Hi Donal, Donal Hunt, 2017-04-27 16:26:
Re: http://area.jochentopf.com/fixing.html#spikes-buildings <http://area.jochentopf.com/fixing.html#spikes-buildings> I looked at one of the issues flagged (e.g. http://maproulette.org/map/2498/2186222) and don't really understand what the "spike" problem is. Are there examples of how to identify the issue? Are these issues only fixable in JOSM or can one use ID?
According to Jochen's description on the webpage a spike is a line which returns in itself. In the case you are asking for this line has zero length. There are three nodes in the way for this house which are at the same position. This can be visualized in JOSM using its built-in validator which detects duplicate nodes:
The house in the upper left of these nodes has the additional problem that it contains one of the twice, hence the zero-length spike:
I don't think that you can detect something like this in iD. But you can clearly see the ones with non-vanishing spikes (like http://maproulette.org/map/2499/2187301) in iD.
If you use iD my suggestion is to skip those without visible spikes and leave them to JOSM users.
Best Regards -- /Michael (osm:michael63) /
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