File tlos = new File("./target/stpaul.los");
copyFile(las, tlas);
copyFile(los, tlos);
NADCONGridShiftFactory factory = new NADCONGridShiftFactory();
NADConGridShift shift = factory.loadGridShift(DataUtilities.fileToURL(tlas), DataUtilities.fileToURL(tlos));
// minor checks on the grid
assertNotNull(shift);
// now the good part, try to delete the files, on windows this will fail
// unless the sources were properly closed