geostore/tiles/sigtools.py
class SIGTools(object):
"""
This class collects all the sig functions to use in TileVect, GeomConfig
"""
@classmethod
def get_extent_of_layer(cls, layer):
"""
Outputs length of the smaller size of the features' bbox
Returns 0 if the bbox is a Point
"""
min_extent_features = float(0)
# output might be a Point if single Point feature
query = layer.get_extent()
extent = query['extent']
if extent:
x1 = query['extent'][0]
x2 = query['extent'][2]
y1 = query['extent'][1]
y2 = query['extent'][3]
if x1 != x2 and y1 != y2:
# not a point
min_extent_features = min(float(abs(x2 - x1)), float(abs(y2 - y1)))
return min_extent_features