sql - Calculate the angle of exterior rings PostGIS (polygons & multipolygons) - Stack Overflow
Mastering PostGIS
postgresql - How to snap line string start & end vertex to the nearest point? - Stack Overflow
SpatiaLite Cookbook Topic: Cooking basics
9. Geometries — Introduction to PostGIS
geos - Closing a concave V-shaped MultiLineString in PostGIS to form a Polygon - Geographic Information Systems Stack Exchange
postgis-demo/GEOMETRIES.md at master · cantzakas/postgis-demo · GitHub
9. Geometries — Introduction to PostGIS
geos - Closing a concave V-shaped MultiLineString in PostGIS to form a Polygon - Geographic Information Systems Stack Exchange
shapefile - Points of LinearRing do not form a closed linestring - one point intersection - Geographic Information Systems Stack Exchange
shape types
1022 (Buffering a specific closed linestring erroneously produces polygon without hole.) – GEOS
9. Geometries — Introduction to PostGIS
Geometric Objects - Spatial Data Model — Geospatial Analysis with Python and R 2020 documentation
The Shapely User Manual — Shapely 0 documentation
PostGIS - Tipps und Tricks – Geoinformation HSR
postgis - Closed Linestring - Geographic Information Systems Stack Exchange
Chapter 2. Geometry types - PostGIS in Action
shapefile - Points of LinearRing do not form a closed linestring - one point intersection - Geographic Information Systems Stack Exchange
snapping - PostGIS snap line segment endpoint to closest other line segment - Geographic Information Systems Stack Exchange
The Shapely User Manual — Shapely 0 documentation
RFC: Fixing invalid geometry · Issue #652 · locationtech/jts · GitHub
Check if point is inside unclosed linestring using POSTGIS ST Functions - Geographic Information Systems Stack Exchange
Check direction of linestring against corresponding polygon using SpatiaLite - Geographic Information Systems Stack Exchange
