Mismapped roads leading to mismapped everything

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I don’t know the scale or how to correct this.

Some 14 years ago, someone put some traffic calming cushions onto some roads in South London, eg node 1631410005, and I think this has resulted in the road (Uplands Road) going from being straight to a little bit bendy. (Source: Cadastral Parcels). Correcting this is not difficult, the houses on either side are approximately correct but some trees are a little wayward and need moving.

However, the same traffic calming cushion added at node 33149099 has moved St Aiden’s Road so that the trees and houses on both sides of the road that have been added afterwards are now definitely in the wrong place, though moving them isn’t too difficult as they are very well mapped relative to the road. Correcting the road at the north end is a bit harder as it means moving the pub which would inconveniently be in the middle of the road now.

Dunstan’s Road is also in the wrong place. Rydale Road is in the wrong place (no houses, but trees where the houses should go).

I’m not sure of the limits of this and I think it’s a bit beyond my paygrade! Can someone advise what should I do?

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I had a quick look and the alignment of those roads is a bit out. That’s often the case with features which were mapped using older aerial imagery and without the benefit of alignment hints to which we now have access.

Assuming that you’re using the iD editor, you can use the “OSMUK Cadastral Parcels” overlay layer as a guide to alignment. You might need to adjust the offset of the Bing aerial imagery slightly, so that property boundaries align with the overlay.

Once you’ve realigned roads, you will probably have to shift some buildings as well. It’s a bit tedious, but hopefully you’ll only have to do it once.

[EDIT: I’ve made a start on realigning some of the features in the area, hope that helps]

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Thank you, both for the advice and the realignments! Nice hearing instructions with what I thought I should be doing too.

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