protected GridSpatialIndex() {
}
public static SpatialIndex createInstance(Properties pset) {
Storage storage = StorageFactory.getInstance().createStorage(pset);
int gridsize = Integer.parseInt(pset.getProperty(GRID_SIZE_PROPERTY));
int gridcapacity = Integer.parseInt(pset.getProperty(GRID_CAPACITY_PROPERTY));
double minx = Double.parseDouble(pset.getProperty(ROOT_MBR_MINX_PROPERTY));
double miny = Double.parseDouble(pset.getProperty(ROOT_MBR_MINY_PROPERTY));