Another thing I noticed with the GNIS data is that it doesn't seem to distinguish between airports and helipads. There was an airport in the middle of my city and I wondered where in the world that data came from. Turns out the coordinates were off by a mile which didn't help but it is actually a hospital helipad.
As for airport density, I did notice a lot of them out in western Kansas when I was tagging exits along I-70. I'm guessing a lot of them are pretty small airstrips for crop dusting and such. Not sure if they should be rendered at zoom level 10 or not. I mean it's not like there is a lot of other stuff that needs rendering at zoom level 10 in western Kansas... :) Toby On Tue, Jun 15, 2010 at 10:59 AM, Alan Millar <a...@bolis.com> wrote: >> Either the US has a much greater density of airfields/airports than >> other parts of the world, > > I don't know about that. > >> many airfields/airports have yet to be mapped in >> other areas of the world, > > Yes, definitely. > >> or the GNIS import brought in a bunch of airfields >> that are no longer in operation. > >> Has anyone noticed a bunch old airfields in their area created by the > GNIS >> import that really shouldn't be on the map. > > I don't know if it is a bunch, but they certainly are there. I did a > little research last year, and it looks like the GNIS list came from an FAA > list. It appeared to include such things as clearance requested and > granted for airstrips but never built, and former airstrips that have since > been replaced by new construction. > >> All I know is that when I look >> at the aerial imagery where some of these airfields/airports are > supposed to >> be, all I see is a field. Could be that it's just a grass runway?. > > Those do exist. Whether they merit inclusion on the map is subjective. I > think the large/medium/small size suggestion is a really good idea. > >> In my >> town there's one airport that's supposedly in the middle of the golf >> course. > > There are some golf resorts with their own airstrips. But if you know the > area, and know there is a golf course there and no airstrip, by all means > feel free to fix the map and delete the obsolete airport item. > > Thanks for keeping an eye out for this stuff. > > - Alan > > -- > Alan Millar a...@bolis.com > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-us > _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
