[Talk-us] [Talk-us-newyork] LAST CALL: Looking to start on reconciling New York City admin boundaries

isstatenisland at tutanota.com isstatenisland at tutanota.com
Wed Jun 1 02:10:19 UTC 2022


I agree, coastlines should not be merged with political boundaries. In this case the political boundaries are based on the coastline in nineteen-hundred whatever, pre-GPS. Coastline in OSM should refer to where the coast actually is and political boundaries should not move.

Also, I see the Marble Hill boundary is wrong. The Manhattan-Bronx boundary should run in the bottom of the hill (former path of the river) and through several buildings.

Maybe the tax map data is of some help?
https://data.cityofnewyork.us/Housing-Development/Department-of-Finance-Digital-Tax-Map/smk3-tmxj

Taking a second look... the data there also has problems. Some water areas belong to two lots in two different boroughs.

I'm not convinced New York City even knows its exact borough boundaries. (Just look at Ellis Island: New York City's tax lot extends over portions of New Jersey's part of the island and waters. Other Hudson River lots also spill into the NJ side of the river)

Good luck.

-- 


May 24, 2022, 17:16 by kevin.b.kenny at gmail.com:

>
>
> On Tue, May 24, 2022 at 11:43 AM Marcel Dejean <> mrd79 at case.edu> > wrote:
>
>> The Manhattan borough boundary is from the same import that had the neighborhood boundaries which I deleted a year or so ago. It ought to be deleted and the county boundary reused. I'm not sure about the other boroughs, but it sounds like they're just as bad.
>>
>
> They are indeed just as bad.  (Uhm, Queens is worse- the imported boundary excludes some inhabited areas of the borough.)
>
> The same import also has some weird boundaries labeled "territorial waters" that don't close, don't align to baseline, coastline, 3-geographic-mile limit, or 12-nautical-mile limit. I'm going to delete them as well, at least in the areas where they're glued to political boundaries.
>
> The neighborhood boundaries in Queens are well defined - all the locals know where Corona ends and Flushing begins - so I wouldn't object if someone wants to maintain them. They were political boundaries until 1898, and things like 'postal cities' mostly still follow them. But I'm not likely to do it.
>
> I might redo the community board boundaries from NYC GIS, but it's not a high priority for me. I got started on this because the Adirondacks and the Niagara Frontier had no political boundaries at all in OSM. When I got to where there were political boundaries, I saw they were all misaligned, sometimes by a km or more.  It's turned into a project of redrawing all 1600 municipalities (which, of course, incidentally redraws alletim  because I find imported misinformation everywhere I look. 
>
> Thanks for the confirmation that the imported junk is indeed junk.   I'll tidy it up in the places where I'm working.
>
> As I move down into Queens and LI, I can supplement the work with strong local knowledge - I was born in Far Rockaway.
> -- 
> 73 de ke9tv/2, Kevin
>

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