def units(self):
        if self.projected or self.local:
            return (self.linear_units, self.linear_name)
        elif self.geographic:
            return (self.angular_units, self.angular_name)
        else:
            return (None, None)
Constructor.
dataset/ETHPy150Open CollabQ/CollabQ/vendor/django/contrib/gis/models.py/SpatialRefSysMixin.units--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/output_writers.py/RecordsPool.__init__