/**
* Reads a {@link CoordinateReferenceSystem} from a prj file.
*
* @param filePath the path to the prj file or the connected datafile it sidecar file for.
* @param extension the extension of the data file. If <code>null</code> it is assumed to be prj.
* @return the read {@link CoordinateReferenceSystem}.
* @throws Exception
*/
@SuppressWarnings("nls")
public static CoordinateReferenceSystem readProjectionFile(String filePath, String extension)
throws Exception {
CoordinateReferenceSystem crs = null;
String prjPath = null;
String filePathLower = filePath.trim().toLowerCase();
if (filePathLower.endsWith(".prj")) {
// it is the prj file
prjPath = filePath;
} else if (extension != null && filePathLower.endsWith("." + extension)) {
// datafile was supplied (substitute extension)
int dotLoc = filePath.lastIndexOf(".");
prjPath = filePath.substring(0, dotLoc);
prjPath = prjPath + ".prj";
} else {
prjPath = filePath + ".prj";
}
File prjFile = new File(prjPath);
if (!prjFile.exists()) {
throw new ModelsIOException("The prj file doesn't exist: " + prjPath, "CRSUTILITIES");
}
String wkt = FileUtilities.readFile(prjFile);
crs = CRS.parseWKT(wkt);
return crs;
}
