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simplification

Continuous Integration

State-of-the-Art simplification of street network geometry with Python

Contents

./core/

The curated & tested code base for the project & publication, including:

  • The novel algorithm(s) developed and demonstrated; and
  • Utility and plotting functionality to support the publication and algorithm(s)

./notebooks/

Parameterized notebooks.

  • /preprocessing/: workflows used to preprocess raw data (clipping and removing degree 2 nodes)
  • /methods/: exploration of different simplification methods, including the new method proposed here, sgeop
  • /evaluation/: comparative evaluation of each simplification method
  • /usecases/: collection of use cases
  • /typology/: exploration of different types of face artifacts, foundational to the sgeop algorithm
  • /archive/: archived notebooks

./data/

Curated data in parquet format for 6 example urban areas

FUA City
1133 Aleppo, Syria, Middle East / Asia
869 Auckland, New Zealand, Oceania / Asia
809 Douala, Cameroon, Africa
1656 Liège, Belgium, Europe
4617 Bucaramanga, Colombia, S. America
4881 Salt Lake City, Utah, USA, N. America
8989 Wuhan, China, Far East / Asia

Each FUA directory contains (or will contain) the following items housing bespoke data:

  • manual/
  • no_degree_2/
  • original/
  • parenx/
  • polygons/

./notes/

Observations & hightlights from each package.

  • osmnx.md
  • cityseer.md

./protocol_images/

Demonstration plots generated through simplification_protocol.ipynb.

This directory only exists once that notebook has been run locally.

./resources/

Additional resources and previous related research.

./usecases/

Demonstration visualizations on specific types of urban form.

  • 809 (Douala)
    • cityseer (from notebooks/cityseer_overview_gaboardi.ipynb)
      • examples as douala_{1-5}.png
  • 869 (Auckland)
    • averagedegree (from notebooks/evaluate_h3cells.ipynb)
    • totallength (from notebooks/evaluate_h3cells.ipynb)
  • 1656 (Liège)
    • cityseer
      • parallel_edges_1_midline_False.mp4
      • parallel_edges_1_midline_True.mp4
      • parallel_edges_2_midline_False.mp4
      • parallel_edges_2_midline_True.mp4
      • parallel_edges_3_midline_False.mp4
      • parallel_edges_3_midline_True.mp4
    • osmnx
      • highway.mp4
      • intersection.mp4
      • parkinglot.mp4
      • roandabout.mp4
    • points.json - use case locations

environment.yml

Install and activate the conda (or mamba) environment, which creates an environment name simplification:

conda env create -f environment.yml
conda activate simplification