TAX_LOT_FACE: New York City Tax Lot Boundary Line Data

Line-based spatial data from the New York City Department of Finance's Digital Tax Map collection represents the shape and location of tax lot faces. Data is extracted from DOF’s internal system on the last Friday of each month and refreshed on ArcGIS Online on the 1st. The dataset is provided for informational purposes only and is not guaranteed to be accurate as of today’s date.

Use Cases

• Calculating lot perimeter and boundary lengths using LOT_FACE_LENGTH and Shape__Length columns.
• Identifying and filtering specific tax lots by BORO, BLOCK, and LOT identifiers.
• Analyzing lot geometry and spatial relationships using the_geom and LOT_FACE_LENGTH_ERROR columns.
• Classifying lot face types and flags using TAX_LOT_FACE_TYPE and BLOCK_FACE_FLAG columns.

Strengths

• Data is updated monthly with a documented refresh cycle from the Department of Finance's internal system.
• Includes 18 columns for detailed spatial and administrative attributes, such as BBL, LOT_UUID, and SOURCE.
• Maintained with a dual-set (Set A and Set B) system for reliability, ensuring a fallback version is available.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to its source, covering only New York City.

Provenance

Source

New York City Department of Finance, Digital Tax Map Collection.

Collection Method

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

Freshness

Updated monthly; last metadata update was 2026-05-18 13:31:50.

Geography

New York City, New York, USA.