cityImage.simplify_graph#

cityImage.simplify_graph(nodes_gdf, edges_gdf, nodes_to_keep_regardless=[])[source]#

The function identify pseudo-nodes, namely nodes that represent intersection between only 2 segments. The segments geometries are merged and the node is removed from the nodes_gdf GeoDataFrame.

Parameters:

  • nodes_gdf (Point GeoDataFrame) – The nodes (junctions) GeoDataFrame.

  • edges_gdf (LineString GeoDataFrame) – The street segments GeoDataFrame.

  • nodes_to_keep_regardless (list) – List of nodeIDs representing nodes to keep, even when pseudo-nodes (e.g. stations, when modelling transport networks).

Returns:

nodes_gdf, edges_gdf – The cleaned junctions and street segments GeoDataFrames.

Return type:

tuple of GeoDataFrames