[Talk-us] Georgia USGS import quality issues

[Minh Nguyen]

Vào lúc 22:38 2021-02-15, Mateusz Konieczny via Talk-us đã viết:
> Note that Import Guidelines required discussion and documenting import
> also then: 
> https://wiki.openstreetmap.org/w/index.php?title=Import/Guidelines&oldid=211128 
> <https://wiki.openstreetmap.org/w/index.php?title=Import/Guidelines&oldid=211128>
> (this link to state of that of page at time of making that edit)

Back in those days, sufficient community consultation could sometimes 
involve two people discussing an import on a wiki talk page. But it 
doesn't even look like that happened; all I can find is a note after the 
fact. [1]

> If import was not discussed it is OK to remove whatever it added 
> (though, after 12 years
> an automated revert may not be feasible).

The import is getting more attention now than it apparently did back 
then. Even if it was adequately discussed at the time, the dataset 
hasn't aged well, so a systematic cleanup is well-justified.

> BTW, large parts of that were deleted already 3 and 5 years ago with 
> changeset
> comments mentioning low data quality.

Also, the ARC LandPro dataset replaced the USGS landuse/landcover import 
in Metro Atlanta. [2] That happened the very same year as the USGS 
import, demonstrating that a little more upfront discussion probably 
would've resulted in a better import.

If the MapRoulette challenge turns out to be too large for interested 
mappers to efficiently complete, other regional planning commissions may 
maintain similar datasets that can replace the USGS data in new imports 
(fighting fire with fire, as the saying goes).

[1] https://wiki.openstreetmap.org/wiki/Special:Diff/247411
[2] https://wiki.openstreetmap.org/wiki/LandPro08

> Feb 16, 2021, 01:24 by m at rtijn.org:
> 
>     Hi all.
> 
>     While cleaning up some TIGER data in Georgia, I came across a number
>     of land use polygons that seem to have resulted from a USGS import
>     that looks to have happened about 12 years ago. Here is one of the
>     changesets: https://www.openstreetmap.org/changeset/660316
>     <https://www.openstreetmap.org/changeset/660316>
> 
>     There is a reference to this import on the Georgia wiki page:
>     https://wiki.openstreetmap.org/wiki/Georgia_(U.S._state)#Land_Use
>     <https://wiki.openstreetmap.org/wiki/Georgia_(U.S._state)#Land_Use>
>     . The user (Liber) does not seem to be active any longer, but I
>     haven't contacted them yet.
> 
>     This Overpass query suggests that there are almost 4000 ways with
>     the identifying source tags: https://overpass-turbo.eu/s/13xi
>     <https://overpass-turbo.eu/s/13xi> . Many of the examples I came
>     across are of dubious quality. Either there is little relation to
>     ground truth, deprecated tagging is used, or both.
> 
>     I raised this in #local-georgia on Slack, but local mappers there
>     are not familiar with the import.I created a MapRoulette Challenge
>     to look at these one-by-one, but the community may prefer a
>     different approach?https://maproulette.org/browse/challenges/16952
>     <https://maproulette.org/browse/challenges/16952>https://maproulette.org/browse/challenges/16952
>     <https://maproulette.org/browse/challenges/16952>https://maproulette.org/browse/challenges/1695
>     <https://maproulette.org/browse/challenges/1695>. What are your
>     thoughts on how to proceed?
> 
>     2
> 
>     Martijn
> 
> 
> 
> 
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-- 
minh at nguyen.cincinnati.oh.us