Hi Frans.
In OSM in generally it's not a good advise to take GPS logs from the
device directly to push it into the map database.
But: Use your human mind to fix the measurement errors: a straight road
is a straight road, even if the trace says it's a zig-zag-line crossing
the straight connection repeatingly.
You ALWAYS have to do this manual postprocessing of traces, and that's
not due to your specific logging device.
Good strategies are:
- trace more than one log of the same route and manually use some kind
of average over all.
- trace intersections not by stopping in the middle and marking a
waypoint, but by crossing the intersection in both directions to get
crossing lines in the trace later.
- for fix points (like post-boxes, drinking water supply...) place the
device on top of it and measore for a while (some minutes). You'll again
get a blurred blob in the gpx trace with the jumping signal: use the
middle (and justify the whole stuff with roads etc).
regards
Peter
P.S.: Always keep in mind: relatively accurancy of the whole map - and
between the map features - is better than absolute accurancy of a few
elements, but post boxes mapped on the wrong side of the street.
Am 21.12.2011 09:59, schrieb Frans Thamura:
We use gps essential, and we got that waypoint is.not ideal to map, we
need extra effort.
That is. We need your wxperience work with bad way point to become
high quality map
On Dec 21, 2011 3:19 PM, "Kate Chapman" <[email protected]
<mailto:[email protected]>> wrote:
Hi Frans,
What do you mean by experience before and after? The differences in
the data? What people learned?
What is available at: http://tasks.hotosm.org/job/9 is the
instructions we gave people.
There wasn't any data available beforehand except a couple roads.
-Kate
On Wed, Dec 21, 2011 at 2:49 PM, Frans Thamura <[email protected]
<mailto:[email protected]>> wrote:
> hi all
>
> read about mapping in padang etc,
>
> can anyone share your experience, from before to after.
>
> so we can see the different of the valuable work.
>
>
> --
> Frans Thamura (???)
> Shadow Master and Lead Investor
> Meruvian.
> Integrated Hypermedia Java Solution Provider.
>
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>
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>
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