Hi Nop, thanks for your email. I take your point, it would be difficult to delete and then we would be purely depending on the mapper's diligence. So yeah, I think I would rather use the suggestions given by Dan than advocate an auto track feature.
Regards, Shalabh On Mon, Nov 2, 2009 at 1:15 PM, Nop <ekkeh...@gmx.de> wrote: > > Hi! > > Shalabh schrieb: > > Given my limited understanding of mapping and even more limited >> understanding of computing, I think it would be better if JOSM assumed the >> trails to be correct and drew nodes on it on its own. >> > > This is possible combining several features. However, it is a bad idea, > most ways added this way are in horrible state and need correction. > > - way too many nodes. The API does not return more than 50000 nodes in one > request, so many tracks with 1500 nodes each quickly make it impossible to > download a sizable area > - the GPs is inaccurate. If you just stupidly add the track, all the > mismeasurements are added to the DB. While drawing the way, you can smooth > out the obvious zigzags of errors and deviations of known bad reception. > Also, as the distance of nodes (usually 1m) is way smaller than the basic > error of the GPS, it makes no sense to add this sort of misleading > pseudo-accuracy > - those ways are then unconnected to all other ways. It is very difficult > and tedious to create the proper connections > - most people who take this "easy way" don't connect and simplify the way > properly, you will often find ways that are simply created over existing, > manually edited versions of the same way. > > So in practice this doesn't work out. If you process your track properly, > it is quite some work either way, but using the track directly encourages > quick and sloppy adding of bad geometry. > > It has been suggested several times, that the possibility to do this > indirectly be removed from JOSM altogether and having corrected many bad > direct uploads I am rather in favour of this. > > bye > Nop >
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