[postgis-users] DE-9IM question

[Mike Toews]

On 9 May 2012 03:46, fork <forkandwait at gmail.com> wrote:
> Does anyone know of an exhaustive reference of DE-9IM matrices, with pictures?

A really handy visual tool to work with DE-9IM is JTS TestBuilder. You
can interact with the geometries and the results, which makes it a
pretty good educational tool. You can copy/paste WKB directly into the
geometry inputs, which makes it work nice with PostGIS.

Take a look at http://gis.stackexchange.com/a/12119/1872

-Mike