GIS stuff

What? Providing a way to perform the 10-parameter Molodensky-Badekas transformation (useful in the Netherlands, Venezuela, Costa Rica, etc.) How? Extending the extJCRS plugin, by providing the missing computations in pure Java. Usage? User provides text file with parameters and optionally an image to illustrate area of interest. Show me! Click image to enlarge or get poster in [PDF] and [OpenOffice] formats.

Thanks to Hervé Quinquenel (from the French Ecole Nationale des Sciences Géographiques , ENSG, http://www.ensg.eu and the Institut Géographique National , IGN, http://www.ign.fr ) we now have the official formulas for the conversion between WGS84 coordinates (EPSG:4326, used by the GNSS systems such as GPS) and the new official French projection (RGF93 - Lambert 93, EPSG:2154). You can see the formulas in the source code SVN repository, searching for the tag "AJOUT HERVE" in this file . Of course this conversion will also be available in the upcoming gvSIG Mobile 1.0. To check the correctness of this new Java code, we can use the coordinates of the Point zéro des routes de France (France road system zero point): EPSG:2154 X = 652215.52 m Y = 6861681.77 m EPSG:4326 48º 51' 12.24845'' N (48.8534023472) 2º 20' 55.62563'' E (2.3487848972) If we use those EPSG:4326 coordinates as the input for the formulas sent by Hervé, we get: X = 6522...