Martijn and everyone,
A couple of years ago I did some research on named driveways that I was seeing in Virginia. County GIS officials told me that, in Virginia, any "driveway" with three or more residences had to have a name. TIGER had those names. So did the county maps. I know that sometimes TIGER names driveways and private drives with the name of the road that goes past that associated residence. Those probably should be considered errors. But in Virginia, at least (I don't know about other states), named driveways often are correct. Just something to think about when you're developing the Maproulette challenge. Best wishes, Charlotte Charlotte Wolter 927 18th Street #A Santa Monica, California 90403 310-597-4040 M: 310-663-3699 ________________________________ From: Martijn van Exel <m...@rtijn.org> Sent: Wednesday, February 13, 2019 12:04:53 PM To: Kevin Kenny Cc: Oisin Herriott (Insight Global Inc); talk-us Subject: Re: [Talk-us] Map roulette challenges - Missing named roads [VA, NJ, NY, MN, SC] I did a fair amount and noticed similar things — some of the suggestions concern private drives, others are not corroborated by available aerials. But I did find a decent ratio of fixable things, and as you go through the tasks, you get a better sense of which ones are likely to be fixable. The rest you can just mark as too hard or not an issue. As for TIGER fixing, I was inspired by Mike N’s posting about his TIGER fix up effort and figured you can use MapRoulette to do some of it. A comprehensive review of TIGER roads is probably best done using his Tasking Manager approach, but to review just the ‘main’ roads MapRoulette is quite usable. I created a challenge for Utah as a proof of concept and working my way through the tasks: https://maproulette.org/mr3/browse/challenges/3610 If you want to help out, great. If you want to recreate this challenge for a different area, let me know. The overpass query can easily be adapted. Martijn On Feb 13, 2019, at 10:31 AM, Kevin Kenny <kevin.b.ke...@gmail.com<mailto:kevin.b.ke...@gmail.com>> wrote: I've done some of the MapRoulette items for this project, but frankly I'm not that good at it. For the stuff nearest me, most of the missing roads are either too new to show on the orthos (which are updated on a rolling 4-year cycle) or else are old platted rights-of-way that are now abandoned. I find that I can't do much with them without boots-on-the-ground knowledge. I was therefore able definitively to dismiss a few of them with: "I've been there. There's no road," but that's been the exception rather than the rule. Finding that sort of thing in the MapRoulette items that I have taken on makes me wonder what sort of data quality we'll get out of this effort. Frankly, I've found TIGER review (and this part of the world is still very much a TIGER desert!) looks to be more fruitful. I find the NYSDOT database to be an extremely useful cross-check on names and purported alignments, though. Many ways shown in TIGER around here were digitized from pencil sketches of census workers and can be hundreds of metres from the actual locations, but NYSDOT usually has its information derived at least crudely from survey data. But perhaps I'm being too much of a perfectionist. On Wed, Feb 13, 2019 at 11:51 AM Oisin Herriott (Insight Global Inc) via Talk-us <talk-us@openstreetmap.org<mailto:talk-us@openstreetmap.org>> wrote: Hi, Thanks Kevin for the tip! I have updated the instructions to call out the NYS ortho online imagery layer to look at for the NY challenge. Also, after some more fiddling with the roads dataset for the project, I have also reduced number of roads to check and updated the New York challenge here: New York: https://maproulette.org/mr3/admin/project/2346/challenge/3593 Thanks again for the tip! Oisin Sent from Mail for Windows 10 _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org<mailto:Talk-us@openstreetmap.org> https://lists.openstreetmap.org/listinfo/talk-us _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org<mailto:Talk-us@openstreetmap.org> https://lists.openstreetmap.org/listinfo/talk-us
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