[OSM-dev] [Merkaartor] elevation in nodes

[Chris Browet]

2008/7/2 Stefan de Konink <skinkie at xs4all.nl>:

> 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?
>

No, my algorithm doesn't go that far...  But it's a nice idea, though.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/dev/attachments/20080702/673d643d/attachment.html>