Changeset: 56438755
add multiple buildings and areas
Closed by tychoanomaly
Tags
changesets_count | 10 |
---|---|
created_by | iD 2.6.1 |
host | https://www.openstreetmap.org/edit |
ideditor:walkthrough_progress | welcome;building;startEditing |
ideditor:walkthrough_started | yes |
imagery_used | Bing aerial imagery |
locale | en-GB |
Discussion
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Comment from Constable
hi there, what's your source for this building https://www.openstreetmap.org/way/561986995 ? Looks like you used bing imagery but I can't see it on bing.
Someone opened up this note as well https://www.openstreetmap.org/note/1303530, do you mind having a look?
thanks -
Comment from freebeer
ciao constable,
I don't know if iD would keep track if a user changes for a specific item to Texas Orthophoto, where it is visible.
However, there is a significant offset if one attempts to carefully trace the imagery, to the northeast of TX Ortho.
Interestingly, the nearby buildings to the north have a similar offset to the northwest compared to the TX Ortho background.
This building has about 12m offset while the road shows only 6m. This leads me to suspect an inaccurate GPS survey notes, or at worst, guess-estimation.
Some Texas GIS services are known to have a noticeable offset from TX Ortho when added to OSM. I'm probably not going to bother to see if a google aerial background matches this offset in which case we'd cry out against their terms of use.
By the way, the buildings to the north were added by the same user, so they are probably misaligned to the inaccurate Bing/DG satellite instead of the better TX Ortho aerials, and as such I would believe the user added this particular building and way without knowing about TX Ortho, guessing on the Bing background, and so that it is thereby inaccurate. -
Comment from Constable
Hi there, cool, if you see it on TX ortho I'm fine with that.
Thanks
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