[postgis-users] Merge all polygons from a dataset

[Pedro Doria Meunier]

Hi Erik,

(PostGIS 'listers' please forgive me)

I know this is a bit off-topic but have you tried OpenJump?
http://openjump.org/wiki/show/HomePage

You have easy-going multiple polygons merging... ;-)

As to what Erik asked, I'd also like to know as I've never tried that
too ... :)

HTH,
Pedro Doria Meunier


On Fri, 2008-08-01 at 12:12 +0200, danny wrote:
> Hello everybody,
> 
> I've converted a shapefile of Europe to PostGIS. I would like to merge
> all the countries together so that I only have one polygon left, the
> whole contour of Europe. I have tried ST_Union that gives me no
> result. I've tried several other functions to no avail. Does anybody
> know how I should proceed?
> 
> Many thanks,
> 
> Erik
> 
> 
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