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<div style="text-align: left;">Hallo</div>
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<div style="text-align: left;">ST_Expand should do the trick.</div>
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<div style="text-align: left;"><a href="http://postgis.org/documentation/manual-1.5/ST_Expand.html">http://postgis.org/documentation/manual-1.5/ST_Expand.html</a></div>
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<div style="text-align: left;">/Nicklas</div><br />
2010-07-20 Michael A. Peters wrote:<br />
<br />
First, thank you to the developers. Until about a week ago, my code for<br />
>range map generation was ugly and complex and broke frequently, and now<br />
>that I am using PostGIS - it's a LOT simpler.<br />
><br />
>I have one map that still needs to be ported to the new way of doing things.<br />
><br />
>http://www.shastaherps.org/map/pitContact.svg<br />
><br />
>The contact zone is an intersection between polygons from two geometries.<br />
>I am getting that from PostGIS via ST_Intersection and it looks perfect.<br />
><br />
>The map shows creeks in the contact zone and a buffer area around it, and<br />
>right now, the coordinates for what to grab is hard coded. What I want it<br />
>to do is grab X kilometers in each compass directions around the<br />
>intersection, so that as the range maps for the species are updated<br />
>resulting in altered contact zone, the map will auto-adjust.<br />
><br />
>I can't figure out how to get the bounding box for the intersection. It<br />
>would be nice to be able to simply ask for the bounding box + X kilometers<br />
>in each direction if PostGIS can do that (I'm running 1.3.2 on CentOS -<br />
>that's stock EPEL build) but I can do the math outside of PostGIS if<br />
>necessary. I just can't figure out how to get the bounding box returned.<br />
><br />
>Thanks for any tips.<br />
><br />
>-----<br />
>Michael A. Peters<br />
><br />
>http://www.shastaherps.org/<br />
>_______________________________________________<br />
>postgis-users mailing list<br />
>postgis-users@postgis.refractions.net<br />
>http://postgis.refractions.net/mailman/listinfo/postgis-users<br />
><br />
>
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