Mapping Tennessee
The 2020 Census Local Update of Census Addresses Operation (LUCA)
Posted on October 13th, 2017

​The 2020 Census Local Update of Census Addresses Operation (LUCA)

What is LUCA?
LUCA is the only opportunity offered to tribal, state, and local governments to review and
comment on the U.S. Census Bureau’s residential address list for their jurisdiction prior to the 2020 Census. The Census Bureau relies on a complete and accurate address list to reach every living quarters and associated population for inclusion in the

Why participate in LUCA?
• To help ensure an accurate decennial census count in your community.
• To help the federal government distribute more than $400 billion in
funds annually for infrastructure, programs, and services.
• To help your community plan for future needs.

Who can participate in LUCA?
Active, functioning, legal governments can participate in LUCA. These
• Federally recognized tribes with a reservation and/or off-reservation
trust lands.
• States.
• Counties.
• Cities (incorporated places).
• Townships (minor civil divisions).

If you are unable to participate in LUCA, you may designate an alternate
reviewer for your government, such as your county, state data
center, or regional planning agency.

• Tuesday, October 17th:
102 East college Street
Jackson, TN
• Wednesday, October 18th:
124 Weldon Drive
Martin, TN
• Thursday, October 19th:
1225 South Willow Avenue
Cookeville, TN
• Friday, October 20th:
3211 North Roan Street
Johnson City, TN
• Monday, October 23rd:
3131 Morris Avenue
Knoxville, TN
• Tuesday, October 24th:
740 E. 12th Street
Chattanooga, TN
• Tuesday, October 31st:
6200 Poplar Avenue, first floor
Memphis, TN

For more information about LUCA, call
1-844-344-0169, e-mail us at
<>, or
visit our Web site at < /geo/partnerships/luca.html>.

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LUCA Materials
The Geographic Update Partnership Software (GUPS) is new for LUCA. The GUPS is a self-contained Geographic Information System (GIS) update and processing package. In addition to the software, you will receive the Census Bureau’s address list, address count list by census block, and Topologically Integrated Geographic Encoding and Referencing (TIGER) partnership shapefiles.

The Census Bureau offers its address list in digital or paper formats. The digital format requires the use of spreadsheet or database software. The paper format is available only to  governments with 6,000 or fewer addresses.

Maps are offered in digital (TIGER partnership shapefiles that require GIS software) or paper (large format maps are 42 X 36 inches and include a DVD of small format [8.5 X 14 inches] block maps in Adobe PDF) formats.

The Census Bureau offers in-person training using LUCA materials. Self-training aids and Webinars are available online at the LUCA Web site.

What’s new for LUCA?
• Pre-LUCA activities provide more opportunities to submit
address information and receive feedback through the continuous
Geographic Support System (GSS) Program.
• Streamlined participation through the Full Address List Review
provides the opportunity to review and update the Census Bureau's
address list.
• The Census Bureau’s digital address list is available in new,
convenient standard software formats.
• Comprehensive data that includes ungeocoded address and
residential structure coordinates.

Preparing for LUCA
You will receive only the addresses within your jurisdiction’s boundaries that are currently on file with the Census Bureau. By participating in the 2017 Boundary and Annexation Survey (BAS), you have the opportunity to verify or update your jurisdiction’s boundaries. Doing this
will ensure that you receive the complete list of addresses for your jurisdiction in LUCA.

To prepare your address list before you receive your LUCA materials:
• Ensure that your address list contains multiunit structure identifiers (such as apartment
numbers for individual units) and that you can distinguish between residential addresses
and nonresidential addresses.
• Identify local address sources, such as building permits, E-911 address files, local utility records, annexation records, and assessment or taxation files.
• Visit the LUCA Web site or plan to attend a LUCA promotional workshop to get more information about participating in the program.

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