Hi!
I have some problems with raster rendering in Mapnik2. I'm trying to render
some large semi-transparent paletted PNG images (hillshade layer, 4 files for
each zoom level: nw, ne, sw, se; levels from 1 to 11, whole world rendering).
PNG part of XML (for example):
<Style name="nw_zl06">
<Rule>
<RasterSymbolizer opacity="1.0" mode="multiply" scaling="bilinear8"
filter-factor="-1" /></Rule>
</Style>
<Layer name="nw_zl06">
<StyleName>nw_zl06</StyleName>
<Datasource>
<Parameter name="type">gdal</Parameter>
<Parameter name="file">/home/mapnik/raster/nw_zl06.png</Parameter>
</Datasource>
</Layer>
First problem. At the 6th level get an error: 'Segmentation Fault'. I think,
it's because of Mapnik trying to put a whole bitmap in the memory. Am I right?
And I think it's no good idea to put all big image in the memory. GDAL doesn't
do this.
Second issue. At several zoom levels I get dark tiles without hillshade (not
whole world, but 3/4 part of it). I don't know why...
So, I need any assistance to solve this problems.
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