Hi all,
I've got some 2D KML generated by gdal_polygonize I'd like to turn
into 3D KML. Do you have any ogr2ogr techniques to do this?
A snip of my 2D KML:
------------------------------
<Placemark>
<name>1</name>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#out">
<SimpleData name="Name">1</SimpleData>
</SchemaData></ExtendedData>
<Polygon><outerBoundaryIs><LinearRing><coordinates>106.2125,-6.0
106.2125,-6.01 106.225,-6.01 106.225,-6.02 106.2375,-6.02 106.2375,-6.03
106.25,-6.03 106.25,-6.0
106.2125,-6.0</coordinates></LinearRing></outerBoundaryIs></Polygon>
</Placemark
------------------------------
And the desired 3D KML:
<Placemark>
<name>1</name>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>1</fill><color>ff0000ff</color></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#out">
<SimpleData name="Name">1</SimpleData>
</SchemaData></ExtendedData>
<Polygon>
<outerBoundaryIs><LinearRing><coordinates>106.2125,-6.0,101
106.2125,-6.01,101 106.225,-6.01,101 106.225,-6.02,101
106.2375,-6.02,101 106.2375,-6.03,101 106.25,-6.03,101 106.25,-6.0,101
106.2125,-6.0,101 </coordinates></LinearRing></outerBoundaryIs></Polygon>
</Placemark>
------------------------------
I've added a "z" to the coordinates (100 plus the "name" value, to boost
it above the terrain), plus a little bit of PolyStyle info to set the
fill color.
The long term solution may be to enhance gdal_polygonize to output 3D
vectors, but right now I'm just experimenting with visualizing KML in
Google Earth....
--
Best Regards,
Brent Fraser
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