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I am looking to create an algorithm that converts datum in state plane coordinate system (1983) to lat long. I realize that ever state has there own zone and measurement system(meters, international feet, survey feet). Does anyone know of a existing library for this type of conversion? I have found an old FORTRAN program, http://www.ngs.noaa.gov/PC_PROD/SPCS83/ , however I would prefer to avoid the pain of translating this to java if at all possible.

Kara
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Patrick Jackson
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    You can use `PROJ.4` or `GDAL` library (which uses PROJ.4 library) to perform valid coordinate transformation conversion between two map projections. Although `GDAL` library is usually used with geo-referenced maps, you can actually use it with maps. – ecle Nov 23 '11 at 23:12
  • This [SO question](http://stackoverflow.com/questions/1676958/coordinate-transform) might be of good help for you :) – GETah Nov 23 '11 at 22:56

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A quick google turned up this candidate, which looks like it's on the right lines - does it help?

Map Projecton Library

Alvin Baena
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Duncan
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