[Talk-us] Merging NYC buildings

Reilly, Colin creilly at doitt.nyc.gov
Fri Sep 19 13:49:46 UTC 2014

No, unfortunately we cannot but I haven’t given up on my attempts to gain clearance.

However in this case the imagery doesn’t really help. See link below which gives you a general idea of what we see internally. Note the shade cast by the building to the east. In this case it was the tax parcel and multiple address that indicate two buildings not one.



From: Katie Filbert [mailto:filbertk at gmail.com]
Sent: Friday, September 19, 2014 9:36 AM
To: Reilly, Colin
Cc: talk-us at openstreetmap.org
Subject: Re: [Talk-us] Merging NYC buildings

On Fri, Sep 19, 2014 at 3:19 PM, Reilly, Colin <creilly at doitt.nyc.gov<mailto:creilly at doitt.nyc.gov>> wrote:
I’ve also see buildings merged that may appear to be one building from above but are in fact two.

Do you have better imagery that we would be able to use? I think that would help in this case.


A single building cannot straddle two tax parcels. In general, visual information in NYC is sometimes not enough to warrant a change. Example below of a building with two separate address points sitting on two separate tax parcels that was merged when it should not have been.

The intention of this email is to inform the group. I’m sure you can all imagine the challenges in managing data in Manhattan. Often multiple sources are necessary to validate changes.



Colin Reilly
Director, Geographic Information Systems
New York City Department of
Information Technology & Telecommunications

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Katie Filbert
filbertk at gmail.com<mailto:filbertk at gmail.com>
@filbertkm / @wikidata
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