Mander
A Python package and command line utility for calculating compactness metrics of electoral districts.
Example
What scores are available?
import mander
mander.getListOfScores()
Getting scores for GeoJSON:
import mander
geojson_data = """{ "type": "FeatureCollection", "features": [{"type": "Feature","properties": {},"geometry": { "type": "Polygon", "coordinates": [ [ [ -30.585937499999996, 27.68352808378776 ], [ -2.8125, 27.68352808378776 ], [ -2.8125, 46.800059446787316 ], [ -30.585937499999996, 46.800059446787316 ], [ -30.585937499999996, 27.68352808378776 ] ] ] } } ] }"""
mander.getScoresForGeoJSON(geojson_data)
Augmenting an existing shapefile with compactness scores:
import mander
mander.augmentShapefileWithScores("us_electoral_districts.shp")
Compactness Metrics
Compactness scores are calculated using the underlying compactnesslib a list of the scores available and how they are calculated is available here.
Credits
This package was created for the Metric Geometry And Gerrymandering Group as part of a hack-a-thon on August 10-11, 2017.