DC Cadastral Square Points for Property and Lot Mapping

4896 active squares represent the outer extents of property records or tax lots in Washington D.C., typically corresponding to city blocks. Squares were numbered starting at 1 and are currently in the 6000 series, with some becoming inactive through street closings and combinations. The data is provided by the District of Columbia and was last updated in March 2026.

Use Cases

• Visualize approximate property block boundaries based on the 'square' concept.
• Analyze changes in active square counts over time based on street closures and combinations.
• Perform spatial 'best fit' analysis for property placement in a city lacking a unified coordinate system.

Strengths

• Contains approximately 4896 active squares.
• Provides data on square numbering and combination history.
• Offers multiple geospatial file formats including KML, GeoJSON, and CSV.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Spatial accuracy is limited as squares are placed via 'best fit' without a citywide survey coordinate system.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

District of Columbia

Freshness

Last updated 2026-03-25 08:34:21.214712; freshness should be verified.

Geography

Washington D.C.