The District of Columbia

DC Boundary (DCBndyPly)

DC Boundary (DCBndyPly)

by Office of the Chief Technology Officer on 06/10/2002

Keywords
About: Political Jurisdictions, Boundary, boundaries, imageryBasemapsEarthCover, Government Jurisdictions
Taking place at: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Abstract

District of Columbia boundary. The dataset is a polygon representing the District of Columbia boundary, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies.

The boundary was identified from public records and heads-up digitized using a combination of the 1995 orthophotographs, planimetric roads features, and the USGS digital raster graphic quad sheets, and 1999 planimetrics for the Potomac River boundary.

All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.

METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.

Purpose

This data is used for the planning and management of Washington, D.C. by local government agencies.

Access constraints

Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies.

Use constraints

Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Point of contact

GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5:00 pm

Credits

D.C. Office of Planning

Data accuracy

Accuracy
Data believed to be complete and accurate as of the time period cited. Subject to change. Digital version compared with original source data for accuracy and completeness. In process of validation by source and/or responsible agency.

Logical consistency
In process of validation by source and/or responsible agency.

Completeness
Data believed to be complete and accurate, subject to change. Digital version compared with original source data for accuracy and completeness. In process of validation by source and/or responsible agency.

Horizontal positional accuracy
In process of validation by source and/or responsible agency.

Vertical positional accuracy
N/A

Lineage / Sources

  • USGS 1:24,000 Digital raster graphic quad sheets
    digital, boundaries
    USGS quads
    by USGS
  • Planimetric water feature
    coverage, boundary
    Planimetric water features
    by DC GIS
Lineage / Processes
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5:00 pm
The boundary was identified from public records and heads-up digitized using a combination of the 1995 orthophotographs, planimetric roads features, and the USGS digital raster graphic quad sheets, and 1999 planimetrics for the Potomac River boundary.

The DC boundary is defined by cornerstones and the far Potomac riverbank. It has not been resurveyed since 1965.

The three corners were located on the USGS quads, and lines drawn to connect them. Those lines were intersected with the riverbank edge form the planimetric water feature. The resulting line coverage was then built as a polygon.

A base ArcInfo coverage of correct line work (snapbase.e00) for all DC data was developed after the final delivery of the planimetric street centerlines. The datasets were selected from the snapbase coverage, creating coincident geography with the other DC GIS datasets. When imported into the DC GIS geodatabase the coverages shift 0.01mm since the geodatabase supports only 11 digits of precision, not double precision (16 digits). The DC Boundary was part of this base dataset.

Planimetrics were created at a scale of 1:1,000. This means that a well defined feature falls within two feet of true position.

All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.

Distribution

Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page. Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.

Distribution liability
Acknowledgment of the DC Geographic Information Systems Program (DC GIS). The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Distributed by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5:00 pm

Entity

DCGIS.DCBndyPly

Attributes

  • Shape / ESRI
    Feature geometry.
  • CITY_FIPS
    City FIPS code
  • CITY_NAME
    City name
  • STATE_FIPS
    State FIPS code
  • STATE_NAME
    State name
  • STATE_CITY
    State and city name
  • TWO_OR_MOR
    Two or more
  • WEB_URL
    Web link url
  • AREAKM
    Area in kilometers
  • AREAMILES
    Area in miles
  • SHAPE / ESRI
    Feature geometry.
  • AGE_0_4
    Total Population Age 0 - 4
  • AGE_5_17
    Total Population Age 5 - 17
  • AGE_18_24
    Total Population Age 18 - 24
  • AGE_25_34
    Total Population Age 25 - 34
  • AGE_35_44
    Total Population Age 35 - 44
  • AGE_45_54
    Total Population Age 45- 54
  • AGE_55_64
    Total Population Age 55 - 64
  • AGE_65_
    Total Population Age 65+
  • TOTAL_YOUT
    Total youth population
  • WHITE
    Total youth population - White
  • BLACK_AFRI
    Total youth population - Black
  • AMER_INDIA
    Total youth population - American Indian
  • ASIAN
    Total youth population - Asian
  • HAWIAN_PAC
    Total youth population - Hawaiian/Pacific Islander
  • HISPANIC
    Total youth population - hispanic
  • OBJECTID / ESRI
    Internal feature number.
  • CAPITAL
    Capital
  • OTHER
    Total youth population - other
  • POP
  • SHAPE.AREA
  • SHAPE.LEN

Metadata

FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 06/30/2008

Provided by
GIS Data Coordinator
in D.C. Office of the Chief Technology Officer

441 4th St NW, Suite 930 South
Washington DC, 20001, USA

fax: (202) 727-5660
hours: 8:30 am - 5:00 pm