2010 Local Update of Census Addresses (LUCA)

2010 Local Update of Census Addresses

(LUCA)Maryland State Data Center

Annual Affiliate MeetingApril 4, 2007

How Is The Census Taken?

Compile a Master Address File (MAF) - an up to date inventory of known living quarters– Approximately 120 million addresses

• Updated with:– Postal Service Delivery Sequence File– Pre-Census Field Address Listing– Local Address Review - LUCA

• Every KNOWN address will be accounted for

Through Address Based Enumeration

Why are Finding Addresses Important?

• Everyone wants to be counted – census counts are used for apportionment and redrawing political districts

• MONEY – More than $300 billion in federal funds distributed every year based on census data

• Better data – housing units and group quarters (nursing homes, prisons, dormitories) are geocoded to a census block.

Why Such Low Participation?

• Lack of Awareness• Lack of Understanding the

Importance• Lack of Data• Lack of Resources• It’s Not EASY!

Why is it so Difficult?Additions to the Housing Stock

• New structures• Conversion of existing

residential to multiple units• Conversion of non-residential• Rehab of

abandoned/condemned• Mobile Homes

Subtractions from Housing Stock

• Demolished• Conversion of existing

residential – combining units• Conversion to non-residential• Abandoned/condemned• Mobile Homes relocated

Locating Group Quarters

• College Dormitories• Correctional Facilities• Nursing Homes• Psychiatric Centers• Small Residential Care Units

Why so Difficult cont’d

Each address that is added, deleted or modified must be “geocoded” to the correct census block !

Your address list may appear in this format:

100 South Main Street, Anytown, Maryland 21111

But must be converted to the Geocode belowSTATE CNTY2000 CT2000 BLK2000

24|005|430300|5009 State = 24

County = 005 for Baltimore Co.

Census Tract = 430300 ( 6 digit code)

Block = 5009 (4 digit code)

Map Showing Census Tract and Block

Census tract 430300

Census block 5009

Identifying Units Isn’t So Easy!

Multiple households in one housing unit

Special thanks to the New York State Data Center for use of photographs depicting addresses difficult to identify

Finding Census Addresses

What to Use?

Participate and Review Using Sources Such as:

• YOUR building permit data

• Maryland PropertyView data from

assessment records

• E911 records

• Occupancy permits

• Utility records

2010 LUCA Milestones• January 2007 - advance notice letters to

highest elected officials and other contacts• March – May 2007 - informational training• July 2007 - invitation letters and registration

materials mailed to HEOs and other contacts• July 2007 – April 2008 - local governments

register for LUCA, receive training, update their address list and return materials (within 120 days of receipt of materials)

• April 2008 – October 2008 Census Bureau reviews LUCA submissions and updates MAF