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You should read the whole thread of http://thread.gmane.org/gmane.comp.gis.gdal.devel/38725. Test image was an aerial photo (424 MB) and methods with best compression were: Lossless JPEG2000 (197 MB) DEFLATE compression with PREDICTOR=2 (280 MB) LZW compression with PREDICTOR=2 (307 MB) However, your images seem to suit very well for LZW compression and ...


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In addition to what AndreJ said, it might help to use osmconvert to determine which objects are large enough to be displayed at a requested zoom level. The --add-bboxweight-tags will help you: --add-bboxweight-tags This option will add the binary logarithm of the bbox area of each way and each relation. For example: <tag ...


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I suggest to go through the Mapnik style definition file. These can be: osm.xml including all files in the inc subfolder (Old style) CartoCSS stylesheets (Current style) the rendering rulesets of Maperitive Look out for the items that are used for low levels, and keep those. For the zoom levels 0 to 5, Mapnik uses coastline shapefiles and Natural Earth ...



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