Geocentric and Geodetic

[TriangleMan]

This is a tired old question, and OT, but I will ask anyway.

Does anybody know of a web site that offers:
1. Geocentric to Geodetic conversion using multiple DATUMS.
2. Source code in something other than FORTRAN for this?

I'd be happy to just find the snippet with the correct constants. I need to account for the difference between Clarke 1866 and WGS 84.

[plasmonster]

I'm not sure about this, but try vterrain or USGS .

[lxnyce]

Not sure as well, but you can also try :

http://www.remotesensing.org/gdal/ (rasters)
http://www.remotesensing.org/ogr/ (vectors)

It handles reprojections between different coordinate systems, so it might be able to help you out.

[ToolTech]

Check out geotrans...

[TriangleMan]

Tatuk GIS calculator did what I wanted. I found it on www.giscafe.com

Thanks for all the suggestions!