[Portugal] PostGIS in Action: PostGIS Online SQL tutorials

[José Manuel Estêvão]

PostGIS in Action: PostGIS Online SQL tutorials

PostGIS Online <http://www.postgisonline.org/> is a project started by Nicklas
Avén <http://blog.jordogskog.no/>.

This site will allow you to dynamically try PostGIS SQL statements on line
without even installing PostGIS. You can try some of the examples in chapter
2 of our book that are self standing examples and watch these dynamically
displayed on a map.

For example type in an SQL statement such as:
 SELECT ST_GeomFromText('POLYGON((-0.25 -1.25,-0.25 1.25,2.5 1.25,2.5
-1.25,-0.25 -1.25), (2.25 0,1.25 1,1.25 -1,2.25 0), (1 -1,1 1,0 0,1 -1))')
As the_geom

Then click the Map 1 button and watch as the geometry is drawn on the
screen.
http://www.postgis.us/page_postgis_online

http://www.postgisonline.org/

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