momepy.perimeter_wall#
- momepy.perimeter_wall(geometry, graph=None, buffer=0.01)[source]#
Calculate the perimeter wall length of the joined structure.
- Parameters:
- geometryGeoDataFrame | GeoSeries
A GeoDataFrame or GeoSeries containing polygons to analyse.
- graphGraph | None, optional
Graph encoding Queen contiguity of
geometry
. IfNone
Queen contiguity is built on the fly.- buffer: float
Buffer value for the geometry. It can be used to account for topological problems.
- Returns:
- Series
Examples
>>> path = momepy.datasets.get_path("bubenec") >>> buildings = geopandas.read_file(path, layer="buildings") >>> momepy.perimeter_wall(buildings) 0 137.186310 1 663.342296 2 663.342296 3 663.342296 4 663.342296 ... 139 42.839590 140 78.562927 141 147.342182 142 118.354123 143 342.909172 Name: perimeter_wall, Length: 144, dtype: float64
By default,
momepy
calculates a Queen contiguity graph to determine connected components. Alternatively, you can pass that yourself. This can be useful when the graph is already computed or when you need to use a different method due to topological issues.>>> from libpysal import graph >>> strict_contig = graph.Graph.build_contiguity( ... buildings, rook=False, strict=True, ... ) >>> momepy.perimeter_wall(buildings, graph=strict_contig) 0 137.186310 1 663.342296 2 663.342296 3 663.342296 4 663.342296 ... 139 42.839590 140 78.562927 141 147.342182 142 118.354123 143 342.909172 Name: perimeter_wall, Length: 144, dtype: float64