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Boundary and Annexation Survey (BAS) Response Methods

Digital BAS

Digital BAS is designed to accept submissions from experienced geographic information system (GIS) users. Participants create change polygons utilizing geoprocessing functions available in most GIS software. The Digital BAS must be submitted in a prescribed standard format described in the Digital BAS Respondent Guide [PDF].

Download option: Participants may Download Shapefiles and Digital BAS Respondent Guide [PDF].

CD/DVD option: Participants may choose to receive shapefiles and Digital Respondent Guide on CD/DVD.

     Note:  Downloaded data and mailed data are identical.

Digital BAS FAQs and Tips

Digital BAS Tutorial Videos

Please contact the Census Bureau by e-mail at geo.bas@census.gov for more information.



MAF/TIGER Partnership Software (MTPS)

MTPS is a PC-based software application for participants to digitally update Census Bureau maps and forms. Participants do not need to have GIS experience or software in order to respond using the MTPS.

     Note:  Experienced GIS users generally prefer Digital BAS.

Download option: Participants may download the MTPS and the accompanying data. For more information, please follow the link to the MTPS download page. Users may also download the MTPS Respondent Guide [PDF].

CD/DVD option: Participants may choose to receive a CD containing the software and corresponding data to install on their computer. To request the MTPS CD/DVD option, please contact the Census Bureau by e-mail at geo.bas@census.gov.

     Note:  Downloaded data and mailed data are identical.

MAF/TIGER Partnership Software (MTPS) FAQs and Tips

MTPS Tutorial Videos

Please contact the Census Bureau by e-mail at geo.bas@census.gov for more information.



Paper BAS

Participants update their boundary and geographic information on paper maps. There are two options for Paper BAS. The first, preferred, option is for the participant to download and print the maps from the BAS web site. The second option is for the participant to request paper maps from the Census Bureau by returning their Annual Response form or Respond Online. In order to reduce the cost of this survey, the Census Bureau requests that participants view their maps online before requesting paper maps. If there are no changes to report, the Census Bureau asks participants to return only the “No Change” postcard provided with their materials.

There are seven steps involved in updating paper BAS materials, including:

  • Reviewing and updating (if necessary) the geographic information on the BAS form
  • Reviewing and annotating the map with boundary changes and corrections
  • Annotating the address breaks at the intersection of roads and boundaries
  • Annotating point and area landmark changes, additions and deletions
  • Signing the updated maps
  • Returning the updated maps and completed BAS forms

Paper BAS FAQs and Tips

Paper BAS Respondent Guide [PDF]

Paper BAS Tutorial Videos

Please contact the Census Bureau by e-mail at geo.bas@census.gov for more information.



Submitting a No Change Response

If your entity does not have any changes to report for the current BAS cycle, you may notify the Census Bureau by responding online, e-mailing geo.bas@census.gov, or returning the paper No Change Postcard that was included in your BAS package. If you choose to notify the Census Bureau via e-mail, please type "no boundary changes" in the subject heading and provide the following contact information for your Highest Elected Official and, if different, the BAS contact:

  • Name
  • Title
  • Entity Name
  • Mailing Address
  • Phone and Fax number
  • Email Address

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Source: U.S. Census Bureau | Geography | (301) 763-1128 |  Last Revised: October 28, 2013