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authorWilliam Joye <wjoye@cfa.harvard.edu>2018-09-04 17:37:37 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2018-09-04 17:37:37 (GMT)
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+++ b/ds9/doc/ref/vo.html
@@ -1,69 +1,66 @@
-<!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>Virtual Observatory</title>
- </head>
- <body alink="#ff0000" bgcolor="#ffffff" vlink="#551a8b" text="#000000"
- link="#0000ff">
- <h3><img alt="" src="../sun.gif" align="middle" width="100" height="98">
- Virtual Observatory Reference</h3>
- <blockquote>
- <p><b>Summary</b></p>
- <p>Use the Web proxy connection if your firewall does not allow your
- computer to connect directly to external computers. In this case, you
- also must use DS9's internal browser.</p>
- <p><b>Details</b></p>
- <p>When you click on one of the Virtual Observatory servers in the VO
- list, DS9 will attempt to connect to that server and (if the internal
- Web display is enabled) display its Web page. The square box to the left
- of the server name turns yellow while the connection is being
- established and then green to signal success. </p>
- <p>A direct connection is fast and flexible. Among other things, it
- allows
- you to perform analysis on your own local data (the VO server will
- retrieve the image from DS9) and also allows you to use an
- external browser to load images. </p>
- <p>Some system managers configure their firewall explicitly to
- prevent
- computers in their care from making a direct connection to an external
- host. Instead, they only allow external access through a Web proxy<br>
- server (such as SOCKS). If you are using a computer behind a restricted
- firewall of this sort, then DS9 will not be able to connect directly to
- a VO server. The yellow box will not turn green and
- eventually DS9 will display an error message. </p>
- <p>In this case, you can choose to have DS9 communicate with the VO
- servers through your Web proxy server. DS9 will use your proxy to send
- its commands and retrieve its data and analysis results, rather than
- doing this directly. Note that the following restrictions apply:<br>
- </p>
- <blockquote> <i>The transfer of data is slower.<br>
- You must use the internal Web browser for loading images, etc.<br>
- You cannot perform analysis on local data.<br>
- There is a (large but finite) restriction on the number of
- annuli, and number of polygon points you can specify in a region, as
- well as the total number of regions allowed.</i><br>
- </blockquote>
- <p>If your computer and firewall have been configured to require use
- of a
- Web proxy server, you will have to tell DS9 about this server.
- Click the <b>Configure Web Proxy</b> button and type the relevant
- information into the boxes. (Your systems administrator will be able to
- tell you the details.) At this point,
- you should be able to connect to a VO server successfully. Please let
- us know if you have problems! </p>
- <blockquote>
- <p> <i>A final note: you may, of course, choose to use the Web
- proxy
- even
- if your computer and firewall are configured to allow direct
- connections. In this case, there is no need to configure the proxy
- server.<br>
- </i></p>
- </blockquote>
- </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>Virtual Observatory</title>
+</head>
+<body alink="#FF0000" bgcolor="#FFFFFF" vlink="#551A8B" text=
+"#000000" link="#0000FF">
+<h3><img alt="" src="../sun.gif" align="middle" width="100" height=
+"98"> Virtual Observatory Reference</h3>
+<blockquote>
+<p><b>Summary</b></p>
+<p>Use the Web proxy connection if your firewall does not allow
+your computer to connect directly to external computers. In this
+case, you also must use DS9's internal browser.</p>
+<p><b>Details</b></p>
+<p>When you click on one of the Virtual Observatory servers in the
+VO list, DS9 will attempt to connect to that server and (if the
+internal Web display is enabled) display its Web page. The square
+box to the left of the server name turns yellow while the
+connection is being established and then green to signal
+success.</p>
+<p>A direct connection is fast and flexible. Among other things, it
+allows you to perform analysis on your own local data (the VO
+server will retrieve the image from DS9) and also allows you to use
+an external browser to load images.</p>
+<p>Some system managers configure their firewall explicitly to
+prevent computers in their care from making a direct connection to
+an external host. Instead, they only allow external access through
+a Web proxy<br>
+server (such as SOCKS). If you are using a computer behind a
+restricted firewall of this sort, then DS9 will not be able to
+connect directly to a VO server. The yellow box will not turn green
+and eventually DS9 will display an error message.</p>
+<p>In this case, you can choose to have DS9 communicate with the VO
+servers through your Web proxy server. DS9 will use your proxy to
+send its commands and retrieve its data and analysis results,
+rather than doing this directly. Note that the following
+restrictions apply:<br></p>
+<blockquote><i>The transfer of data is slower.<br>
+You must use the internal Web browser for loading images, etc.<br>
+You cannot perform analysis on local data.<br>
+There is a (large but finite) restriction on the number of annuli,
+and number of polygon points you can specify in a region, as well
+as the total number of regions allowed.</i><br></blockquote>
+<p>If your computer and firewall have been configured to require
+use of a Web proxy server, you will have to tell DS9 about this
+server. Click the <b>Configure Web Proxy</b> button and type the
+relevant information into the boxes. (Your systems administrator
+will be able to tell you the details.) At this point, you should be
+able to connect to a VO server successfully. Please let us know if
+you have problems!</p>
+<blockquote>
+<p><i>A final note: you may, of course, choose to use the Web proxy
+even if your computer and firewall are configured to allow direct
+connections. In this case, there is no need to configure the proxy
+server.<br></i></p>
+</blockquote>
+</blockquote>
+</body>
</html>