There are so many places to get Census boundaries, but often for NYC, the layers from NYC Dept of City Planning BYTES of the Big Apple are the most detailed.
However, these boundaries do not contain fields to join with some of the more popular sources for Census variables, either for the the 2010 Decennial Census or the American Community Survey 5-year estimates.
It doesn’t take too much time to create the various fields, and as you can see in the examples, these are very similar with just a couple minor variations. The boundaries are available in the data catalog.
NYC Planning uses a seven character ID identifying tracts, the first digit is the borough ID and the remaining six are the Census Bureau defined tract ID which is good if joining to the tables created by NYC Planning only.
|Example||Borough ID||Tract ID|
|Example||State Code||County Code||Tract ID|
NHGIS uses a 14 character ID
|Example||Prefix||State ID||County ID||Tract ID|
Infoshare uses a 10 character ID
|Example||County ID||Tract ID|
The 2010 Tract boundaries can be joined with data from
- The 2010 Decennial Census
- American Community Survey (ACS) 5-yr estimates
(except ’05-’09 which uses the 2000 boundaries!)