How did you get your real position assumption? From the aerial imagery in the background? It *may* be the one which is shifted. But also the opposite *could* be true: the OSM data is shifted (usually due to shifts in aerial imagery some years ago). The offset can vary between regions and even locally in case of mountains. Likely you want to compare to averaged GPS data (e.g. OSM-uploaded [OSM-uploaded GPS traces traces](//wiki.openstreetmap.org/wiki/Upload) or [strava](//wiki.openstreetmap.org/wiki/Strava) – quite some data in your area) as a reference. Unless you have that or know otherwise what's closer to the real position you should move (align) the aerial imagery (in your editor) to match the existing OSM data and then do your edits. Please see https://help.openstreetmap.org/tags/alignment/?sort=mostvoted and https://help.openstreetmap.org/tags/offset/?sort=mostvoted or https://wiki.openstreetmap.org/wiki/Using_Imagery for more info.

How did you get your real position assumption? From the aerial imagery in the background? It *may* be the one which is shifted. But also the opposite *could* be true: the OSM data is shifted (usually due to shifts in aerial imagery some years ago). The offset can vary between regions and even locally in case of mountains. Likely you want to compare to averaged GPS data (e.g. OSM-uploaded GPS traces or [strava](//wiki.openstreetmap.org/wiki/Strava) – quite some data in your area) as a reference. Unless you have that or know otherwise what's closer to the real position you should move (align) the aerial imagery (in your editor) to match the existing OSM data and then do your edits. Please see https://help.openstreetmap.org/tags/alignment/?sort=mostvoted and https://help.openstreetmap.org/tags/offset/?sort=mostvoted or https://wiki.openstreetmap.org/wiki/Using_Imagery for more info.

How did you get your real position assumption? From the aerial imagery in the background? It *may* be the one which is shifted. But also the opposite *could* be true: the OSM data is shifted (usually due to shifts in aerial imagery some years ago). The offset can vary between regions and even locally in case of mountains. Likely you want to compare to averaged GPS data (e.g. OSM-uploaded GPS traces or [strava](//wiki.openstreetmap.org/wiki/Strava) – quite some data in your area) as a reference. reference. Unless you have that or know otherwise what's closer to the real position you should move (align) the aerial imagery (in your editor) to match the existing OSM data and then do your edits. Please see https://help.openstreetmap.org/tags/alignment/?sort=mostvoted and https://help.openstreetmap.org/tags/offset/?sort=mostvoted for more info.

How did you get your real position assumption? From the aerial imagery in the background? It *may* be the one which is shifted. But also the opposite *could* be true: the OSM data is shifted (usually due to shifts in aerial imagery some years ago). ago). The offset can vary between regions and even locally in case of mountains. Likely you want to compare to averaged GPS data as a reference. Unless you have that or know otherwise what's closer to the real position you should move (align) the aerial imagery (in your editor) to match the existing OSM data and then do your edits. Please see https://help.openstreetmap.org/tags/alignment/?sort=mostvoted and https://help.openstreetmap.org/tags/offset/?sort=mostvoted for more info.

How did you get your real position assumption? From the aerial imagery in the background? It *may* be the one which is shifted. But also the opposite *could* be true: the OSM data is shifted (usually due to shifts in aerial imagery some years ago). Likely you want to compare to averaged GPS data as a reference. Unless you have that or know otherwise what's closer to the real position you should move (align) the aerial imagery (in your editor) to match the existing OSM data and then do your edits. Please see https://help.openstreetmap.org/tags/alignment/?sort=mostvoted and https://help.openstreetmap.org/tags/offset/?sort=mostvoted for more info.