2008/7/2 Stefan de Konink <[EMAIL PROTECTED]>: > Chris Browet schreef: > >> Merkaartor will soon have a function to transform GPS tracks to OSM roads >> automatically. >> > > Does it have an update algorithm like Mapgenerator[1] so it is also > possible get more precise if there is more nmea data available over time? > > I didn't knew about Mapgenerator, so I don't know. The algorithm takes all the point from the nmea/gpx, compute possible roads from the last accepted node, then removes all previous points which are under about 10m of a possible straight road (hard to explain). So, yes, the more you have points, the more precise the road will be. I use 1 sec NMEA and the results are pretty good. Number of nodes is very reasonable and fits nicely to the track.
Actually, the extract function is already in SVN for a while (right-click on a Track layer -> Extract), just that upload is not possible right now. - Chris -
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