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I'm very new to GIS concepts. Is there a way or procedure of finding out whether the co-ordinate system is in UTM, latitude/longitude or in stateplane using .prj file?

My .prj file contains the following text:

GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]

Thanks in advance for the help.

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up vote 5 down vote accepted

check out Prj2EPSG here for defination of your epsg.

Prj2EPSG is a simple service for converting well-known text projection information from .prj files into standard EPSG codes.

i hope it helps you...

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thanks..great link! – vinayan Aug 8 '12 at 9:02
you're welcome :) – Aragon Aug 8 '12 at 9:05
@Aragon Thank you :-) – Sibi Oct 7 '12 at 12:15

The best reference I know to help you understand a .prj file is which explains the notation and should help you decode them.

Other resources include which will allow you to look up and download .prj files for various projections. Another useful site is where you can convert .prj files to standard epsg codes which other software can understand.

In your specific example above it's lat/lon.

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Thanks for the help. It was informative. – Sibi Aug 8 '12 at 10:21

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