[postgis-users] visually linking the polygons of multipolygon layer

Chris Hermansen chris.hermansen at timberline.ca
Tue Sep 16 07:01:52 PDT 2008


 From a cartographic perspective, there is a long tradition of using a 
kind of double-ended fish-hook, or maybe I should say something like an 
integration symbol, to do this sort of thing.

If you're interested in catographic traditions!!!

As to functions, I've not seen anything like this.  If I were trying to 
do this, I would I suppose write a stored procedure that went through 
the multipart polygons, unwound each into its component polygons, find a 
point on each component polygon, build that list of points into the line 
string.

erik wrote:
> Hi,
>
> I'm not sure I know how to formulate this
> I have a set of Multipolygons. I'd like to link somehow the polygons 
> of each multipolygon  with a "string", an arc, that expresses their 
> belonging to the same polygon.
>
> Is this possible, is there some predefined function that could 
> accomplish this?
>
> Many thanks,
>
>


-- 
Regards,

Chris Hermansen         mailto:chris.hermansen at timberline.ca
tel+1.604.714.2878 · fax+1.604.733.0631 · mob+1.778.232.0644
Timberline Natural Resource Group · http://www.timberline.ca
401 · 958 West 8th Avenue  · Vancouver BC · Canada · V5Z 1E5




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