http://www.slideshare.net/steve8/what-id-like-to-do-with-mapnik-4756837
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icon rotation: could also be used for amenity=viewpoint when tagged with viewing angles
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SVG icons: allow replacing colors (e.g. color a black icon in blue); have an alpha parameter(done) -
move icon a bit if it would collide with others
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replace an already placed icon with a collection icon when there is another one to be shown right there
- unlikely to implement this, as it is better done as a (zoom dependent) pre-processing step before mapnik
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push lines apart so that there is a minimum distance between them(nearly done) -
be able to construct file names from tag values in XML (e.g. "symbol_file=parking.svg" should be mapped to e.g. ~/mapnik/parking.svg or http://example.com/parking.svg). Right now, people resort to generating XML styles by a script.(done, see "PathExpressions") -
when there is a very curvy road, place the name along a smoothed line (when the text is not centered to the line but with a dy) (nearly done)
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multi-line text constructed from several tags, e.g. for peak name and height (can be done when you accept the same styling for these text fragments) -
stronger coupling between icon and text (maybe similar to the ShieldSymbolizer?) so that manual text dy tweaking is not required anymore (want to be able to say: "place this icon in size 20x20 and put the text in size 12pt five pixels below it") Idea: “TownSymbolizer”.
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collapsing of little small areas with the same tags into a single big one (for e.g. a big forest), so that e.g. the name is drawn only once
- unlikely to implement this, as it is better done as a (zoom dependent) pre-processing step before mapnik
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be able to suppress automatic text rotation (per style or layer) - contour lines should always be displayed so that the base line of the text points to the lower ground
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underlined text (for e.g. capitals)
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sometimes, peak names drawn in a half circle, would be cool if Mapnik could do that as well