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Data from NYC Open Data via the Socrata Discovery API. Quality scores are computed from a sample and are indicative, not authoritative.
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TAX_LOT_POLYGON

i38t-6if2City Government16 columns
This polygon-based spatial data represents the shape, location, and identity of Tax Lots in the Digital Tax Map Collection . • Updates: Data is extracted from DOF’s internal system on the last Friday of each month and refreshed on ArcGIS Online on the 1st. The online map always shows the most recent version. • Accessing the Data: • Digital Tax Map on NYC Open Data: See the complete collection . • Individual layers: Downloadable from the Digital Tax Map Feature Server . Note: To ensure reliability, the Tax Map alternates between Set A and Set B each month. If one set has issues, the previous month’s copy remains online. Both sets are kept about a month apart and are available for download: • Set A link • Set B link • Digital Alteration Book (DAB): The DAB is the official log of map changes—such as new lots, merges, or boundary shifts—providing a clear record of how the Tax Map evolves. It is available through the Property Information Portal . Disclaimer: This dataset reflects formal applications submitted to DOF but may not reflect the latest changes in other City systems (e.g., exemptions or buildings data). It is provided for informational purposes only and is not guaranteed to be accurate as of today’s date.
View on NYC Open Data↗

Quality

B85.8 / 100

From a 500-row sample across 12 columns.

completeness67/ 25% weight
consistency71/ 20% weight
accuracy99/ 20% weight
timeliness100/ 15% weight
usability100/ 20% weight
  • · Has geographic keys — joinable to other NYC datasets

Related datasets

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  • PLUTO Change File0.30
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  • 2020 Neighborhood Tabulation Areas (NTAs)0.29
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  • NYC Zoning Tax Lot Database0.29

Geography

Has borough codes (`boro`) — joinable, but needs boundary shapes to draw.

Sample rows

the_geomboroblocklotbblbill_bbl_flagnycmap_bldg_flagvalue_reflected_out_flag
{"type":"MultiPolygon","coordinates":[[[[-73.941688701483,40.843568016266],[-73.941996712959,40.843697118916],[-73.941816324811,40.843940727946],[-73.94181100945,40.843947904894],[-73.941491169461,40.843813844213],[-73.941688701483,40.843568016266]]]]}121391811021390181010
{"type":"MultiPolygon","coordinates":[[[[-73.986579608885,40.731727503983],[-73.986765682638,40.731472690657],[-73.986843072,40.731505379416],[-73.986656998452,40.731760192866],[-73.986646398136,40.73175571571],[-73.986579608885,40.731727503983]]]]}1

Columns

16 queryable · 15 profiled

The machine field names SoQL needs, with the publisher's own description of each.

FieldTypeDescriptionNullValues
the_geomunknownGeometry field used for mapping. Geometry Type: MultiPolygon——
borocategoricalThis is a one digit number field that identifies the borough in which the associated feature exists.0%435of 5
blockintegerBlock is a five digit numeric field that identifies the block on which the associated feature exists.0%292574054452
lotintegerLot is a four digit numeric field that identifies a unique lot within a tax block. Although DOF has a set of defined limits for different types of lots, the fact that there are exceptions to these rules makes it impossible to use a domain for validity checking of the lot numbers.0%1

Query this from your own app

GET /api/datasets/i38t-6if2
GET /api/datasets/i38t-6if2/quality
GET /api/datasets/i38t-6if2/related
GET /api/columns?dataset=i38t-6if2
joins onbbl
  • DSNY Monthly Tonnage Data0.28
  • NYC Permitted Event Information0.28
  • 468
    49
    1004680049
    0
    1
    0
    {"type":"MultiPolygon","coordinates":[[[[-73.999703636479,40.716440247056],[-73.999621130202,40.71641120663],[-73.999777655226,40.716157703191],[-73.999860240676,40.716186614919],[-73.999703636479,40.716440247056]]]]}1199321001990032010
    {"type":"MultiPolygon","coordinates":[[[[-74.003177199734,40.721122767428],[-74.003477698919,40.721298966482],[-74.003423176908,40.72136272593],[-74.003105960505,40.721206760939],[-74.003120447365,40.72118968103],[-74.003177199734,40.721122767428]]]]}1229121002290012010
    {"type":"MultiPolygon","coordinates":[[[[-74.006714536518,40.732115536463],[-74.006723446415,40.732059815217],[-74.007180435857,40.732102975045],[-74.007171527259,40.732158696325],[-74.006714536518,40.732115536463]]]]}1605391006050039010
    {"type":"MultiPolygon","coordinates":[[[[-73.978742470835,40.780035318909],[-73.978559960168,40.78028536964],[-73.978545322059,40.780279208167],[-73.978498968679,40.780259698114],[-73.978681479504,40.780009648181],[-73.978742470835,40.780035318909]]]]}11147171011470017010
    {"type":"MultiPolygon","coordinates":[[[[-74.005606636902,40.738995204146],[-74.005858730563,40.738995152946],[-74.005913996435,40.738995164173],[-74.005975359336,40.73899517576],[-74.006021652414,40.73899518459],[-74.006020217264,40.73904074703],[-74.006019179126,40.739073684114],[-74.005926051519,40.73907366646],[-74.005839421874,40.739073649808],[-74.005595833288,40.739073784169],[-74.005606636902,40.738995204146]]]]}1627131006270013010
    {"type":"MultiPolygon","coordinates":[[[[-73.981072757714,40.721794952894],[-73.981123053656,40.721726035287],[-73.981170316299,40.721661274089],[-73.98121689331,40.721597452212],[-73.981262552794,40.721534887223],[-73.981376954262,40.721583126413],[-73.981313551224,40.721670004764],[-73.981343704413,40.721682719337],[-73.98121731181,40.721855908282],[-73.981072757714,40.721794952894]]]]}1385301003850030000
    {"type":"MultiPolygon","coordinates":[[[[-73.993307121805,40.732142534822],[-73.993454608838,40.732205390372],[-73.993284665747,40.732427325437],[-73.993137156211,40.732364499182],[-73.993307121805,40.732142534822]]]]}156191005610009010
    {"type":"MultiPolygon","coordinates":[[[[-73.989544588011,40.716602479169],[-73.989615604009,40.716624648858],[-73.9895459993,40.716760160145],[-73.989474052259,40.716738310038],[-73.989544588011,40.716602479169]]]]}1310181003100018010
    20
    15
    bbltextBBL is a concatenation of Boro-Block-Lot and is stored with every instance of those three fields. Although the BBL value can always be determined dynamically, this field is maintained in order to simplify indexing, searching and the use of the files by other, as yet undetermined, applications.0%507055000120999989005003190001
    condo_flagtextThe lot defines a condominium complex99%Cof 1
    reuc_flagtextAn REUC easement exists on part or all of this lot.99%Rof 1
    air_lot_flagtextAn air rights easement exists on this lot.100%Aof 1
    sub_lot_flagtextA subterranean easement exists on part or all of this lot.100%Sof 1
    easement_flagtextA land easement exists on part or all of this lot96%Eof 1
    lot_notetextNotes100%Add Lot faces for Block …Lot was not in COGISNo dimension has been ca…
    effective_tax_yeartextEffective Tax Year95%2007-20082008-20092006-2007
    bill_bbl_flagcategoricalThis field is used to identify the source of the Billing BBL Lot Number.1%01of 2
    nycmap_bldg_flagcategoricalThis field is used to identify those lots where a building footprint associated with that lot extends beyond the lot boundary.1%012of 3
    conversion_exception_flagcategoricalConversion Exception Flag31%019of 4
    value_reflected_out_flagcategoricalThis flag identifies those lots whose assessed value has been transferred to another lot.2%012of 7