def test_from_shape():
p = Point(1, 2)
e = from_shape(p)
assert isinstance(e, WKBElement)
assert isinstance(e.data, buffer)
s = shapely.wkb.loads(bytes(e.data))
assert isinstance(s, Point)
assert p.equals(p)
def test_from_shape():
# Standard case: POINT(1 2)
expected = WKBElement(str('0101000000000000000000f03f0000000000000040'))
p = Point(1, 2)
e = from_shape(p)
assert isinstance(e, WKBElement)
assert isinstance(e.data, buffer)
assert e == expected
s = shapely.wkb.loads(bytes(e.data))
assert isinstance(s, Point)
assert s.equals(p)
# Standard case with SRID: SRID=2145;POINT(1 2)
expected2 = WKBElement(str('0101000000000000000000f03f0000000000000040'),
srid=2154)
p = Point(1, 2)
e2 = from_shape(p, srid=2154)
assert isinstance(e2, WKBElement)
assert isinstance(e2.data, buffer)
assert e2 == expected2
s2 = shapely.wkb.loads(bytes(e2.data))
assert isinstance(s2, Point)
assert s2.equals(p)
# Extended case: SRID=2145;POINT(1 2)
expected3 = WKBElement(
str('01010000206a080000000000000000f03f0000000000000040'),
extended=True)
e3 = from_shape(p, srid=2154, extended=True)
assert isinstance(e3, WKBElement)
assert isinstance(e3.data, buffer)
assert e3 == expected3
s3 = shapely.wkb.loads(bytes(e3.data))
assert isinstance(s, Point)
assert s3.equals(p)
def to_dict(self):
"""
Returns title number and geojson representing the extent.
Everything is stored as a multi-polygon, but we convert to a polygon if the
multi-polygon contains only 1 polygon
"""
shape = mapping(shapely.wkb.loads(bytes(self.extent.data)))
extent = {}
extent['crs'] = {'type': 'name', 'properties':{'name': 'urn:ogc:def:crs:EPSG:%s' % self.extent.srid}}
extent['type'] = 'Feature'
extent['properties'] = {}
if len(shape['coordinates']) == 1:
extent['geometry'] = {'coordinates': shape['coordinates'][0], 'type': 'Polygon'}
else:
extent['geometry'] = {'coordinates': shape['coordinates'], 'type': 'MultiPolygon'}
return {'title_number': self.title_number, 'extent': extent}
def geojson_from_wkbelement(wkb_element):
geometry = wkb.loads(bytes(wkb_element.data))
return geojson.dumps(geometry)
def geojson_from_wkbelement(wkb_element):
geometry = wkb.loads(bytes(wkb_element.data))
return geojson.dumps(geometry)