Changeset: 49229995
Halvautomatiska tracerade skogar, andra objekt
Closed by Atakua
Tags
created_by | JOSM/1.5 (12275 en) |
---|---|
source | survey; Спутниковые снимки Mapbox |
Discussion
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Comment from Dalkvist
Hi please refine the auto tracing before adding more, the data is low in both accuracy and precision and it is not following local tagging practices.
There is basically no natural=wood in Sweden it is all part of active forestry so landuse=forest is the prefered tag this includes recently harvested/clear cut areas, they are sometimes tagged with natural=scrub as well.
Example[1][2] [3][4]
1) it uses 20+ nodes in a zigzag pattern when the border is straight.
2) it is offset in a lot of places, looks like the mapbox data changes offset in the area.
3) clear cuts that are outside/excluded
4) it handles the scrub in power line areas badly
5) when the forest ends at the water's edge it is recommended that they share nodes or segments
Is there a way to lower the node count? The amount of nodes gives a false impression of accuracy and makes it harder to clean up/improve.
After dealing with bad corine imports most of us are vary of semi-automatic stuff.
[1]https://osm.org#map=17/58.93891/16.49445
[2]http://i.imgur.com/0qHwOdv.png
[3]https://osm.org/#map=16/58.9421/16.5373
[4]http://i.imgur.com/RDpi9zV.png -
Comment from Atakua
Hej, tusen tack för din feedback!
>There is basically no natural=wood
Jag kommer att använda landuse=forest istället från och med nu. Det var oklart för mig förut.Ang. 2): jag ska kolla att gränser mellan tracerad yta och bilder stämmer bättre utan avståndet.
Ang. 3), 4): också ska jag rensa data bättre i framtiden.> Is there a way to lower the node count?
Jag änvander redan filterer ("simplify area" och "simplify line") innan jag börjar manuel redigering. Ändå man kan ändra filter-inställningar så att linjer har till och med mindre punkter.Ang. 5): jag ska använda ContourMerge plugin för att slå ihop gränser — då ska det vara enkelt.
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