[Talk-ca] CanVec Reverts

[Michael Reichert]

Hi Sam,

Am 01.09.2016 um 23:06 schrieb Sam Dyck:
> I received the following changeset comment from Nakaner for a Canvec import
> (changeset
> 38158126) at 15:55 Central Time (20:55 UTC):
> 
> "This changeset has uploaded data which does not fit to each other. There
> is an offset between the water areas and the forest areas. Example:
> https://www.openstreetmap.org/way/406539219
> 
> Could you please fix this?"
> 
> I believe the given what we have just spent the last 24 hours discussing
> this request is unreasonable and the issue is not significant. Thoughts?

If you have a proper look at the whole area around, you will see that
there is a systematic offset between the water "layer" and the forest
layer. The forest layer should be moved about 10 to 30 metres to
northwest. I wonder how such an error can be overseen during the
preparation of this tile.

Other examples:
https://www.openstreetmap.org/way/402043390
https://www.openstreetmap.org/#map=16/49.3997/-87.4329

Maybe the original data was traced from different aerial imagery and
that's why there is an offset which is not constant.

Best regards

Michael


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