cartagen.mesh_density_selection

mesh_density_selection(gdf_roads, seuil_densite, col_importance=None)

Select the important road segments based on mesh density.

Select the important road segments based on mesh density, following the algorithm by Chen et al. [1] The algorithm iteratively removes the least important road segments that are located on the boundary of the densest mesh, until all meshes have a density below the specified threshold.

Parameters:

gdf_roadsgpd.GeoDataFrame

The GeoDataFrame containing the LineString of the road network.

seuil_densitefloat

The density threshold above which a segment must be eliminated.

col_importancestr, optional

The name of the column indicating the importance (e.g., road class). If None, the length of the segment is used (the shortest is eliminated).

Returns:

gpd.GeoDataFrame

A geodataframe containing the road network after selection and generalization.

See also

street_selection

Select urban road segments based on block aggregation.

strokes_road

Calculate strokes inside a road network.

rural_traffic

Detect central roads inside a network using traffic simulation.

References

[1]

Jun Chen, Yungang Hu, Zhilin Li, Renliang Zhao, and Liqiu Meng. Selective omission of road features based on mesh density for automatic map generalization. International Journal of Geographical Information Science, 23(8):1013–1032, 2009. URL: http://dx.doi.org/10.1080/13658810802070730, doi:10.1080/13658810802070730.

(Source code)