[Talk-us] tiff, dwg and nad83
poppele at hm.edu
Tue Apr 17 08:29:59 BST 2012
Gregory Arenius wrote:
> "Imported data turns down potential new mappers."
> I really disagree with this statement. I think the mappers would be
> turned off if we didn't import it when available. "So you have all
> 250,000 address points for the city but instead of using them you'd
> rather us go collect all of them a second time?!?" Nobody is going to
> do that. Same with building outlines. It might be true for some data
> but I think its a largely inaccurate statement.
> There have also been some really well done imports such as the MassGIS
> one in MA. Not using that data isn't going to get us any further than
> using it. It makes our data much more useful, so it gets used, which
> brings in more contributors which....
> Maybe it would be different if there were no open data to import at
> all, then people would be more motivated to gather it so it would
> exist. However, if it does exist, weather or not we use it, that
> motivation is no longer there.
> I also think that in the US if government agencies are updating their
> data that we can use that we should look at that as part of the
> community. They're producing free data and so are we....I just wish
> they could use our data they way we use theirs.
> Talk-us mailing list
> Talk-us at openstreetmap.org
I totally agree with Frederik. Yes - imported data turns down new
mappers. Have you ever seen those monster
multipolygons ? I am sure a new mapper says: Forget that
I personally tend to stop my contribution to OSM because of the very bad
stuff I see when mapping:
Triple contours at the same position, double / triple nodes,
unconnected, tiny streams / rivers with a bunch tags.
In Albuquerque I - sorry - deleted 43 churches imported from geonames
all at the same spot.
I have dozens of examples like that. Tell us, how to fix this stuff. By
hand ? Waiting for better data ?
Writing better software ? Who merges old with new data ?
There is a philosophy of Importing and forgetting. For me most kind of
imports are some kind of vandalism.
Here are some examples:
Multiple streams / rivers
Nodes tagged waterway=river
Unconnected streams / rivers
Ten thousands of omported single trees in Europe
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