maup is the geospatial toolkit for redistricting data. The package streamlines the basic workflows that arise when working with blocks, precincts, and districts
Dec 25 — 5 mins read
This article shows how to create a function to filter the inner rings of a (multi)polygon in PostGIS.
Dec 25 — 2 mins read
sometime we need to find these error for more case and need. Here is my simple implementation for finding Topology Error using Postgis based on Dimensionally Extended nine-Intersection Model (DE-9IM).