New York City Tax Lot Parcel Boundaries

New York City polygon-based spatial data represents the shape, location, and identity of Tax Lots from the Department of Finance Digital Tax Map. The dataset is extracted from DOF's internal system on the last Friday of each month and refreshed on ArcGIS Online on the 1st. It is provided by the New York City Department of Finance via data.cityofnewyork.us.

Use Cases

• Analyze lot size and shape distributions across boroughs using the_geom and BORO columns.
• Identify condominium units and easements for property assessment using CONDO_FLAG and EASEMENT_FLAG.
• Track lot subdivisions and administrative changes over time using SUB_LOT_FLAG and LOT_NOTE.
• Validate tax billing lot linkages and exceptions using BILL_BBL_FLAG and CONVERSION_EXCEPTION_FLAG.
• Map building footprints and air rights parcels using NYCMAP_BLDG_FLAG and AIR_LOT_FLAG.

Strengths

• Monthly update cycle ensures regular data refresh.
• Polygon-based spatial data provides detailed lot geometries.
• Includes 16 distinct columns for lot attributes and flags.

Limitations

• Exact row count and dataset size are unknown.
• Data may not reflect latest changes in other City systems like exemptions.
• Temporal coverage and effective tax year range are unspecified.

Provenance

Source

New York City Department of Finance Digital Tax Map.

Collection Method

Extracted from DOF's internal system.

Freshness

Updated monthly.

Geography

New York City.