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We would like to print maps using Mapnik. The SVG export seems not to be perfect, but PNG is nice - the only problem is the low resulution. Is there an "easy" way to export in a around 300dpi instead of screen resolution? Basically in the OSM Mapnik stylesheet all values are pixels. Using the scale parameter in the TileMill project file, caused strange results. |
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This may be no complete answer - but hopefully still good help: You could search the web for tiles retina - it is quite a similar (same) problem for high-resolution displays (popular through Apple's high-resolution displays, named "retina"). http://openstreetmap.at/content/hires is a good example of high-res tiles. A search for high-res tiles openstreetmap is also promising. ;-) Also see our wiki entry on printing. If you want to print OSM for personal use - did you try the pdf version of the export tab on our main map page? |
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Explain "strange results" - I use the --scale-factor parameter on nik2img and I believe that should do the same as TileMill's scale parameter. Of course you have to adjust the output size accordingly; if you specify --scale-factor 4 and want the same detail then you need to quadruple your width and height as well. 2
Actually it looks like this strange results only happen in the tile view in TileMill. When I export it is actually all fine, as long as I zoom in more according to the current scale.
(16 Dec '12, 14:04)
AddisMap_Ale...
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Interesting feature requests in tile mill: https://github.com/mapnik/mapnik/issues/1582 https://github.com/mapbox/tilemill/issues/1819