[OSM-dev] Slippy Map, automatic Tile Rendering

Robert (Jamie) Munro rjmunro at arjam.net
Fri Jan 19 13:45:12 GMT 2007


OJW wrote:
> On Thursday 18 January 2007 11:18, Thomas Walraet wrote:
>> They could render one more tile at level 12 dedicated to the lowest
>> zoom. It should draw primary and secondary roads very large, display
>> name only for major cities, rails with just one black line, etc.
> 
> I'm wondering whether one of those "erode/dilate" filters you find in raster 
> graphics programs (e.g. imagemagick) would make the roads easier to see 
> against a white background, for low-zoom tiles?

It might 'work', but it will never be anything like as good as actually
rendering the stuff bigger in the first place, so that no line is less
than 4 pixels wide etc. When you scale that down, it will anti-alias
beautifully.

Robert (Jamie) Munro


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