[OSM-dev] [Merkaartor] elevation in nodes

[Chris Browet]

2008/7/2 Stefan de Konink <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.

- Chris -
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/dev/attachments/20080702/51d78702/attachment.html>