). DS9 will automatically detect if a cube is present -and will load all additional images. In addition, individual images -can be loaded one at a time into a cube. DS9 will display the Cube -dialog box which allows the user to select which 2 image to be -displayed. -<p><b><a name="FITSMultipleExtensionDataCube" id= -"FITSMultipleExtensionDataCube"></a>FITS Multiple Extension -Cube</b></p> -A FITS Multiple Extension Data Cube file is a FITS file with one or -more extensions, that is to be displayed as a data cube. Each image -does not have to be the same size, however, only the coordinate -systems from the first extension will be used for contours and -grids.<br> -<blockquote><tt>Example:</tt><br> -<tt>$ds9 -mecube foo.fits # load multiple extension fits file as -data cube</tt></blockquote> -<p><b><a name="FITSMultipleExtensionMultipleFrames" id= -"FITSMultipleExtensionMultipleFrames"></a>FITS Multiple Extension -Multiple Frames</b></p> -Load a multiple extension FITS file into multiple frames. Please -note that files loaded via standard-in or the xpa fits command can -not be displayed using this method.<br> -<blockquote><tt>Example:</tt><br> -<tt>$ds9 -multiframe foo.fits # load multiple extension fits file -as multiple frames</tt></blockquote> -<p><b><a name="FITSMosaic" id="FITSMosaic"></a>FITS Mosaic</b></p> -A FITS mosaic image may exist as a series of FITS files, or as one -FITS file with many extensions. A FITS mosaic may be loaded all a -one time, or by the segment. Once loaded, the multiple FITS images -are treated as one FITS image.<br> -<br> -DS9 supports three forms of mosaics: -<center> -<table align="center" border="1" cellpadding="2" cellspacing="2" -width="50%"> -<tbody> -<tr> -<td valign="top"><tt>IRAF</tt><br></td> -<td valign="top"><tt>contains the DETSEC and DETSIZE keywords.<br> -See <a href= -"http://iraf.noao.edu/projects/ccdmosaic/imagedef/imagedef.html">NOAO -IRAF Mosaic Data Structures</a></tt><br></td> -</tr> -<tr> -<td align="left" valign="top"><tt>WCS</tt><br></td> -<td align="left" valign="top"><tt>each FITS image contains a valid -WCS.</tt><br></td> -</tr> -<tr> -<td align="left" valign="top"><tt>HST WFPC2</tt><br></td> -<td align="left" valign="top"><tt>valid HST WFPC2 data cube, -consisting of 4 planes, along with a fits ascii table containing -wcs information.</tt></td> -</tr> -</tbody> -</table> -</center> -<blockquote><tt>Example:</tt><br> -<tt>$ds9 -mosaicimage iraf foo.fits # load mosaic iraf from one -fits file with multiple exts</tt><br> -<tt>$ds9 -mosaic iraf foo.fits bar.fits wow.fits # load mosaic iraf -from 3 files</tt><br> -<tt>$ds9 -mosaicimage wcs foo.fits # load mosaic wcs from one fits -file with multiple exts</tt><br> -<tt>$ds9 -mosaic wcs foo.fits bar.fits wow.fits # load mosaic wcs -from 3 files</tt><br> -<tt>$ds9 -mosaicimage wfpc2 bar.fits # load wfpc2 mosaic</tt><br> -<tt>$ds9 -mosaic foo.fits bar.fits wow.fits # load mosaic (wcs) -from 3 files</tt><br></blockquote> -<p><b><a name="FITSMosaicDataCube" id="FITSMosaicDataCube"></a>FITS -Mosaic Data Cube</b></p> -A FITS Mosaic Data Cube is a FITS mosaic image which contains more -than 2 axes (NAXES>2). DS9 will automatically detect if a mosaic -data cube is present and will load all additional images. At the -same time, DS9 will display the data cube dialog box which allows -the user to select which 2 image to be displayed. -<p><b><a name="FITSRGB" id="FITSRGB"></a>FITS RGB</b></p> -A FITS RGB image may exist as three of FITS images, one FITS file -with three extensions, or as a FITS 3D Data cube, with three -slices, each representing the red, green, and blue channel. A FITS -RGB image may be loaded all a one time, or by the channel. Once -loaded, the multiple FITS images are treated as one FITS image.<br> -<blockquote><tt>Example:</tt><br> -<tt>$ds9 -rgbimage rgb.fits # load rgb image consisting of one fits -file with 3 image exts</tt><br> -<tt>$ds9 -rgbcube cube.fits # load rgb image consisting of one fits -data cube</tt><br> -<tt>$ds9 -rgb -red foo.fits -green bar.fits -blue wow.fits # rgb -image from 3 fits images</tt><br></blockquote> -<p><b><a name="SplitFITS" id="SplitFITS"></a>Split FITS</b></p> -A split fits is a valid fits file in which two files contain the -header and data segments. -<p><b><a name="array" id="array"></a>Array</b></p> -Raw data arrays are supported. To load an array, the user must -provide the dimensions, pixel depth, and optional header size and -architecture type. -<blockquote><tt>Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename[arr]<br></tt></tt></tt> -filename[arr][sect]<br></tt> <tt><tt>filename[sect][arr]<br> - </tt></tt></tt></tt><br> -where</tt><br> -<tt><tt><tt>sect: see <a href= -"file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS -Image</a><br></tt></tt> arr:<br></tt> -<blockquote><tt>xdim=value</tt><br> -<tt>ydim=value</tt><br> -<tt>zdim=value # default is a depth of 1</tt><br> -<tt>dim=value</tt><br> -<tt>dims=value</tt><br> -<tt>bitpix=[8|16|-16|32|64|-32|-64]</tt><br> -<tt>skip=value # must be even, most must be factor of 4</tt><br> -<tt>arch|endian=[big|bigendian|little|littleendian]</tt><br></blockquote> -<tt>Example:<br> -$ds9 -array bar.arr[xdim=512,ydim=512,zdim=1,bitpix=16] # load -512x512 short<br> -$ds9 -array bar.arr[dim=256,bitpix=-32,skip=4] # load 256x256 float -with 4 byte head<br> -$ds9 -array bar.arr[dim=512,bitpix=32,arch=little] # load 512x512 -long, intel<br></tt> -<p>or alternate format:</p> -<tt>filename[array(<type><dim><:skip><endian>)]<br> - -<br> -where:<br> -type:</tt> -<blockquote><tt>'b' 8 -bit unsigned char<br> -'s' 16-bit short int<br> -'u' 16-bit unsigned short int<br> -'i' 32-bit int<br> -'l' 64-bit int<br> -'r' 32-bit float<br> -'f' 32-bit float<br> -'d' 64-bit float</tt></blockquote> -<tt>dim:</tt> -<blockquote><tt>int # x,y dim<br> -int.int # x,y dim<br> -int.int.int # x,y,z dim<br></tt></blockquote> -<tt>skip:</tt> -<blockquote><tt>int # number of bytes to -skip</tt></blockquote> -<tt>endian:</tt> -<blockquote><tt>'l' little endian<br> -'b' big endian<br></tt></blockquote> -<tt>Example:<br> -$ds9 -array bar.arr[array(s512)] # load 512x512 -short<br> -$ds9 -array bar.arr[array(r256:4)] # load 256x256 float with 4 byte -head<br> -$ds9 -array bar.arr[array(i512l)] # load 512x512 long, -intel</tt> -<p>The shell environment variable <tt>DS9_ARRAY</tt> may be used to -specify default array parameters.</p> -<tt>Example:<br> -$export DS9_ARRAY='[dim=256,bitpix=-32]'<br> -$ds9 -array foo.arr # load 256x256 float<br></tt></blockquote> -<p><b><a name="nrrd" id="nrrd"></a>NRRD (Nearly Raw Raster -Data)</b><br></p> -Images in NRRD are supported directly. Encodings supported: -<tt>raw, gzip<br></tt><br> -<tt>Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt> -filename[sect]<br></tt></tt></tt></tt><br> -<tt><tt><tt><tt><tt><tt>where:<br> -sect: see <a href= -"file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS -Image</a><br></tt></tt></tt> <tt><tt><br></tt></tt></tt></tt></tt> -<tt>Example:</tt><br> -<tt>$ds9 -nrrd foo.nrrd<br> -$ds9 -nrrd foo.nrrd[100:200,100:200] # cropped</tt><br> -<p><b><a name="envi" id="envi"></a>ENVI</b><br></p> -Images in ENVI are supported directly. Encodings supported: -<tt>BIL, BIP, BSQ.<br></tt><br> -<tt>Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt> -filename[sect]<br> -<br> -where:</tt></tt></tt></tt><br> -<tt><tt><tt><tt><tt><tt>sect: see <a href= -"file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS -Image</a><br></tt></tt></tt> <tt><tt><br></tt></tt></tt></tt></tt> -<tt>Example:</tt><br> -<tt>$ds9 -envi foo.hdr foo.bsq<br> -$ds9 -envi foo.hdr foo.bsq[100:200,100:200] # cropped<br></tt> -<p><b><a name="gif" id="gif"></a>GIF</b><br></p> -Images in GIF are supported directly. For a <tt>Frame</tt>, the -average of the luminosity is used. For <tt>Frame RGB</tt>, each -channel is loaded directly.<br> -<tt><br> -Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt></tt></tt></tt></tt><br> - -<tt>Example:<br></tt> <tt>$ ds9 -gif foo.gif</tt><br> -<p><b><a name="tiff" id="tiff"></a>TIFF</b><br></p> -Images in TIFF are supported directly. For a <tt>Frame</tt>, the -average of the luminosity is used. For <tt>Frame RGB</tt>, each -channel is loaded directly.<br> -<br> -<tt>Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt></tt></tt></tt></tt><br> - -<tt>Example:</tt><br> -<tt>$ ds9 -tiff foo.tiff</tt><br> -<p><b><a name="jpeg" id="jpeg"></a>JPEG</b><br></p> -Images in JPEG are supported directly. For a <tt>Frame</tt>, the -average of the luminosity is used. For <tt>Frame RGB</tt>, each -channel is loaded directly.<br> -<tt><br> -Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt></tt></tt></tt></tt><br> - -<tt>Example:</tt><br> -<tt>$ ds9 -jpeg foo.jpeg</tt><br> -<p><b><a name="png" id="png"></a>PNG</b><br></p> -Images in PNG are supported directly. For a <tt>Frame</tt>, the -average of the luminosity is used. For <tt>Frame RGB</tt>, each -channel is loaded directly.<br> -<br> -<tt>Syntax:<br></tt> -<tt><tt><tt><tt><tt><tt><tt>filename<br></tt></tt></tt></tt></tt></tt></tt><br> - -<tt>Example:</tt><br> -<tt>$ ds9 -png foo.png</tt><br> -<p><b><a name="ExternalFileSupport" id= -"ExternalFileSupport"></a>External File Support</b></p> -DS9 supports external file formats via an ASCII description file. -When loading a file into DS9, these descriptions are referenced for -instructions for loading the file, based on the file extension. If -found, the command is executed and the result, a FITS image or FITS -Binary Table, is read into DS9 via stdin.<br> -At start-up, DS9 first searches for the ASCII file, named -<tt>.ds9.fil</tt>in the local directory, then in the users home -directory.<br> -The file command first is macro-expanded to fill in user-defined -arguments and then is executed externally.<br> -The ASCII file that defines the known image files consists of one -or more file descriptors, each of which has the following format: -<blockquote><tt>Help description<br> -A space-separated list of templates<br> -A space-separated list of file types (not currently used)<br> -The command line for the loading this file -type<br></tt></blockquote> -Note that blank lines separate the file descriptions and should not -be used as part of a description. Also, the '#' character is a -comment character.<br> -<br> -The following macros are supported: <tt>$filename</tt><br> -<blockquote><tt>For Example:</tt><br> -<tt># File access descriptions:</tt><br> -<tt># help explanation</tt><br> -<tt># file template</tt><br> -<tt># file type</tt><br> -<tt># access command</tt><br> -<tt>IRAF IMH files</tt><br> -<tt>*.imh</tt><br> -<tt>IMH</tt><br> -<tt>i2f -s $filename</tt></blockquote> -<p><b><a name="ExternalAnalysisSupport" id= -"ExternalAnalysisSupport"></a>External Analysis Support</b></p> -For more information about external analysis support files, see -<a href="analysis.html">Analysis</a>. -<p><b><a name="RegionFiles" id="RegionFiles"></a>Region -Files</b></p> -DS9 can read and write a number of region file formats. See -<a href="region.html">Regions</a> documentation for more -information. -<blockquote><tt><a href= -"region.html#RegionDescriptions">DS9</a><br> -<a href="region.html#FUNTools">FUNTools</a><br> -<a href="region.html#Ciao">Ciao</a><br> -<a href="region.html#SAOimage">SAOimage</a><br> -<a href="region.html#IRAFPROS">IRAF PROS</a><br> -<a href="region.html#FITSREGIONBinaryTable">FITS REGION Binary -Table</a><br> -<a href="region.html#XY">X Y</a><br></tt></blockquote> -<p><b><a name="ContourFiles" id="ContourFiles"></a>Contour -Files</b></p> -See <a href= -"file:///Users/joye/saods9/ds9/doc/ref/contour.html#ContourFiles">Contours</a> -documentation for more information.<br> -<p><b><a name="ColorLookupTable" id="ColorLookupTable"></a>Color -Lookup Table</b></p> -DS9 has a number of default colormaps available to the user. DS9 -also supports reading and writing color lookup table formats from -the following programs: -<blockquote><tt><a href= -"http://tdc-www.harvard.edu/software/saoimage/saoimage.color.html#cmap"> -SAOimage</a><br> -<a href= -"http://hea-www.harvard.edu/RD/saotng/adding_cmaps.html">SAOtng</a><br> - -XImtool<br></tt></blockquote> -DS9 uses the file extension to determine the color table format: -<center> -<table nosave="" border="1" cellpadding="2" cellspacing="2" width= -"50%"> -<tbody> -<tr nosave=""> -<td nosave=""> -<center><tt>Ext</tt></center> -</td> -<td> -<center><tt>Format</tt></center> -</td> -</tr> -<tr> -<td><tt>.lut</tt></td> -<td><tt>XImtool, SAOtng</tt></td> -</tr> -<tr> -<td><tt>.sao</tt></td> -<td><tt>DS9, SAOimage</tt></td> -</tr> -<tr> -<td><tt>any other</tt></td> -<td><tt>DS9</tt></td> -</tr> -</tbody> -</table> -</center> -<p><b><a name="WCS" id="WCS"></a>WCS</b></p> -A new WCS specification can be loaded and used by the current image -regardless of the WCS that was contained in the image file. WCS -specification can be sent to DS9 as an ASCII file via XPA. The -format of the specification is a set of valid FITS keywords that -describe a WCS. -<blockquote><tt>Example:<br> - CRPIX1 + </tt> <tt>$ds9 foo.fits[1,order=nested] # first extension, + nested + order</tt><br> + </blockquote> + <p><b><a name="FITSDataCube" id="FITSDataCube"></a>FITS + Cube</b></p> + A FITS Cube is a FITS image which contains more than 2 axes + (NAXES>2). DS9 will automatically detect if a cube is present + and will load all additional images. In addition, individual + images + can be loaded one at a time into a cube. DS9 will display the Cube + dialog box which allows the user to select which 2 image to be + displayed. + <p><b><a name="FITSMultipleExtensionDataCube" + id="FITSMultipleExtensionDataCube"></a>FITS Multiple + Extension + Cube</b></p> + A FITS Multiple Extension Data Cube file is a FITS file with one + or + more extensions, that is to be displayed as a data cube. Each + image + does not have to be the same size, however, only the coordinate + systems from the first extension will be used for contours and + grids.<br> + <blockquote><tt>Example:</tt><br> + <tt>$ds9 -mecube foo.fits # load multiple extension fits file as + data cube</tt></blockquote> + <p><b><a name="FITSMultipleExtensionMultipleFrames" + id="FITSMultipleExtensionMultipleFrames"></a>FITS Multiple + Extension + Multiple Frames</b></p> + Load a multiple extension FITS file into multiple frames. Please + note that files loaded via standard-in or the xpa fits command can + not be displayed using this method.<br> + <blockquote><tt>Example:</tt><br> + <tt>$ds9 -multiframe foo.fits # load multiple extension fits + file + as multiple frames</tt></blockquote> + <p><b><a name="FITSMosaic" id="FITSMosaic"></a>FITS Mosaic</b></p> + A FITS mosaic image may exist as a series of FITS files, or as one + FITS file with many extensions. A FITS mosaic may be loaded all a + one time, or by the segment. Once loaded, the multiple FITS images + are treated as one FITS image.<br> + <br> + DS9 supports three forms of mosaics: + <center> + <table width="50%" cellspacing="2" cellpadding="2" border="1" + align="center"> + <tbody> + <tr> + <td valign="top"><tt>IRAF</tt><br> + </td> + <td valign="top"><tt>contains the DETSEC and DETSIZE + keywords.<br> + See <a + href="http://iraf.noao.edu/projects/ccdmosaic/imagedef/imagedef.html">NOAO +IRAF + Mosaic Data Structures</a></tt><br> + </td> + </tr> + <tr> + <td valign="top" align="left"><tt>WCS</tt><br> + </td> + <td valign="top" align="left"><tt>each FITS image contains + a valid + WCS.</tt><br> + </td> + </tr> + <tr> + <td valign="top" align="left"><tt>HST WFPC2</tt><br> + </td> + <td valign="top" align="left"><tt>valid HST WFPC2 data + cube, + consisting of 4 planes, along with a fits ascii table + containing + wcs information.</tt></td> + </tr> + </tbody> + </table> + </center> + <blockquote><tt>Example:</tt><br> + <tt>$ds9 -mosaicimage iraf foo.fits # load mosaic iraf from one + fits file with multiple exts</tt><br> + <tt>$ds9 -mosaic iraf foo.fits bar.fits wow.fits # load mosaic + iraf + from 3 files</tt><br> + <tt>$ds9 -mosaicimage wcs foo.fits # load mosaic wcs from one + fits + file with multiple exts</tt><br> + <tt>$ds9 -mosaic wcs foo.fits bar.fits wow.fits # load mosaic + wcs + from 3 files</tt><br> + <tt>$ds9 -mosaicimage wfpc2 bar.fits # load wfpc2 mosaic</tt><br> + <tt>$ds9 -mosaic foo.fits bar.fits wow.fits # load mosaic (wcs) + from 3 files</tt><br> + </blockquote> + <p><b><a name="FITSMosaicDataCube" id="FITSMosaicDataCube"></a>FITS +Mosaic + Data Cube</b></p> + A FITS Mosaic Data Cube is a FITS mosaic image which contains more + than 2 axes (NAXES>2). DS9 will automatically detect if a + mosaic + data cube is present and will load all additional images. At the + same time, DS9 will display the data cube dialog box which allows + the user to select which 2 image to be displayed. + <p><b><a name="FITSRGB" id="FITSRGB"></a>FITS RGB</b></p> + A FITS RGB image may exist as three of FITS images, one FITS file + with three extensions, or as a FITS 3D Data cube, with three + slices, each representing the red, green, and blue channel. A FITS + RGB image may be loaded all a one time, or by the channel. Once + loaded, the multiple FITS images are treated as one FITS image.<br> + <blockquote><tt>Example:</tt><br> + <tt>$ds9 -rgbimage rgb.fits # load rgb image consisting of one + fits + file with 3 image exts</tt><br> + <tt>$ds9 -rgbcube cube.fits # load rgb image consisting of one + fits + data cube</tt><br> + <tt>$ds9 -rgb -red foo.fits -green bar.fits -blue wow.fits # rgb + image from 3 fits images</tt><br> + </blockquote> + <p><b><a name="SplitFITS" id="SplitFITS"></a>Split FITS</b></p> + A split fits is a valid fits file in which two files contain the + header and data segments. + <p><b><a name="array" id="array"></a>Array</b></p> + Raw data arrays are supported. To load an array, the user must + provide the dimensions, pixel depth, and optional header size and + architecture type. + <blockquote><tt>Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename[arr]<br> + </tt></tt></tt> + filename[arr][sect]<br> + </tt> <tt><tt>filename[sect][arr]<br> + </tt></tt></tt></tt><br> + where</tt><br> + <tt><tt><tt>sect: see <a + href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS + Image</a><br> + </tt></tt> arr:<br> + </tt> + <blockquote><tt>xdim=value</tt><br> + <tt>ydim=value</tt><br> + <tt>zdim=value # default is a depth of 1</tt><br> + <tt>dim=value</tt><br> + <tt>dims=value</tt><br> + <tt>bitpix=[8|16|-16|32|64|-32|-64]</tt><br> + <tt>skip=value # must be even, most must be factor of 4</tt><br> + <tt>arch|endian=[big|bigendian|little|littleendian]</tt><br> + </blockquote> + <tt>Example:<br> + $ds9 -array bar.arr[xdim=512,ydim=512,zdim=1,bitpix=16] # load + 512x512 short<br> + $ds9 -array bar.arr[dim=256,bitpix=-32,skip=4] # load 256x256 + float + with 4 byte head<br> + $ds9 -array bar.arr[dim=512,bitpix=32,arch=little] # load + 512x512 + long, intel<br> + </tt> + <p>or alternate format:</p> + <tt>filename[array(<type><dim><:skip><endian>)]<br> + <br> + where:<br> + type:</tt> + <blockquote><tt>'b' 8 -bit unsigned char<br> + 's' 16-bit short int<br> + 'u' 16-bit unsigned short int<br> + 'i' 32-bit int<br> + 'l' 64-bit int<br> + 'r' 32-bit float<br> + 'f' 32-bit float<br> + 'd' 64-bit float</tt></blockquote> + <tt>dim:</tt> + <blockquote><tt>int # x,y dim<br> + int.int # x,y dim<br> + int.int.int # x,y,z dim<br> + </tt></blockquote> + <tt>skip:</tt> + <blockquote><tt>int # number of bytes to + skip</tt></blockquote> + <tt>endian:</tt> + <blockquote><tt>'l' little endian<br> + 'b' big endian<br> + </tt></blockquote> + <tt>Example:<br> + $ds9 -array bar.arr[array(s512)] # load 512x512 + short<br> + $ds9 -array bar.arr[array(r256:4)] # load 256x256 float with 4 + byte + head<br> + $ds9 -array bar.arr[array(i512l)] # load 512x512 long, + intel</tt> + <p>The shell environment variable <tt>DS9_ARRAY</tt> may be + used to + specify default array parameters.</p> + <tt>Example:<br> + $export DS9_ARRAY='[dim=256,bitpix=-32]'<br> + $ds9 -array foo.arr # load 256x256 float<br> + </tt></blockquote> + <p><b><a name="nrrd" id="nrrd"></a>NRRD (Nearly Raw Raster + Data)</b><br> + </p> + Images in NRRD are supported directly. Encodings supported: + <tt>raw, gzip<br> + </tt><br> + <tt>Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt> + filename[sect]<br> + </tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt>where:<br> + sect: see <a + href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS + Image</a><br> + </tt></tt></tt> <tt><tt><br> + </tt></tt></tt></tt></tt> + <tt>Example:</tt><br> + <tt>$ds9 -nrrd foo.nrrd<br> + $ds9 -nrrd foo.nrrd[100:200,100:200] # cropped</tt><br> + <p><b><a name="envi" id="envi"></a>ENVI</b><br> + </p> + Images in ENVI are supported directly. Encodings supported: + <tt>BIL, BIP, BSQ.<br> + </tt><br> + <tt>Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt> + filename[sect]<br> + <br> + where:</tt></tt></tt></tt><br> + <tt><tt><tt><tt><tt><tt>sect: see <a + href="file:///Users/joye/saods9/ds9/doc/ref/FITSImage">FITS + Image</a><br> + </tt></tt></tt> <tt><tt><br> + </tt></tt></tt></tt></tt> + <tt>Example:</tt><br> + <tt>$ds9 -envi foo.hdr foo.bsq<br> + $ds9 -envi foo.hdr foo.bsq[100:200,100:200] # cropped<br> + </tt> + <p><b><a name="gif" id="gif"></a>GIF</b><br> + </p> + Images in GIF are supported directly. For a <tt>Frame</tt>, the + average of the luminosity is used. For <tt>Frame RGB</tt>, each + channel is loaded directly.<br> + <tt><br> + Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt></tt></tt></tt></tt><br> + <tt>Example:<br> + </tt> <tt>$ ds9 -gif foo.gif</tt><br> + <p><b><a name="tiff" id="tiff"></a>TIFF</b><br> + </p> + Images in TIFF are supported directly. For a <tt>Frame</tt>, the + average of the luminosity is used. For <tt>Frame RGB</tt>, each + channel is loaded directly.<br> + <br> + <tt>Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt></tt></tt></tt></tt><br> + <tt>Example:</tt><br> + <tt>$ ds9 -tiff foo.tiff</tt><br> + <p><b><a name="jpeg" id="jpeg"></a>JPEG</b><br> + </p> + Images in JPEG are supported directly. For a <tt>Frame</tt>, the + average of the luminosity is used. For <tt>Frame RGB</tt>, each + channel is loaded directly.<br> + <tt><br> + Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt></tt></tt></tt></tt><br> + <tt>Example:</tt><br> + <tt>$ ds9 -jpeg foo.jpeg</tt><br> + <p><b><a name="png" id="png"></a>PNG</b><br> + </p> + Images in PNG are supported directly. For a <tt>Frame</tt>, the + average of the luminosity is used. For <tt>Frame RGB</tt>, each + channel is loaded directly.<br> + <br> + <tt>Syntax:<br> + </tt> + <tt><tt><tt><tt><tt><tt><tt>filename<br> + </tt></tt></tt></tt></tt></tt></tt><br> + <tt>Example:</tt><br> + <tt>$ ds9 -png foo.png</tt><br> + <p><b><a name="ExternalFileSupport" id="ExternalFileSupport"></a>External + File Support</b></p> + DS9 supports external file formats via an ASCII description file. + When loading a file into DS9, these descriptions are referenced + for + instructions for loading the file, based on the file extension. If + found, the command is executed and the result, a FITS image or + FITS + Binary Table, is read into DS9 via stdin.<br> + At start-up, DS9 first searches for the ASCII file, named + <tt>.ds9.fil</tt>in the local directory, then in the users home + directory.<br> + The file command first is macro-expanded to fill in user-defined + arguments and then is executed externally.<br> + The ASCII file that defines the known image files consists of one + or more file descriptors, each of which has the following format: + <blockquote><tt>Help description<br> + A space-separated list of templates<br> + A space-separated list of file types (not currently used)<br> + The command line for the loading this file + type<br> + </tt></blockquote> + Note that blank lines separate the file descriptions and should + not + be used as part of a description. Also, the '#' character is a + comment character.<br> + <br> + The following macros are supported: <tt>$filename</tt><br> + <blockquote><tt>For Example:</tt><br> + <tt># File access descriptions:</tt><br> + <tt># help explanation</tt><br> + <tt># file template</tt><br> + <tt># file type</tt><br> + <tt># access command</tt><br> + <tt>IRAF IMH files</tt><br> + <tt>*.imh</tt><br> + <tt>IMH</tt><br> + <tt>i2f -s $filename</tt></blockquote> + <p><b><a name="ExternalAnalysisSupport" + id="ExternalAnalysisSupport"></a>External Analysis Support</b></p> + For more information about external analysis support files, see + <a href="analysis.html">Analysis</a>. + <p><b><a name="RegionFiles" id="RegionFiles"></a>Region + Files</b></p> + DS9 can read and write a number of region file formats. See + <a href="region.html">Regions</a> documentation for more + information. + <blockquote><tt><a href="region.html#RegionDescriptions">DS9</a><br> + <a href="region.html#FUNTools">FUNTools</a><br> + <a href="region.html#Ciao">Ciao</a><br> + <a href="region.html#SAOimage">SAOimage</a><br> + <a href="region.html#IRAFPROS">IRAF PROS</a><br> + <a href="region.html#FITSREGIONBinaryTable">FITS REGION Binary + Table</a><br> + <a href="region.html#XY">X Y</a><br> + </tt></blockquote> + <p><b><a name="ContourFiles" id="ContourFiles"></a>Contour + Files</b></p> + See <a href="contour.html">Contours</a> + documentation for more information.<br> + <p><b><a name="ColorLookupTable" id="ColorLookupTable"></a>Color + Lookup Table</b></p> + DS9 has a number of default colormaps available to the user. DS9 + also supports reading and writing color lookup table formats from + the following programs: + <blockquote><tt> + SAOimage<br> + SAOtng<br> + XImtool<br> + </tt></blockquote> + DS9 uses the file extension to determine the color table format: + <center> + <table nosave="" width="50%" cellspacing="2" cellpadding="2" + border="1"> + <tbody> + <tr nosave=""> + <td nosave=""> + <center><tt>Ext</tt></center> + </td> + <td> + <center><tt>Format</tt></center> + </td> + </tr> + <tr> + <td><tt>.lut</tt></td> + <td><tt>XImtool, SAOtng</tt></td> + </tr> + <tr> + <td><tt>.sao</tt></td> + <td><tt>DS9, SAOimage</tt></td> + </tr> + <tr> + <td><tt>any other</tt></td> + <td><tt>DS9</tt></td> + </tr> + </tbody> + </table> + </center> + <p><b><a name="WCS" id="WCS"></a>WCS</b></p> + A new WCS specification can be loaded and used by the current + image + regardless of the WCS that was contained in the image file. WCS + specification can be sent to DS9 as an ASCII file via XPA. The + format of the specification is a set of valid FITS keywords that + describe a WCS. + <blockquote><tt>Example:<br> + CRPIX1 = -257.75<br> - CRPIX2 + 257.75<br> + CRPIX2 = -258.93<br> - CRVAL1 = --201.94541667302<br> - CRVAL2 + 258.93<br> + CRVAL1 + = + -201.94541667302<br> + CRVAL2 = --47.45444<br> - CDELT1 -= -2.1277777E-4<br> - CDELT2 -= 2.1277777E-4<br> - CTYPE1 = 'RA---TAN'<br> - CTYPE2 = 'DEC--TAN'<br></tt></blockquote> -Note that the WCS definitions can contain standard FITS 80 -character WCS card images, as shown above, or free-form name/value -pairs without the intervening "=" sign: -<blockquote><tt> CRPIX1 -257.75<br> - CRPIX2 258.93<br> - CRVAL1 -201.94541667302<br> - CRVAL2 -47.45444<br> - CDELT1 -2.1277777E-4<br> - CDELT2 2.1277777E-4<br> - CTYPE1 'RA---TAN'<br> - CTYPE2 'DEC--TAN'</tt></blockquote> -<p><b><a name="PreferenceFile" id="PreferenceFile"></a>Preference -File</b></p> -A preference file is a valid tcl script generated by DS9 to save -the current preference items. See <a href= -"prefs.html">Preferences</a> for more information. -<p><b><a name="StartupFile" id="StartupFile"></a>Startup -File</b></p> -If a startup file <tt>$HOME/ds9.ini</tt> is available, it is -sourced as the last step in initialization. The file permissions -must be group/world readonly.<br> -Users may have several different startup files. DS9 looks for a -startup file with its own name. By default, if the application is -named <tt>ds9</tt>, it will look for <tt>.ds9.ini.</tt> However, if -the DS9 application is named <tt>foo</tt>, then DS9 will look for -<tt>.foo.ini.</tt> In this manner, the user can have several -predefined startup files that are activated by invoking DS9 with a -different application names.<br> -<p><b><a name="TCL" id="TCL"></a>TCL</b></p> -TCL/TK script file. Users may customize the appearance and enhance -the capabilities of DS9 by sourcing their own TCL -scripts.</blockquote> -</body> + -47.45444<br> + CDELT1 + = -2.1277777E-4<br> + CDELT2 + = 2.1277777E-4<br> + CTYPE1 = 'RA---TAN'<br> + CTYPE2 = 'DEC--TAN'<br> + </tt></blockquote> + Note that the WCS definitions can contain standard FITS 80 + character WCS card images, as shown above, or free-form name/value + pairs without the intervening "=" sign: + <blockquote><tt> CRPIX1 + 257.75<br> + CRPIX2 258.93<br> + CRVAL1 -201.94541667302<br> + CRVAL2 -47.45444<br> + CDELT1 -2.1277777E-4<br> + CDELT2 2.1277777E-4<br> + CTYPE1 'RA---TAN'<br> + CTYPE2 'DEC--TAN'</tt></blockquote> + <p><b><a name="PreferenceFile" id="PreferenceFile"></a>Preference + File</b></p> + A preference file is a valid tcl script generated by DS9 to save + the current preference items. See <a href="prefs.html">Preferences</a> + for more information. + <p><b><a name="StartupFile" id="StartupFile"></a>Startup + File</b></p> + If a startup file <tt>$HOME/ds9.ini</tt> is available, it is + sourced as the last step in initialization. The file permissions + must be group/world readonly.<br> + Users may have several different startup files. DS9 looks for a + startup file with its own name. By default, if the application is + named <tt>ds9</tt>, it will look for <tt>.ds9.ini.</tt> However, + if + the DS9 application is named <tt>foo</tt>, then DS9 will look for + <tt>.foo.ini.</tt> In this manner, the user can have several + predefined startup files that are activated by invoking DS9 with a + different application names.<br> + <p><b><a name="TCL" id="TCL"></a>TCL</b></p> + TCL/TK script file. Users may customize the appearance and enhance + the capabilities of DS9 by sourcing their own TCL + scripts.</blockquote> + </body> </html> |