From PostGIS in Action, Third Edition by Leo S. Hsu and Regina O. Obe
In this article, you’ll learn what a topology is, how to build a topology from scratch, and how to use commonly available geometry data.
From PostGIS in Action, Third Edition by Regina O. Obe and Leo S. Hsu
This article discusses some common spatial reference systems relevant for GIS.
From PostGIS in Action, Third Edition by Leo S. Hsu and Regina O. Obe
