PostGIS Cookbook - Second Edition

Getting ready

As we will be using the Voronoi calculations from the Calculating Voronoi Diagram recipe in Chapter 4, Working with Vector Data – Advanced Recipes, you should refer to that recipe to prepare yourself for the functions used in this recipe.

We will use a stream dataset found in this book's source package under the hydrology folder. To load it, use the following command:

shp2pgsql -s 3734 -d -i -I -W LATIN1 -g the_geom ebrr_polygon chp06.voronoi_hydro | psql -U me -d postgis_cookbook

The streams we create will look as shown in the following screenshot: