Opened 16 years ago
Last modified 12 years ago
#4582 closed defect
Overlapping Areas misreported — at Initial Version
| Reported by: | pinkduck | Owned by: | team |
|---|---|---|---|
| Priority: | major | Milestone: | |
| Component: | Core validator | Version: | tested |
| Keywords: | overlapping area way | Cc: | pinkduck, AM909, landwirt@…, moltonel, scai |
Description
With two closed ways representing two mutually exclusive areas, if both are separate there is no issue. If they share a single node at a vertex there is no validation report. However, if they share two nodes of a common edge then an 'Overlapping areas' validation 'Other'-type notification is given by the JOSM Validator plug-in.
When these two areas only overlap at their polygon borders I don't think there should be a validation notification raised. While there is a one-dimensional overlapping line of the virtual separation of a 2D surface, it tends towards zero given an infinitesimal approximation.
If there is any true overlap of the areas defined by the polygonal borders then this 'Other' notification is acceptable. This could be calculated using an algorithm similar to that described at: http://mathforum.org/library/drmath/view/63171.html. However, with the adaptation that parallel test edges should be excluded from determining the overlap. An obvious exception being when all nodes of each area overlap.
