initialize to reasonable values.
initialize to reasonable values.

tomhughes/mapnik,mapnik/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,mapnik/mapnik,lightmare/mapnik,tomhughes/mapnik,mapnik/mapnik,naturalatlas/mapnik,naturalatlas/mapnik,tomhughes/mapnik,mapnik/mapnik,tomhughes/mapnik,lightmare/mapnik,lightmare/mapnik,lightmare/mapnik