<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt"><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;">I'm thinking the most accurate way to do it is to use a projection that supports miles that is close to your current extent... or use something crappy like Mercator.<br><br>This code is off the top of my head, without looking at any docs... so bear with me if there are errors.<br><br>$latlon = ms_newProjectionObj("proj=EPSG:4230"); # IIRC<br>$proj = ms_newProjectionObj("proj=EPSG:3758"); # Popular Web-mapping projection<br><br>$centerPoint = ms_newPointObj($x, $y); # in lat long<br><br>$centerPoint->project($latlon, $proj);<br><br>$minPoint = ms_newPointObj();<br>$maxPoint = ms_newPointObj();<br><br>$mInM = 1609; # mile in meters, as 3758 is in meters<br>$minPoint->setXY($centerPoint.x - $mInM, $centerPoint.y -
$mInM);<br>$maxPoint->setXY($centerPoint.x + $mInM, $centerPoint.y + $mInM);<br><br>$minPoint->project($proj, $latlon);<br>$maxPoint->project($proj, $latlon);<br><br>return implode(',',array($minPoint->x,$minPoint->y,$maxPoint->x,$maxPoint->y));<br><br><br><br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Oscar Fdez. <ofarcis@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> mapserver-dev@lists.osgeo.org<br><b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 11, 2009 11:53:26 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [mapserver-dev] Calculate Bounding Box...<br></font><br>
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<p class="MsoNormal"><span style="color: black;" lang="EN-US">Hi to all,<br>
<br>
Any people know how to calculate the bounding box from lon/lat coordinates.<br>
<br>
An example:<br>
<br>
I have a point in -8.0572,42.4702 (lon/lan). I like a bounding box arround 1
mile of this site. Can use any SRS like EPSG:4230 or another.<br>
<br>
</span><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: black;" lang="EN-US">Any solution is accepted independent of language. I translate to
my need. I hope develop in php mapscript, but the solution can made in any
language…</span></p>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: black;" lang="EN-US">Thanks for all,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: black;" lang="EN-US">Oscar.</span></p>
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<p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif";"> </span></p>
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