[OSM-talk] Stupid Josm question

[Gabriel Ebner]

On Sat, Jul 01, 2006 at 09:12:41PM +0100, Barnett, Phillip wrote:
> I'm obviously missing something obvious here, but given that my GPS tracks,
> loaded into josm and with the 'Draw lines between raw GPS points' option,
> produces beautiful looking roads  - why am I then painstakingly adding nodes
> and segments in an attempt to make an approximation of those automatically
> generated by josm? Yes, there will be patches that require cleaning up, but
> in the main, a lot of the groundwork could already be done if I could just
> get josm to upload the raw gps tracks as finished roads. The conversion into
> ways would still need doing manually, but the tracing of tracks is hugely
> labour intensive, particularly if you're trying for accuracy

Right click on the gps data layer, `Convert to data layer'.  The resulting
nodes however will have 'ele' and 'time' tags, and don't forget to remove the
waypoints before uploading.

> (btw, is approx 50 nodes for a 2 km stretch of minor country lane a bit
> excessive, or what you need for accurate map making, as I think it is
> ....?)

That's just 1 node every 40 meters, not that much if the road is curvy.  I
don't think that throwing away nodes for the sake of compactness is worth it,
that can be done ad hoc if that should be necessary, it's much more difficult
the other way.  So better leave them in and try to make it look good (round
curves).

  Gabriel.
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