[OSM-dev] [Merkaartor] elevation in nodes

[Stefan de Konink]

Chris Browet schreef:
> 
> 
> 2008/7/2 Stefan de Konink <skinkie at xs4all.nl <mailto:skinkie at xs4all.nl>>:
> 
>     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.

But I drive the road twice, would I get the road updated for examples 
moved in an X/Y direction and averaged the two traces out?


Stefan