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Looking for module for EPSG coodinate conversion

by japhy (Canon)
on Sep 22, 2010 at 14:00 UTC ( [id://861282]=perlquestion: print w/replies, xml ) Need Help??

japhy has asked for the wisdom of the Perl Monks concerning the following question:

I'm big into plotting things that can be mapped using OpenLayers. However, I'm an absolute dunce when it comes to understanding the various projection schemas used. I don't know what EPSG4326 or EPSG900913 are. I just know that one has very funky numbers that don't look like lat/lng coords to me, and the other has normal-looking lat/lng coords.

In my JavaScript code, I just call the transform() method to do the conversion, but I don't know where to start to do that conversion in Perl. I don't know what module to look for. Any suggestions?

Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
Nos autem praedicamus Christum crucifixum (1 Cor. 1:23) - The Cross Reference (My Blog)

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Re: Looking for module for EPSG coodinate conversion
by fod (Friar) on Sep 22, 2010 at 14:52 UTC
[reply]
      Thanks. I just so happened to download and install proj4 before writing this node. I'm glad to see I was moving in the right direction. I'm still a bit baffled by the syntax, but I'm sure I'll figure it out.
      Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
      Nos autem praedicamus Christum crucifixum (1 Cor. 1:23) - The Cross Reference (My Blog)
[reply]

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