Pretty much self-explanatory. I see the whole network of roads slightly misaligned with the satellite picture in the background (buildings also). I would start aligning them but it seems like such a generalized issue that I'm not sure if fine-grained editing is the correct solution.

asked 15 Jan '14, 15:00

gdiazc
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accept rate: 0%

edited 15 Jan '14, 15:35

aseerel4c26 ♦
32.2k16239552


That seems to be "the" standard problem with aerial imagery (and multiple sources in general).

See e.g. bing-osm-and-my-waypoints-all-misaligned-who-do-i-trust or the others listed under the same tags (click on the grey words below the question and sort by vote count).

Preliminary advice: Do not move the existing OSM data to match the aerial imagery unless you are quite sure. We need to know the reality – find it out, somehow. Aerial imagery is not necessarily close enough (by today's standards) to the real position. The other way round: OSM data is not necessarily close enough (by today's standards) to the real position.

For discussing (evidence, hints, measurements, observations of) this specific problem the forum is likely the better place (at least for same questions regarding other locations).

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answered 15 Jan '14, 15:38

aseerel4c26 ♦
32.2k16239552
accept rate: 18%

edited 15 Jan '14, 15:41

To answer "How can a problem like that be solved?", once you've figured out (from a combination of various sources and local knowledge) how offset imagery is in a certain place, you can align the imagery in the editor. This varies editor by editor - for example, iD has a "fix alignment" option on the background menu.

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answered 15 Jan '14, 16:12

SomeoneElse ♦
33.1k65343780
accept rate: 16%

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question asked: 15 Jan '14, 15:00

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