On 18.01.18 10:01, Martin Koppenhoefer wrote:
2018-01-18 6:14 GMT+01:00 Oleksiy Muzalyev
<[email protected] <mailto:[email protected]>>:
- deleting unnecessary nodes from a way (Shift-Y in JOSM) with
consequent verification of its geometry;
please do not use SHIFT+y (simplify way / DouglasPeucker) because it
doesn't know about the actual geometry, in particular sharp bends or
curves in general will get worse, it will reduce overall accuracy
(within the distance limit that you set/default, but ignoring angles).
You will achieve better results by adjusting the ways manually. IMHO
applying this algorithm to geometries other than those you added
yourself is an automated edit and should generally be discouraged.
There are some sensible usecases (serious "overnoding", particularly
intermediate nodes in straight lines), but for every longer way (more
than a screenfull in reasonable zoomlevel) you will typically not see
all the effects, hence it's an automated edit.
Cheers,
Martin
Martin,
You are absolutely right. The Simplify way, Shift-Y, in JOSM,
(Douglas-Peucker simplification) should be used only for own edits or
for undeniable over-noding, i.e. a short direct line consisting from
hundreds of nodes (probably from imports or kind of OCR editing).
Otherwise the lines and shapes will look angular.
I had to mention it myself. Thank you.
Best regards,
Oleksiy
osm: Alex-7
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