Hi
I'm trying to display a map based on a large amount of multipolygons from my
postgres/postgis server.
When i display them using the polygon style, everything is colored red and
the outlines of the polygons are shown correct. However I'm interested in
getting the polygons drawn with some color and the background beeing
white/transparent.
I've been looking at a lot of different SDL files but can't seem to find any
which use the multipolygons.
Do you know how to structure the SDL file so the geoserver can display
multipolygons?
The Image is get is the following
http://www.nabble.com/file/p12094211/wms.png
Rolf
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Hi Rolf,
There is no specific style for multi polygons. Its all done with a
PolygonSymbolizer. To get a transparent polygons all you have to do is
leave off the "Fill" element. So something like:
<PolygonSymbolizer>
<Stroke>
<CssParameter name="stroke">#FF0000</CssParameter>
<CssParameter name="stroke-width">1</CssParameter>
</Stroke>
</PolygonSymbolizer>
-Justin
RolfKristensen wrote:
Hi
I'm trying to display a map based on a large amount of multipolygons from my
postgres/postgis server.
When i display them using the polygon style, everything is colored red and
the outlines of the polygons are shown correct. However I'm interested in
getting the polygons drawn with some color and the background beeing
white/transparent.
I've been looking at a lot of different SDL files but can't seem to find any
which use the multipolygons.
Do you know how to structure the SDL file so the geoserver can display
multipolygons?
The Image is get is the following
http://www.nabble.com/file/p12094211/wms.png
Rolf
--
Justin Deoliveira
The Open Planning Project
http://topp.openplans.org
This will only show the outline of the polygons.
as follows:
http://www.nabble.com/file/p12121998/2.png
However the output, I'm looking for, should look something like this:
http://www.nabble.com/file/p12121998/3.png
Rolf
Justin Deoliveira-4 wrote:
Hi Rolf,
There is no specific style for multi polygons. Its all done with a
PolygonSymbolizer. To get a transparent polygons all you have to do is
leave off the "Fill" element. So something like:
<PolygonSymbolizer>
<Stroke>
<CssParameter name="stroke">#FF0000</CssParameter>
<CssParameter name="stroke-width">1</CssParameter>
</Stroke>
</PolygonSymbolizer>
-Justin
RolfKristensen wrote:
Hi
I'm trying to display a map based on a large amount of multipolygons from
my
postgres/postgis server.
When i display them using the polygon style, everything is colored red
and
the outlines of the polygons are shown correct. However I'm interested in
getting the polygons drawn with some color and the background beeing
white/transparent.
I've been looking at a lot of different SDL files but can't seem to find
any
which use the multipolygons.
Do you know how to structure the SDL file so the geoserver can display
multipolygons?
The Image is get is the following
http://www.nabble.com/file/p12094211/wms.png
Rolf
--
Justin Deoliveira
The Open Planning Project
http://topp.openplans.org
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RolfKristensen ha scritto:
This will only show the outline of the polygons.
as follows:
http://www.nabble.com/file/p12121998/2.png
However the output, I'm looking for, should look something like this:
http://www.nabble.com/file/p12121998/3.png
That is pretty much strange, the red color in the background
should be there only if there is:
* a big polygon that covers all of the area
* a linestring or multilinestring mixed among the multipolygons
that is being filled anyways as the SLD spec mandates (the
spec says that if a polygon symbolizer is applied to a linestring,
that one has to be closed and treated as a polygon fill wise).
If the latter is the case, you either avoid to mix different
geometry types in the same column (some databases allow this)
or you can use the following filter to make sure the fill is
applied only to polygons:
<Rule>
<ogc:Filter>
<ogc:Or>
<ogc:PropertyIsEqualTo>
<ogc:Function name="geometryType">
<ogc:PropertyName>geomColumn</ogc:PropertyName>
</ogc:Function>
<ogc:Literal>Polygon</ogc:Literal>
</ogc:PropertyIsEqualTo>
<ogc:PropertyIsEqualTo>
<ogc:Function name="geometryType">
<ogc:PropertyName>geomColumn</ogc:PropertyName>
</ogc:Function>
<ogc:Literal>Multipolygon</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Or>
</ogc:Filter>
<PolygonSymbolizer>
...
</Rule>
Hope this helps. If not, can you send me a sample of your data
so that I can try to reproduce this behaviour?
Cheers
Andrea
Hi again
It was a polygon in the data which was destroyingmy picture.
Thanks for the help.
Rolf
aaime wrote:
RolfKristensen ha scritto:
This will only show the outline of the polygons.
as follows:
http://www.nabble.com/file/p12121998/2.png
However the output, I'm looking for, should look something like this:
http://www.nabble.com/file/p12121998/3.png
That is pretty much strange, the red color in the background
should be there only if there is:
* a big polygon that covers all of the area
* a linestring or multilinestring mixed among the multipolygons
that is being filled anyways as the SLD spec mandates (the
spec says that if a polygon symbolizer is applied to a linestring,
that one has to be closed and treated as a polygon fill wise).
If the latter is the case, you either avoid to mix different
geometry types in the same column (some databases allow this)
or you can use the following filter to make sure the fill is
applied only to polygons:
<Rule>
<ogc:Filter>
<ogc:Or>
<ogc:PropertyIsEqualTo>
<ogc:Function name="geometryType">
<ogc:PropertyName>geomColumn</ogc:PropertyName>
</ogc:Function>
<ogc:Literal>Polygon</ogc:Literal>
</ogc:PropertyIsEqualTo>
<ogc:PropertyIsEqualTo>
<ogc:Function name="geometryType">
<ogc:PropertyName>geomColumn</ogc:PropertyName>
</ogc:Function>
<ogc:Literal>Multipolygon</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Or>
</ogc:Filter>
<PolygonSymbolizer>
...
</Rule>
Hope this helps. If not, can you send me a sample of your data
so that I can try to reproduce this behaviour?
Cheers
Andrea
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