New York City Tax Lot Polygons from the Digital Tax Map

Polygon-based spatial data representing the shape, location, and identity of Tax Lots in New York City. The dataset is maintained by the New York City Department of Finance and is extracted from their internal system on the last Friday of each month. It is part of the Digital Tax Map Collection and is provided for informational purposes with no guarantee of accuracy as of the current date.

Use Cases

• Map property boundaries for urban planning based on tax lot polygons.
• Analyze changes in lot configuration over time based on the Digital Alteration Book (DAB) log.
• Integrate lot geometry with other city datasets for location-based analysis.
• Visualize the spatial distribution of tax lots for civic applications.

Strengths

• Data is updated monthly with a documented extraction and refresh schedule.
• A backup system (Set A and Set B) is maintained to ensure reliability.
• Polygon data provides explicit shape and location information for tax lots.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The data may not reflect the latest changes in other City systems like exemptions or buildings data.

Provenance

Source

City of New York, Department of Finance

Collection Method

Extracted from DOF’s internal system and published via ArcGIS Online feature servers.

Freshness

Updated monthly; last metadata update was 2026-03-22 03:55:06.587296.

Geography

New York City