[OSM-dev] [OSM-newbies] URL for mobile binary protocol

Robert (Jamie) Munro rjmunro at arjam.net
Thu Mar 20 11:41:21 GMT 2008


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Jason Dent wrote:
| I have a mobile map application.  I have found that directly accessing the
| tile server works the best.

The downloads are HUGE! Some people have to pay per kB for mobile
downloads. Also, you can't rotate and reproject the tiles, or give a
sat-nav type 3d view, without horribly distorting the text. If you want
to highlight a road or a point, you have to download the map details anyway.

| Trying to draw all the map details at runtime
| on a PDA is a bit much.  It can be done, but pre-cooked tile are much
| better.

It's not "a bit much". *All* commercial sat-navs do it. When you
consider how much more CPU power a modern PDA has than a PC of 15 years
ago, and think about the kind of thing those PCs did (Doom, for example)
drawing a map is easy.

Robert (Jamie) Munro
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