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Re: projection info (.prj file) from ESRI Shape [message #47428 is a reply to message #47359]

Wed, 08 February 2006 09:10

MarioIncandenza
Messages: 231
Registered: February 2005

Senior Member

Fang,

The routine you're looking for may not be out there. Thing is, not even
all of ESRI's own software bothers to read the .PRJ files.

But, if you open them up, you can see that the format is very simple,
and you could handily write a reader for them. But if you are really
dealing with many different projections, that could be too much.

The GDAL package, a free Unix/Linux project, includes a utility called
OGR2OGR (http://www.gdal.org/ogr/ogr2ogr.html). Docs for that program
assert that "This program can be used to convert simple features data
between file formats performing various operations during the process
such as spatial or attribute selections, reducing the set of
attributes, setting the output coordinate system or even reprojecting
the features during translation."

This program can take shapefile input and give shapefile output, and
(since it is Unix) can be run in batch mode.

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[Message index]

		projection info (.prj file) from ESRI Shape By: Weihua FANG on Tue, 07 February 2006 03:01
		Re: projection info (.prj file) from ESRI Shape By: Weihua FANG on Thu, 09 February 2006 02:51
		Re: projection info (.prj file) from ESRI Shape By: MarioIncandenza on Wed, 08 February 2006 09:10

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