int mapObj_offsetExtent(mapObj *self, double x, double y) { return msMapOffsetExtent(self, x, y); }
int msMapSetCenter( mapObj *map, pointObj *center) { return msMapOffsetExtent(map, center->x - (map->extent.minx + map->extent.maxx) * 0.5, center->y - (map->extent.miny + map->extent.maxy) * 0.5); }