Re: [Talk-us] NYC administrative boundaries and Nominatim
On 7/30/12 5:11 AM, Kevin Kenny wrote: On 07/29/2012 11:56 PM, Skye Book wrote: Do we have a source for NYC administrative boundaries? http://www.nyc.gov/html/dcp/html/bytes/districtsmetadata.shtml there also should be boundaries in TIGER. most of the problems i've seen with nominatim and boundaries have to do with half-assed boundaries based on the USGS stuff. i've been gradually replacing boundaries in the capital district with TIGER based boundaries which are much better. i have no opinion on the boundaries in the nyc.gov site, it might be worthwhile to compare them with the boundaries from tiger. i can probably give you .osm files based on the tiger boundaries if you want them for that purpose. it'd be good to look at the spot where nyc boundaries end and match them up with the tiger boundaries to see how good the fit is. richard ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] NYC administrative boundaries and Nominatim
On Mon, Jul 30, 2012 at 5:11 AM, Kevin Kenny kken...@nycap.rr.com wrote: On 07/29/2012 11:56 PM, Skye Book wrote: Do we have a source for NYC administrative boundaries? http://www.nyc.gov/html/dcp/html/bytes/districtsmetadata.shtml I'm not sure of the license situation with any of the NYC.gov datasets. I've gotten different answers from different people I've talked to. Some people in some offices say that it's fine as long as we take certain steps, others say it's not, and others have different views altogether. I'm working to get some authoritative data on this. While I'm generally not a big fan of imports, administrative boundries are hard to do in another way, and as Richard Welty points out, it's generally a good thing to replace these nodes with true polygons, and then we can also use data sources to fill in population tags. And what are boroughs in terms of place? I'm thinking county- though that's not right. Certainly the populations should be added. The boroughs of New York are counties; confusingly, the borough names and the (coterminous) county names don't always match: BoroughCounty The Bronx Bronx County Manhattan New York County Staten Island Richmond County Brooklyn Kings County Queens Queens County Indeed that is confusing. Off the top of my head, I see two simple solutions: 1. We tag the areas as counties, but use the common names as the primary name, and these official names as alt_name. 2. We create a new administrative relation that has the same geometry as the county. I would lean towards the first, as it means less data and more clarification. Thoughts? - Serge ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
[Talk-us] NYC administrative boundaries and Nominatim
Hi all, I'm going to discuss this with the local NYC community (some of which are on this list) but I'm going through NYC and I'm looking for things that aren't right. I've tried to do some nominatim queries and the results have been frustrating at best. Some of these appear to be TIGER related, some Nominatim related, but the result is pretty awful. Let's begin two symptoms, then we can drill down: 1. Brooklyn doesn't show up in Nomiminatim, at all. To put this in context, Brooklyn is the most populated borough of NYC, with a population of 2.5 million people, and it doesn't show up when doing a search. 2. Manhattan shows up, twice, but only after places like Manhattan, Montana. Manhattan is New York, New York- and the most densely populated borough in New York. It's also major business and cultural hub known around the world. 3. The other boroughs also show up twice, as islands and hamlets. This is wrong, of course, but at least they show up on a search. So, what comes up when you look for Manhattan are two place IDs: http://nominatim.openstreetmap.org/details.php?place_id=3137519 http://nominatim.openstreetmap.org/details.php?place_id=520672 Those are two nodes, one claiming Manhattan is an island, the other claiming it's a hamlet. Perhaps we need a proper administrative boundry for the borough? Brooklyn, I did find reference to in the NYC place ID: http://nominatim.openstreetmap.org/details.php?place_id=128848728 But for some reason it didn't show up in the search! Do we have a source for NYC administrative boundaries? And what are boroughs in terms of place? I'm thinking county- though that's not right. Certainly the populations should be added. Thoughts? - Serge ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] NYC administrative boundaries and Nominatim
Brooklyn actually does come up way down in the Nominatim list.. I think part of the confusion may be that this is technically Kings County (which renders invalid the possibility of using the administrative level of county as the key for the boroughs). Boroughs are somewhat unique beasts to New York I think. Each Borough has a president, a Borough Hall and it's own very well defined boundaries. Categorically speaking they are under county in terms of land mass but for recognizability the boroughs - and their politicians and administrative errata - are both more visible and recognizable to most people. If anyone knows of anywhere with a similar situation I'd be very interested to see how that place is structured and defined. On Jul 29, 2012, at 11:47 PM, Serge Wroclawski emac...@gmail.com wrote: Hi all, I'm going to discuss this with the local NYC community (some of which are on this list) but I'm going through NYC and I'm looking for things that aren't right. I've tried to do some nominatim queries and the results have been frustrating at best. Some of these appear to be TIGER related, some Nominatim related, but the result is pretty awful. Let's begin two symptoms, then we can drill down: 1. Brooklyn doesn't show up in Nomiminatim, at all. To put this in context, Brooklyn is the most populated borough of NYC, with a population of 2.5 million people, and it doesn't show up when doing a search. 2. Manhattan shows up, twice, but only after places like Manhattan, Montana. Manhattan is New York, New York- and the most densely populated borough in New York. It's also major business and cultural hub known around the world. 3. The other boroughs also show up twice, as islands and hamlets. This is wrong, of course, but at least they show up on a search. So, what comes up when you look for Manhattan are two place IDs: http://nominatim.openstreetmap.org/details.php?place_id=3137519 http://nominatim.openstreetmap.org/details.php?place_id=520672 Those are two nodes, one claiming Manhattan is an island, the other claiming it's a hamlet. Perhaps we need a proper administrative boundry for the borough? Brooklyn, I did find reference to in the NYC place ID: http://nominatim.openstreetmap.org/details.php?place_id=128848728 But for some reason it didn't show up in the search! Do we have a source for NYC administrative boundaries? And what are boroughs in terms of place? I'm thinking county- though that's not right. Certainly the populations should be added. Thoughts? - Serge ___ 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
