diff options
Diffstat (limited to 'ds9/doc/ref/grid.html')
| -rw-r--r-- | ds9/doc/ref/grid.html | 175 |
1 files changed, 87 insertions, 88 deletions
diff --git a/ds9/doc/ref/grid.html b/ds9/doc/ref/grid.html index ed772cc..baeeff1 100644 --- a/ds9/doc/ref/grid.html +++ b/ds9/doc/ref/grid.html @@ -1,90 +1,89 @@ -<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en"> +<!DOCTYPE doctype PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> - <head> - <meta http-equiv="Content-Type" content="text/html; - charset=ISO-8859-1"> - <meta name="GENERATOR" content="Mozilla/4.78 [en] (X11; U; Linux - 2.4.7-10 i686) [Netscape]"> - <title>Coordinate Grids</title> - </head> - <body alink="#ff0000" bgcolor="#ffffff" link="#0000ee" text="#000000" - vlink="#551a8b"> - <h3><img alt="" src="../sun.gif" align="middle" height="98" - width="100"> Coordinate Grids</h3> - <blockquote> - <p>DS9 can create and display coordinate grids as an overlay on an - image. The Display Coordinate Grid Menu is used to display - grids. A coordinate grid is composed of Grid Lines, Axes, - Border, and Title. Axes include tick marks, title, and numbers. - The appearance of the coordinate grid is specified by - parameters. These parameters may be configured via the - Coordinate Grid Parameters dialog box. In addition to the axes - titles and the grid title, the following menus are available. </p> - <p><b><a name="Format"></a>Numeric Formats</b></p> - <p>The user may specify custom numeric formats for either axes. - The format specification can be empty (default) or a print - function, based on the selected coordinate system:<br> - </p> - <blockquote> <tt>image</tt><br> - <tt>physical</tt><br> - <tt>detector</tt><br> - <tt>amplifier</tt><br> - <tt>wcs linear</tt><br> - <tt>wcs equatorial</tt><br> - </blockquote> - <p>The format specification string to be passed to the C "printf" - function (e.g. "%%1.7G") in order to format a single coordinate - value.</p> - <p>The Format string supplied should contain one or more of the - following characters. These may occur in any order, but the - following is recommended for clarity:</p> - <blockquote> "": Indicates that a plus sign should be prefixed to - positive values. By default, no plus sign is used.<br> - "z": Indicates that leading zeros should be prefixed to the - value so that the first field is of constant width, as would be - required in a fixed-width table (leading zeros are always - prefixed to any fields that follow). By default, no leading - zeros are added.<br> - "i": Use the standard ISO field separator (a colon) between - fields. This is the default behaviour.<br> - "b": Use a blank to separate fields.<br> - "l": Use a letter ("h"/"d", "m" or "s" as appropriate) to - separate fields.<br> - "g": Use a letter and symbols to separate fields ("h"/"d", "m" - or "s", etc, as appropriate), but include escape sequences in - the formatted value so that the Plot class will draw the - separators as small super-scripts.<br> - "d": Include a degrees field. Expressing the angle purely in - degrees is also the default if none of "h", "m", "s" or "t" are - given.<br> - "h": Express the angle as a time and include an hours field - (where 24 hours correspond to 360 degrees). Expressing the angle - purely in hours is also the default if "t" is given without - either "m" or "s".<br> - "m": Include a minutes field. By default this is not included.<br> - "s": Include a seconds field. By default this is not included. - This request is ignored if "d" or "h" is given, unless a minutes - field is also included.<br> - "t": Express the angle as a time (where 24 hours correspond to - 360 degrees). This option is ignored if either "d" or "h" is - given and is intended for use where the value is to be expressed - purely in minutes and/or seconds of time (with no hours field). - If "t" is given without "d", "h", "m" or "s" being present, then - it is equivalent to "h".<br> - ".": Indicates that decimal places are to be given for the final - field in the formatted string (whichever field this is). The "." - should be followed immediately by an unsigned integer which - gives the number of decimal places required, or by an asterisk. - If an asterisk is supplied, a default number of decimal places - is used which is based on the value of the Digits attribute.<br> - </blockquote> - <p>All of the above format specifiers are case-insensitive. If - several characters make conflicting requests (e.g. if both "i" - and "b" appear), then the character occurring last takes - precedence, except that "d" and "h" always override "t".</p> - <p>The default formats are <tt>d.3</tt> for degrees and <tt>hms.1</tt> - / <tt>dms.1</tt> / <tt>ldms.1</tt> for sexagesimal.<br> - </p> - </blockquote> - </body> +<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>Coordinate Grids</title> +</head> +<body alink="#FF0000" bgcolor="#FFFFFF" link="#0000EE" text= +"#000000" vlink="#551A8B"> +<h3><img alt="" src="../sun.gif" align="middle" height="98" width= +"100"> Coordinate Grids</h3> +<blockquote> +<p>DS9 can create and display coordinate grids as an overlay on an +image. The Display Coordinate Grid Menu is used to display grids. A +coordinate grid is composed of Grid Lines, Axes, Border, and Title. +Axes include tick marks, title, and numbers. The appearance of the +coordinate grid is specified by parameters. These parameters may be +configured via the Coordinate Grid Parameters dialog box. In +addition to the axes titles and the grid title, the following menus +are available.</p> +<p><b><a name="Format" id="Format"></a>Numeric Formats</b></p> +<p>The user may specify custom numeric formats for either axes. The +format specification can be empty (default) or a print function, +based on the selected coordinate system:<br></p> +<blockquote><tt>image</tt><br> +<tt>physical</tt><br> +<tt>detector</tt><br> +<tt>amplifier</tt><br> +<tt>wcs linear</tt><br> +<tt>wcs equatorial</tt><br></blockquote> +<p>The format specification string to be passed to the C "printf" +function (e.g. "%%1.7G") in order to format a single coordinate +value.</p> +<p>The Format string supplied should contain one or more of the +following characters. These may occur in any order, but the +following is recommended for clarity:</p> +<blockquote>"": Indicates that a plus sign should be prefixed to +positive values. By default, no plus sign is used.<br> +"z": Indicates that leading zeros should be prefixed to the value +so that the first field is of constant width, as would be required +in a fixed-width table (leading zeros are always prefixed to any +fields that follow). By default, no leading zeros are added.<br> +"i": Use the standard ISO field separator (a colon) between fields. +This is the default behaviour.<br> +"b": Use a blank to separate fields.<br> +"l": Use a letter ("h"/"d", "m" or "s" as appropriate) to separate +fields.<br> +"g": Use a letter and symbols to separate fields ("h"/"d", "m" or +"s", etc, as appropriate), but include escape sequences in the +formatted value so that the Plot class will draw the separators as +small super-scripts.<br> +"d": Include a degrees field. Expressing the angle purely in +degrees is also the default if none of "h", "m", "s" or "t" are +given.<br> +"h": Express the angle as a time and include an hours field (where +24 hours correspond to 360 degrees). Expressing the angle purely in +hours is also the default if "t" is given without either "m" or +"s".<br> +"m": Include a minutes field. By default this is not included.<br> +"s": Include a seconds field. By default this is not included. This +request is ignored if "d" or "h" is given, unless a minutes field +is also included.<br> +"t": Express the angle as a time (where 24 hours correspond to 360 +degrees). This option is ignored if either "d" or "h" is given and +is intended for use where the value is to be expressed purely in +minutes and/or seconds of time (with no hours field). If "t" is +given without "d", "h", "m" or "s" being present, then it is +equivalent to "h".<br> +".": Indicates that decimal places are to be given for the final +field in the formatted string (whichever field this is). The "." +should be followed immediately by an unsigned integer which gives +the number of decimal places required, or by an asterisk. If an +asterisk is supplied, a default number of decimal places is used +which is based on the value of the Digits +attribute.<br></blockquote> +<p>All of the above format specifiers are case-insensitive. If +several characters make conflicting requests (e.g. if both "i" and +"b" appear), then the character occurring last takes precedence, +except that "d" and "h" always override "t".</p> +<p>The default formats are <tt>d.3</tt> for degrees and +<tt>hms.1</tt> / <tt>dms.1</tt> / <tt>ldms.1</tt> for +sexagesimal.<br></p> +</blockquote> +</body> </html> |