Basic validation on upload

[bussed]

It would be nice to have some sort of (basic) validation before a changeset gets uploaded.

Perhaps

• self intersecting ways
• single node in way (not easy to produce but possible)
• unconnected roads (within x meters)
• ...

iD puts a lot of effort to avoid those bugs from the beginning. This is a wise design. But in the end users can produce "buggy" changesets (although harder as in josm...).

[tmcw]

We've added a number of validations already in iD. Not sure if 'self intersecting ways' is necessarily wrong. iD will not generate single-node ways. Unconnected ways are possible to detect but significantly more difficult than the other types of validation - please create a ticket just for that.