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Mobility Fund Phase I GIS Data

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Released: March 8, 2012


Federal Communications Commission

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DA 12-355
March 8, 2012



AU Docket No. 12-25
1. By this Public Notice, the Wireless Telecommunications and Wireline Competition Bureaus
(the Bureaus) announce the availability of geographic information system (GIS) data for the census
blocks potentially eligible for Mobility Fund Phase I support to be offered in Auction 901. This data does
not update or replace the list of potentially eligible blocks. Rather, it provides the same data in additional
formats and thus just supplements the previously-released data files and interactive map. We are taking
this step to make the data accessible to more people and to make it easier to use for individual analysis.
2. In the Auction 901 Comment Public Notice, the Bureaus concluded that we would identify
census blocks eligible for the Mobility Fund Phase I support to be offered in Auction 901 based on an
analysis of the most recent available American Roamer data, from January 2012.1 With the Auction 901
Comment Public Notice
, we provided a preliminary list of such blocks using older American Roamer data
and stated that we would provide an updated list of potentially eligible census blocks and related updated
information upon completion of our analysis of the January 2012 American Roamer data.2 With the
Auction 901 Updated Potentially Eligible Blocks Public Notice, we provided the updated list of
potentially eligible blocks based on January 2012 American Roamer data in electronic format as
“Attachment A” files.3
3. Concurrent with the release of Auction 901 Updated Potentially Eligible Blocks Public
Notice, the Bureaus announced the availability of a map of the updated potentially eligible blocks. The
map is an interactive visual representation of data from the updated Attachment A files. The Attachment
A files contain more information and generally more detail than is displayed on the map. The map is
available at and at
4. The data formats we make available are additional formats of the data as shown in the
interactive map. These formats, which are available at, are the
downloadable shapefile
web mapping service

1 “Mobility Fund Phase I Auction Scheduled for September 27, 2012; Comment Sought on Competitive Bidding
Procedures for Auction 901 and Certain Program Requirements,” AU Docket No. 12-25, DA 12-121, para. 15,
rel. February 2, 2012 (Auction 901 Comment Public Notice). A summary of the Auction 901 Comment Public
was published in the Federal Register at 77 Fed. Reg. 7152 (Feb. 10, 2012).
2 Id. at paras. 15, 18-19.
3 “Mobility Fund Phase I Auction; Updated List of Potentially Eligible Census Blocks,” AU Docket No. 12-25,
DA 12-187, rel. February 10, 2012 (Auction 901 Updated Potentially Eligible Blocks Public Notice).

Federal Communications Commission

DA 12-355

MapBox map tiles
5. The shapefile format is actually four individual files (.dbf, .shp, .shx, and .prj) all with the
same prefix.4 This format is generally recognized as a standard transfer file for GIS data. The shapefile
is an accepted transfer in just about every GIS software package.
6. Web mapping service (WMS) is an Open Geospatial Consortium standard for delivering
geospatial data over the web.5 The WMS data service can be viewed in two ways. First, the data can be
viewed by using the URL. Second, most GIS software allows you to add this service as a layer to your
session or project.
7. MapBox map tiles are cached map tiles of the data. With this open source software approach,
these image tiles can be joined with other MapBox layers to make new maps.6
8. For additional information about Auction 901, including an overview of requirements to
participate in the auction and proposals for auction procedures, you should consult the Auction 901
Comment Public Notice
. As set forth in that public notice, comments were due February 24, and reply
comments are due March 9, 2012. Comments and reply comments on census block eligibility challenges
are due March 16, 2012, and March 26, 2012, respectively.7 Public notices and additional information
about Auction 901 may be found at
9. For further information, contact Lisa Stover of the Auctions and Spectrum Access Division at
(717) 338-2868. To request materials in accessible formats (Braille, large print, electronic files, audio
format) for people with disabilities, send an e-mail to or call the Consumer and
Governmental Affairs Bureau at (202) 418-0530 or (202) 418-0432 (TTY).
- FCC -

4 See “Esri Shapefile Technical Description,” Last
visited March 7, 2012.
5 See Last visited March 7, 2012.
6 See Last visited March 7, 2012.
7 “Mobility Fund Phase I Auction; Limited Extension of Deadlines for Comments and Reply Comments on Census
Block Eligibility Challenges,” AU Docket No. 12-25, DA 12-236, rel. February 16, 2012.

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