This is a library and command-line tool for GIS.
Currently, it generates maps and computes perimters, areas, and compactness. You can use it to look at your congressional district for evidence of gerrymandering.
hgis is best installed with stack. Try
stack install hgis
stack install hgis --flag hgis:-cairo
to install with bindings cairo library, which will enable outputs as PNGs.
You can also clone this repository and type
stack build if you want to start hacking.
From the command line, type
hgis map --output OUTPUT.svg FILE.shp
to read a shapefile and write an svg.
You can use e.g.
hgis map --output OUTPUT.svg --projection bonne FILE.shp
to force the use of the Bonne projection.
Haddock documentation can be accessed through hackage.