Your First Steps With the Geography Data Type | LearnSQL.com
Nearest neighbour in POSTGIS | Duncan Golicher's weblog
Kartoza - How to Create a Point Distance Marker Layer Along a Line in PostGIS
An Overview of SRID and Coordinate System - Alibaba Cloud Community
QGIS: Distance Calculations II – gis4design
GeoFile: Everything in the Radius with PostGIS - Compose Articles
postgis - Using ST_Transform() to get the length of a LineString using SRID 4326 returning very small numbers - Geographic Information Systems Stack Exchange
LinuxFest NW - Using Postgis To Add Some Spatial Flavor To Your App