[mapserver-users] Multiple geometry layer

[Rahkonen Jukka]

Hi,

If you are using database in backgound perhaps there is no need to convert data. How about creating polygon layer by quering just polygon geometries by adding some SQL into layer DATA definition, and point layer by quering the point geometries with "WHERE polygon_geometry is null"?  

-Jukka Rahkonen-


-----Alkuperäinen viesti-----
Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: Tamas Szekeres
Lähetetty: la 14.6.2008 17:20
Vastaanottaja: Mark
Kopio: mapserver-users at lists.osgeo.org
Aihe: Re: [mapserver-users] Multiple geometry layer
 
Mark,

Though a data source may contain multiple geometry types in a single
layer you can specify only a single type per layer in mapserver. The
various drivers are trying to convert the geometries to the specified
target type if possible, however the point to polygon conversions
might not be implemented and supported at the moment. Moreover there`s
a significant difference how the different type of the layers are
rendered and the related parameters are taken into account. For this
reason you should probably convert the geometries to a single type at
data source level if possible.

Best regards,

Tamas


2008/6/14 Mark <mark.balman at gmail.com>:
> Hi all
>
> I was wondering if it is at all possible to define a layer that uses
> multiple geometries specifically point and polygon data? A current project I
> am working on requires that where there is no polygon then display a point
> instead - from what I have read so far this is not yet an implemented
> feature within mapserver. I am trying to avoid having dual layers for points
> and polygons for multiple datasets. Worst case would be to use buffered
> points but again this is not ideal. I would be grateful for any ideas that
> others may have.
>
> Thanks in advance
>
> Mark
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>
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