<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
<font face="sans-serif">Hi Leo,<br>
<br>
Thanks a lot for your prompt answer.<br>
Your book definitely helps a lot!<br>
<br>
Thanks and regards,<br>
</font>
<pre class="moz-signature" cols="72">Richard Gomes
<a class="moz-txt-link-freetext" href="http://www.jquantlib.org/index.php/User:RichardGomes">http://www.jquantlib.org/index.php/User:RichardGomes</a>
twitter: frgomes
JQuantLib is a library for Quantitative Finance written in Java.
<a class="moz-txt-link-freetext" href="http://www.jquantlib.com/">http://www.jquantlib.com/</a>
twitter: jquantlib
</pre>
<br>
On 04/04/11 06:30, Paragon Corporation wrote:
<blockquote cite="mid:CB41E787B22B43DCA63E98625696C497@J"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<meta name="GENERATOR" content="MSHTML 8.00.7601.17537">
<div dir="ltr" align="left"><span class="640442405-04042011"><font
face="Arial" color="#0000ff" size="2">Richard,</font></span></div>
<div dir="ltr" align="left"><span class="640442405-04042011"></span> </div>
<div dir="ltr" align="left"><span class="640442405-04042011"><font
face="Arial" color="#0000ff" size="2">Are you points in
longitude, latitude. If they are the best place to start
might be using the geography type. This requires using
PostGIS 1.5+</font></span></div>
<div dir="ltr" align="left"><span class="640442405-04042011"></span> </div>
<div dir="ltr" align="left"><span class="640442405-04042011"><font
color="#0000ff"><a moz-do-not-send="true"
href="http://www.postgis.org/documentation/manual-1.5SVN/ch04.html#PostGIS_Geography">http://www.postgis.org/documentation/manual-1.5SVN/ch04.html#PostGIS_Geography</a></font></span></div>
<div dir="ltr" align="left"><span class="640442405-04042011"></span> </div>
<div dir="ltr" align="left"><span class="640442405-04042011"><font
face="Arial" color="#0000ff" size="2">You can also read the
free chapter of our book which covers this in some detail.</font></span></div>
<div dir="ltr" align="left"><span class="640442405-04042011"></span> </div>
<div dir="ltr" align="left"><span class="640442405-04042011"><font
color="#0000ff"><a moz-do-not-send="true"
href="http://www.postgis.us/chapter_01">http://www.postgis.us/chapter_01</a></font></span></div>
<div> </div>
<div><span class="640442405-04042011"><font face="Arial"
color="#0000ff" size="2">Leo</font></span></div>
<div><span class="640442405-04042011"><font face="Arial"
color="#0000ff" size="2"><a moz-do-not-send="true"
href="http://www.postgis.us">http://www.postgis.us</a></font></span></div>
<div><span class="640442405-04042011"></span> </div>
<div><br>
</div>
<div dir="ltr" class="OutlookMessageHeader" align="left"
lang="en-us">
<hr tabindex="-1">
<font face="Tahoma" size="2"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:postgis-users-bounces@postgis.refractions.net">postgis-users-bounces@postgis.refractions.net</a>
[<a class="moz-txt-link-freetext" href="mailto:postgis-users-bounces@postgis.refractions.net">mailto:postgis-users-bounces@postgis.refractions.net</a>] <b>On
Behalf Of </b>Richard Gomes<br>
<b>Sent:</b> Monday, April 04, 2011 12:46 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a><br>
<b>Subject:</b> [postgis-users] Converting meters to another
unit<br>
</font><br>
</div>
<font face="sans-serif">Hi All,<br>
<br>
I'm a newbie on PostGIS and GIS in general.<br>
<br>
Reading section "Taking Advantages of Indexes" at<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://postgis.refractions.net/docs/ch04.html#id2638955">http://postgis.refractions.net/docs/ch04.html#id2638955</a><br>
<br>
... I became confused regarding how I could retrieve points
which are distant up to 500 meters from a given point.<br>
The question is actually how I can transform 500 meters onto
some some other figure on a unit I don't understand very well
what it is about. I need this calculation in order to determine
a Box3d like the article suggests.<br>
<br>
Thanks a lot and regards,<br>
</font><font face="sans-serif"><br>
</font>-- <br>
<pre class="moz-signature" cols="72">Richard Gomes
</pre>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
postgis-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:postgis-users@postgis.refractions.net">postgis-users@postgis.refractions.net</a>
<a class="moz-txt-link-freetext" href="http://postgis.refractions.net/mailman/listinfo/postgis-users">http://postgis.refractions.net/mailman/listinfo/postgis-users</a>
</pre>
</blockquote>
</body>
</html>