[mapserver-users] Admin boundaries styling
Rahkonen Jukka
jukka.rahkonen at mmmtike.fi
Wed Dec 18 02:22:45 PST 2013
Hi,
Would it be acceptable to create a new dataset for rendering the borders by converting polygons into linestrings and merging the overlapping segments? With OpenJUMP you cound do it with a single operation Tools - Edit Geometry - Convert - Extract Segments. Select option "Merge resulting segments" and you've done it.
-Jukka Rahkonen-
Frank Broniewski wrote:
> Hi,
>
> I'm trying to get the styling right for administrative boundaries. The data source
> is a polygon shapefile with administrative boundaries of a certain level. I want to
> have a dashed line style to symbolize the boundary. The layer is used as TYPE
> LINE.
>
>
> The style I'm using:
>
> STYLE
> Color 100 100 100
> Gap 4
> Linecap butt
> Linejoin miter
> Linejoinmaxsize 3
> Pattern 2 6 2 6 2 6 End
> Symbol "circle"
> Width 2
> END
>
> Problem is that the pattern overlaps where a boundary is drawn more than once
> due to the shared nature of adjacent adminstrative units.
> Since the source is a shapefile there's no topology that would prevent the issue
> and my PostGis DB doesn't support that (yet)*. Here's a screenshot that displays
> the issue:
> http://www.geometrico.lu/devel/mapserver/boundary-styling.png
> As you can see the styling varies greatly. So - does anyone have a clue on how to
> get the styling right? It should look like in the lower right corner of the
> screenshot ...
>
> Many thanks,
>
> Frank
>
>
> * BTW: can Mapserver handle PostGIS topology geometry types?
>
>
> - --
> Frank BRONIEWSKI
>
> METRICO s.à r.l.
> géomètres
> technologies d'information géographique
> rue des Romains 36
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>
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