[FWTools] ogr2ogr shp --> kml conversion failing on some complicated polygons

[Bryan Keith]

Lennox,

I got your suggestion to work for polygons that weren't giving me 
problems, but it did not change anything for the problematic polygons.

Bryan

Lennox Antoine wrote:
> You are probably experiencing a tesselation problem. Here is a polygon
> template I normally use for filling complex polygons in GE. Note the
> tesselation attribute, and how to use it.
> 
> <Polygon>
>   <extrude>0</extrude>
>   <altitudeMode>clampToGround</altitudeMode>
>   <tessellate>1</tessellate>
>   <outerBoundaryIs>
>      <LinearRing><coordinates></coordinates></LinearRing>
>   </outerBoundaryIs>
> </Polygon>
> 
> <Style>
>   <LineStyle>
>     <color></color>
>     <width></width>
>   </LineStyle>
>   <PolyStyle>
>     <fill>1</fill>
>     <color></color>
>   </PolyStyle>
> </Style>
> 
> -Lennox
> 
> On 4/8/07, Bryan Keith <bryan at geomega.com> wrote:
>> Hello,
>>
>> I have a shapefile with a single record, a polygon shape.  I tried
>> attaching the shapefile to this e-mail, but the server didn't like it.
>> I'll gladly e-mail the shapefile to anyone who's willing to look into
>> this.  It's ~722KB.  I can convert the shapefile to kml like this:
>>
>> ogr2ogr -f kml testblm_py.kml testblm_py.shp
>>
>> When I look at the kml in Google Earth, it looks fine.  The outline of
>> the shapefile shows up as a red line which, I guess, is the default for
>> ogr2ogr kml output.  However, I want to see filled polygons so I replace
>> part of the "style" line in the kml like this:
>>
>> cat testblm_py.kml | sed "s/<fill>0<\/fill>/<color>ff37d9f0<\/color>/" >
>> testblmfill_py.kml
>>
>> The shaded area does not show up correctly in Google Earth.  It shows up
>> as lots of vertical striped areas within the polygon.
>>
>> My actual workflow is a fair bit different from what I've described
>> here, but I've tried to boil the problem down to a simple example.  I
>> realize, however, that this polygon is not simple.  I'm processing over
>> 10000 land ownership polygons in Utah, and I'm only having a problem
>> with a few of the big, complicated polygons.
>>
>> I'm wondering if it might be a problem with the line length in the kml,
>> but I'm not sure.  I'm still doing some testing.  Any ideas are
>> appreciated.
>>
>> Bryan
>>
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>