def safe_extra(extra):
    return re.sub('[^A-Za-z0-9.]+', '_', extra).lower()
Returns True if this SpatialReference is local (root node is LOCAL_CS).
dataset/ETHPy150Open anzev/hedwig/build/pip/pip/_vendor/pkg_resources/__init__.py/safe_extra--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/gdal/srs.py/SpatialReference.local