Geoconv: Geographic Coordinates Conversion

Geoconv: Geographic coordinates conversion

I have been working on geographic coordinates conversion routines in java.

Download and installation

The source code and jar files are available here. The code is distributed under GPL license. See the license file in the archive for more details.

To unpack the archive enter:

tar zxvf geoconv.tgz

Under windows, I would recommend that you format your hard drive and install a decent version of linux instead. If that is not an option, winzip shareware should do it.

To execute the program you need to install a java virtual machine on your system. See SUN java page for more details. Then just enter:

java -jar geoconv.jar

Run "java -jar geoconv.jar -help" or read the README file for some usage guidelines.

Supported coordinate systems

Currently, the library can convert coordinates to and from:

WGS84: the standard GPS coordinate system
UTM: The Universal Transverse Mercator projective system
Lambert: the French projective coordinate system
LambertIIe: the extended French projective coordinate system
Lambert93: the new Lambert system
CH1903: the Swiss projective coordinate system

More informations on geographic coordinates conversion

I found all informations I needed to implement these conversion routines on the IGN web site (French National Geographic Institute). In particular you will find general information on geographic coordinate systems, information on French projective systems, and coordinate conversion algorithms.

The Swiss coordinate conversion is documented here.

Eric Sibert has also been developping a coordinates conversion software, available from here, now in open source.

Johan Montagnat