Square Points

Squares are calculated by the outer extents of the record or tax lots within a defined area (typically a city block). There are roughly 4896 active squares. A Square is similar to a city block. Squares were numbered starting at 1 and are currently in the 6000 series. Not all squares are active. A common cause of squares becoming inactive has been through street closing and combining squares. When the squares are combined usually the lower square number is killed and the higher square number is used for the combined square. For example if squares 1 and 2 are combined, square 1 is killed and the combination becomes square 2.Spatial locations:Each Square is an Island, alone unto itself. There is not now, and has never been, any citywide Survey Coordinate System in D.C. Most squares are unrelated to other Squares by “Measured.” They are related by Record. Street width is approximate. You cannot rely on the published official street widths to set up property lines or determine right-of-way. There is digital scan information available from DDOT regarding Right-of-Way. Some Squares are divided by streets. That is, the same Square continues on the other side of the street. Since there is no citywide Survey Coordinate System, squares were placed in their approximate location. This process is known as “best fit”.

Data and Resources

Field Value
accessLevel public
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier https://www.arcgis.com/home/item.html?id=c177520a895c4c1d9ee18c0404b7df84&sublayer=21
issued 2015-02-27T21:09:56.000Z
landingPage https://opendata.dc.gov/datasets/DCGIS::square-points
license https://creativecommons.org/licenses/by/4.0
metadata_type geospatial
modified 2025-05-19T18:22:54.000Z
old-spatial -77.1131,38.8166,-76.9101,38.9941
publisher Department of Buildings
resource-type Dataset
source_datajson_identifier true
source_hash b64d5343945abc2f8e1169f1df362e3184ba0e96eef5e79c893c48dd73b560da
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-77.1131, 38.8166], [-77.1131, 38.9941], [-76.9101, 38.9941], [-76.9101, 38.8166], [-77.1131, 38.8166]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • cadastral
  • dc
  • district-of-columbia
  • land
  • lot
  • property
  • square
  • squares
  • vpmdata
  • washington-dc
isopen True
license_id cc-by
license_title Creative Commons Attribution
license_url http://www.opendefinition.org/licenses/cc-by
maintainer DCGISopendata
maintainer_email gisgroup@dc.gov
metadata_created 2025-09-23T23:49:15.031479
metadata_modified 2025-09-23T23:49:15.031487
notes <div style='text-align:Left;'><div><div><p><span>Squares are calculated by the outer extents of the record or tax lots within a defined area (typically a city block). There are roughly 4896 active squares. A Square is similar to a city block. Squares were numbered starting at 1 and are currently in the 6000 series. Not all squares are active. A common cause of squares becoming inactive has been through street closing and combining squares. When the squares are combined usually the lower square number is killed and the higher square number is used for the combined square. For example if squares 1 and 2 are combined, square 1 is killed and the combination becomes square 2.</span></p><p><span>Spatial locations:</span></p><p><span>Each Square is an Island, alone unto itself. There is not now, and has never been, any citywide Survey Coordinate System in D.C. Most squares are unrelated to other Squares by “Measured.” They are related by Record. Street width is approximate. You cannot rely on the published official street widths to set up property lines or determine right-of-way. There is digital scan information available from DDOT regarding Right-of-Way. Some Squares are divided by streets. That is, the same Square continues on the other side of the street. Since there is no citywide Survey Coordinate System, squares were placed in their approximate location. This process is known as “best fit”.</span></p></div></div></div>
num_resources 7
num_tags 18
title Square Points