The District of Columbia

DCGIS_BROADBAND.BroadbandAdoption_Residential

DCGIS_BROADBAND.BroadbandAdoption_Residential

by Office of the Chief Technology Officer on 20101203

Keywords
About: Broadband, Adoption, Availability, Providers, Service, DCGIS, OCTO, PCS, Tract, Census, Major Providers
Taking place at: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Abstract

The dataset known as District of Columbia Broadband Adoption by Census Tract contains locations and attributes of broadband service available within the District of Columbia. The agregate data was compiled from data submitted by broadband providers and verified by the DC Geographic Information System (DC GIS) and the D.C. Public Service Commission for the D.C. Office of the Chief Technology Officer (OCTO).

The project was funded by the United States Department of Commerce National Telecommunications and Information Administration (NTIA). The American Recovery and Reinvestment Act (ARRA) directed NTIA to develop and maintain a comprehensive nationwide inventory map of broadband service capability and availability, and to make the map publicly available via the Internet. NTIA is collecting data from all 50 states, 5 territories, and the District of Columbia. Detailed information about this project can be found in the State Broadband Data and Development Grant Program Notice of Funding Availability (NOFA) (http://www.ntia.doc.gov/frnotices/2009/FR_BroadbandMappingNOFA_090708.pdf) and subsequent clarifications.

This data collection is to be conducted on a semi-annual basis over a five-year period. This data will attempts to reflect conditions in the field as of December 2009.

The data is covered by nondisclosure agreements entered into by OCTO and broadband providers. The data contains COMMERCIAL / PROPRIETARY and CONFIDENTIAL INFORMATION. The data is compiled solely for use by NTIA and cooperating federal agencies. Redistribution of the data in its raw form is prohibited.

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. NTIA will use the data collected by grantees including the District of Columbia, in combination with other data sources, to create and publish online the National Broadband Map by February 17, 2011. The map will further educate consumers and businesses about broadband Internet availability, enable broadband Internet providers and investors to make better-informed decisions regarding the use of their private capital for future broadband investment, and inform the decisions of Federal, State, and local policymakers as they work to expand the benefits of broadband to all Americans.

Access constraints

The data is covered by Non-Disclosure Agreements entered into by OCTO and broadband providers. The data contains COMMERCIAL / PROPRIETARY and CONFIDENCIAL INFORMATION. The data is compiled solely for use by the NTIA and cooperating federal agencies. Redistribution of the data in its raw form is prohibited.

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

Barney Krucoff
in Office of Chief Technology Officer

1100 15th Street NW
Washington DC, 20005, USA

phone: 202-722-9307
fax: 202-727-5660
hours: 9:00 AM to 5:00 PM, Monday to Friday

Credits

District of Columbia Geographic Information System (DC GIS)
District of Columbia Office of Chief Technology of Officer (OCTO)
District of Columbia Public Service Commission
United States Department of Commerce National Telecommunications and Information Administration (NTIA)
Broadband Service Providers within the District of Columbia.

Data accuracy

Accuracy
The attributes are believed to be accurate, but are subject to change. The validation steps described under logical consistency also apply here. As of this submission the District did not attempt to verify "typical speed" except for some wireless providers.

The dataset does contain null fields and those should be interpreted as no data was available.

Logical consistency
The data were compiled from data submitted by broadband providers and verified by the DC Geographic Information System (DC GIS) and the D.C. Public Service Commission for the D.C. Office of the Chief Technology Officer (OCTO). Although attempts have been made to validate and normalize the data, the dataset cannot be considered entirely logically consistent. Broadband providers submitted data in a variety of formats and levels of accuracy. Moreover, by reporting data at the census block inevitably mixes some parkland and institutional land where wireline service cannot be delivered with commercials or residential areas where the service is offered. In such cases we have attempted to err on the side of the largest service territory so as not to leave residents or businesses out.

The following steps were taken to validate the data submitted and make it as logically consistent as possible:

The District completed drive testing of major wireless providers. This was accomplished by installing computer and GPS hardware and software in a vehicle and testing and mapping upstream and downstream transmission speeds. Some wireless providers were not tested during the second round. These are noted in the validation field.

The District, through our Public Service Commission, has made extensive use of FCC Form 477 data. The Form 477 was used to: verify that we have contacted the correct providers; compare the technology of transmission and speed of transmission between what was reported to the FCC and what was submitted by the provider; Compare the geography reported to the FCC in census tracts with the areas submitted to the District in census blocks. Where discrepancies were found, the providers were asked for more information.

The District purchased a database of broadband subscribers from a commercial mailing list company InfoUSA. The dataset is used to crosscheck data coming from providers. Where discrepancies have been found, the providers were asked for more information.

Completeness
The District attempted to contact firms that where identified from DC PSC and FCC records as possible broadband providers operating in the District. OCTO believes that all firms with more than a few hundred customers have been processed.

Both verified and unverified firms have been included in our submission. The verification status of each firm is noted in the database.

Horizontal positional accuracy
Service teritories are rounded to the nearest Census Block. Horizontal Accuracy is equal to that of the source US Census TIGER Data.

Vertical positional accuracy
NA

Lineage / Sources

  • <The title or descriptor of the source.>
    Multiple, <The part of the layer the source information contributed to in data development.>
    <A short title or descriptor of the source.>
    by <The name of the organization or individual that developed the source.>, <The publication date of the source. This is formatted to "dd/mm/yyyy.">
Lineage / Processes

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 DC 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 - 5:30 pm

Entity

DCGIS_BROADBAND.BroadbandAdoption_Residential

Attributes

  • OBJECTID / ESRI
    Internal feature number.
  • Shape / ESRI
    Feature geometry
  • DEC_2009
    Broadband Residential Adoption Rate - December 2009
  • SHAPE / ESRI
    Feature geometry.
  • SHAPE.AREA
  • SHAPE.LEN
  • DEC_2008 / ESRI
    Broadband Residential Adoption Rate - December 2008

Metadata

FGDC Content Standards for Digital Geospatial Metadata / FGDC-STD-001-1998 as of 20111115

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 pm