Before we start, ST_DelaunayTriangles is available only in PostGIS 2.1 using GEOS 3.4. This is one of the few recipes in this book to require such advanced versions of PostGIS and GEOS.
Before we start, ST_DelaunayTriangles is available only in PostGIS 2.1 using GEOS 3.4. This is one of the few recipes in this book to require such advanced versions of PostGIS and GEOS.