GIS Expo 2014: Progress on the GSSI Initiative & Updates on the Census.gov Website
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Presentation by Linda Akers Smith, U.S. Census Bureau
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GIS Expo 2014: Progress on the GSSI Initiative & Updates on the Census.gov Website
- 1. Progress on the GSSI initiative Updates on the Census.gov Website HIGICC 2014 Honolulu, HI Linda Akers Smith March 14, 2014 1
- 2. Key Components of the GSS-I An integrated program that utilizes a partnership program for: • Improved address coverage • Annual, transaction-based address and spatial feature updates • Enhanced quality assessment and measurement 2 Address Updates 123 Testdata Road Anytown, CA 94939 Lat 37 degrees, 9.6 minutes N Lon 119 degrees, 45.1 minutes W Street/Feature Updates Quality Measurement
- 3. The GSS-I Partnership Program • Launched in October 2012 • Opportunity for tribal, state, county, and local governments to continually exchange address & spatial data with the Census Bureau • Recognizes local governments as a definitive authority for quality address and street data within their communities • Leverages the Census Bureau’s broad partner network to encourage participation 3
- 4. Benefits of Participation 4 Expanded ROI – encourages re-use of local government geospatial data Reduces redundant federal data collection efforts Increases usage of high-quality local government data for multiple federal programs Provides maximum input into the American Community Survey and Population Estimates Program
- 6. Partner Data Acquisition Data as of February 17, 2014 Partners Contacted Partners Providing Files Address List Acquired Structure Coordinates Acquired Street Centerlines Acquired Partner Files Processed TOTAL 375 247 164 546 615* 778** 6 * Some counties provided multiple partial- coverage street centerline datasets (i.e., cities vs. balance of county) ** Includes feature and address files processed through the MAF/TIGER system update process
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- 8. Total Partner Addresses Received (2/20/14) 28,673,572 Duplicates Addresses Identified within Partner Datasets (multi-unit addresses missing unit identifiers) 1,148,866 4% Total Unduplicated Partner Addresses 27,526,810 96 % Total Partner Addresses Matched to Master Address File (MAF) 24,336,743 88% of Total Addresses in Same Block as MAF 22,526,027 93% of Matched Addresses in Different Block than MAF 1,410,562 6% of Matched New Geocode Attained 140,427 1% of Matched Addresses w/ Same Address Class as MAF (residential, etc.) 12,397,201 51% of Matched Addresses w/ Different Address Class than MAF 494,185 2% of Matched Addresses w/ No Address Class Identified 11,445,357 47% of Matched Total Partner Addresses Unmatched to MAF 3,190,067 12% of Total Unmatched Class Residential 952,003 30% of Unmatched Unmatched Commercial/Other/ Unspecified 2,238,064 70% of Unmatched
- 9. Block Level Address Feedback Block Total Addresses Total Residential Total Nonresidential Total Other Total Matched Total Added Total Coordinates Added Total Not Accepted Total Not Accepted Duplicate Total Not Accepted Incomplete Total Not Accepted Other Total Currently in MAF 1000 0 0 0 0 0 0 0 0 0 0 0 1 1001 1 1 0 0 1 0 1 0 0 0 0 1 1002 4 4 0 0 4 0 3 0 0 0 0 4 1006 5 5 0 0 4 1 3 0 0 0 0 5 1008 2 2 0 0 2 0 2 0 0 0 0 5 1010 4 4 0 0 0 0 0 2 1 1 1 3 9 Consists of block tallies detailing: • What the partner provided • Number of records matched or added to the Census address list • Number of records not accepted • Total number of records currently in the MAF
- 10. Interactive Review and Update 10 • Digitizers interactively review the potential new and misaligned streets using the partner data and current imagery • In this example, the green-blue lines indicate street updates made by the Census Bureau based on the partner data • The Census Bureau added 39 miles of new streets and modified 115 miles of misaligned streets based on this partner’s street centerline data
- 11. Street Centerline Updates • 1,529.4 Miles of new roads added • Washington, DC to Julesburg, CO • 4,013.5 Miles of updated roads • Washington, DC to Fairbanks, AK • 5,542.9 total miles of feature updates • Across the US roundtrip 11
- 12. Feature Feedback 12 Adding a date of last update field to the partnership shapefiles:
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- 14. What’s new on www.census.gov? 14
- 15. What is the American Community Survey? A large, continuous survey that: • produces characteristics of population and housing (similar to Census 2000 long form) • produces estimates for small areas and small population groups • samples approximately 3.54 million resident addresses per year (about 290,000 per month) 15
- 16. ACS Content SOCIAL Ancestry Citizenship & Year of Entry Disability Status Educational Attainment Field of Degree Health Insurance Grandparents Fertility Language Marital Status & History Place of Birth Migration Relationship School Enrollment Veteran Status ECONOMIC Employment & Work Status Income & Earnings Industry & Occupation Class of Worker Commuting Poverty Status SNAP Receipt 16 HOUSING Age of Householder House Heating Fuel Household Size Kitchen Facilities Occupancy and Vacancy Owner Statistics Plumbing Facilities Race of HH Renter Statistics Rooms and Bedrooms Telephone Service Tenure Units in Structure Value of Home Vehicles Available Year Householder Moved Into Unit Year Structure Built DEMOGRAPHIC Age & Sex Race & Hispanic Origin
- 17. Data Product Release Schedule The ACS annually releases: 1-year estimates (2012) – Areas with populations of 65,000+ • The Nation • Every state, the District of Columbia, and Puerto Rico • Every Congressional District • About 25 percent of all counties 3-year estimates (2010-2012) – Areas with populations of 20,000+ 5-year estimates (2008-2012) – All areas down to the Block Group Level 17
- 18. American Fact Finder 18 • It's a good tool for novice users to get acquainted with ACS data tables • Select the advanced search option • ACS Tables are available for areas down to census tract level. • factfinder2.census.gov
- 19. Other Downloading Options 19 • Summary File Retrieval tool – Excel macro tool – Download ACS block group data – Includes Geoid – http://www.census.gov/acs/www/data_documentation/summary_ file/ • Download via FTP – Full dataset – www2.census.gov – ftp2.census.gov
- 21. What are TIGER/Line Shapefiles? • Extracts of selected geographic and cartographic information from MTDB. • Nationwide coverage • Contains no sensitive data • Are designed for use with GIS • Contains geographic linear, areal, and point features, including attribute information • Geographic entity boundaries • The legal and statistical areas for which Census tabulates data • http://www.census.gov/geo/maps-data/data/tiger.html 21
- 22. Which Product should I use? 22 Which product should I use? Product Best For... File Format Type of Data Level of Detail Descriptive Attributes Vintages Available TIGER/Line Shapefiles Most mapping projects--this is our most comprehensive dataset. Designed for use with GIS (geographic information systems). Shapefiles (.shp) and database files (.dbf) Boundaries, roads, address ranges, water features, and more Full detail (not generalized) Extensive 2006 - 2013, CD 113 TIGER Geodatabases Useful for users needing national datasets or all major boundaries for by state. Designed for use in ArcGIS. Files are extremely large. Geodatabase (.gdb) Boundaries, roads, address information, water features, and more Full detail (not generalized) Limited 2013 TIGER/Line Shapefiles & Geodatabases with Demographic Data Demographic analysis from selected attributes from the 2010 Census, 2006-2010 ACS 5- year estimates, 2007-2011 ACS 5-year estimates, and 2008-2012 ACS 5-year estimates for selected geographies. Designed for use with GIS. Shapefiles (.shp) and Geodatabases Boundaries, Population Counts, Housing Unit Counts, 2010 Census Demographic Profile 1 attributes, 2006-2010 ACS 5-year estimates data profiles, 2007-2011 ACS 5- year estimates data profiles. Full detail (not generalized) Limited 2010, 2006- 2010 ACS, 2007-2011 ACS, 2008- 2012 ACS
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- 26. Resources for Mapping Census Data 2010 Census Interactive Population Map A map viewer displays 2010 Census data down to the census block level. Census Data Mapper A map viewer displays selected 2010 Census data by county Census Flows Mapper A map viewer displays U.S. migration patterns by county and allows users to print a quality map. County Business and Demographics Map Language Mapper Metro and Micro Area Population Map Viewer OnTheMap An interactive tool maps data related to workers down to the census block level. OnTheMap for Emergency Management An interactive tool maps workforce and population data for current national hazard and emergency related events. Small Area Income and Poverty Estimates Interactive Mapping Other Federal Government Resources Map Viewers and Interactive Mapping Tools Census-Related Reference Resources http://www.census.gov/geo/reference/outside_sources.html
- 28. Thank you! Linda Akers Smith Los Angeles Regional Census Office 818-267-1724 linda.kane.akers.smith@census.gov 28
Notes de l'éditeur
- Thank you for the opportunity to present to you today. I would like to give you an update on steps we’ve taken to improve our geographic and address base files, and then talk about some of the new data and maps available on the census website.
- The Geographic Support System Initiative is a multi-year effort aimed at improving the overall coverage and quality of the Master Address File and features database - what we call TIGER - for the 2020 Census, and to support ACS and current survey work ---- (positively impacts the address frame for sample surveys)By doing so, we should be able to reduce the costly amount associated with a pre-census address canvass. Instead of travelling the nation looking for every place people live, we would canvass selected areas only after using other methods to determine the appropriate areas.--------------------------THE VISION of GSSI –To build a fully automated on demand transaction based environment to continuously replenish the MAF/TIGER system with high quality address and spatial data.
- Launched in 2012It’s the opportunity for State, tribal and local governments to continually exchange address and spatial data with the Census Bureau.It recognizes local governments as the definitive authority for quality address and street data within their communitiesOur local partners submissions greatly contributed to the accuracy and quality Census address and spatial data… and It’s a logical step to build upon these partnerships
- Some of the benefits of participation-encourages re-use of local government geospatial data investmentsReduces redundant federal data collection effortsIncreases usage of high-quality local government data for multiple federal programs, including the 2020 Census and the USGS National MapProvides maximum input into the American Community Survey and Population Estimates Program, which generate current housing unit statistics used to award federal grants (i.e., HUD, DOT)The LUCA program had a large footprint on the 2010 Census. We processed over 41 million State, Tribal and Local addresses in LUCA 2010 and we hope that working with our partners throughout the decade will lessen that LUCA footprint for 2020. This benefits both the partner and the Census Bureau.
- The Census Bureau has released Data Content Guidelines to describe the minimal and optimal information required for Addresses (including structure points), Street Centerlines, and Metadata provided by partners for the GSS-IFor Addresses, we attempt to do three things with a submitted address file:MATCHGEOCODE ADDTo Match an address, we need a complete address number and street name and either- a coordinate, or zip, or city and state or a census tract and block. This minimum information allows us to update the source data, adding to our confidence that the address is validIn order to update the GEOCODE of an address, there’s an additional requirement to have either an address coordinate or census tract and block.This minimum information allows us to assign a location to a previously ungeocoded address or to correct a geocode of a census address.To ADD a new partner address to the MAF, the submitted records need to meet the MATCH requirement and include an ADDRESS TYPE INDICATOR identifying the address as residential, commercial, etc..------------------------------------------For residential addresses with multiple units (i.e., apartments, condos, etc.), the partner address data should provide:a unique Within Structure Identifier (apartment #, unit #, etc.) to distinguish each unit from other units at the same Basic Street Address (BSA).or, if a Within Unit Identifier is not available or does not exist:The number of units at the BSA (i.e. “123 Main Street - 25 Units”)andA flag indicating which addresses are multi-unit structuresMuAnd for multiple unit addresses such as apartment buildings, we must have a unique within structure identifier such as apartment 101.The Census Bureau currently does not attempt to match or add any address records that contain only Non-City-Style AddressesGQ – name and type
- Partners we’ve contacted so far are from state, county, city and tribal governments. Of the 375 contacted, 247 partners provided files to us.we broke our State partner files into county partitions in order to create a more reasonable work unit to process. Note: the last 4 columns count the county partitions from State files as individual units. Also, some counties provided multiple partial coverage street centerline datasets. So far, we’ve received 164 address lists and 546 structure coordinate files and 615 street centerlines. Of those, we’ve processed 778 files.This year, we plan on targeting 250 counties. This coverage could come from Tribal, State or Local files. (parcel data is in the structure coordinates column)
- This is a map of the GSS-I partners that we have had contact with up to last month. The tribes and counties are indicated by a solid fill. The city participants are indicated by a dot. State partners are indicated by a dot-pattern fill.Reasons why partners are unable to provide data:Do not have an address fileFiles don’t meet minimum data standards.CostsUse agreementsData older than 2 years, not enough time to get submission together, lack of staffing.Reasons removed a file from processingDid not meet minimum standards File not complete (missing areas, missing address file)Lack of metadata (we couldn’t understand some of the coding, so wasn’t sure how to properly use the file)We’re learning that metadata us a critical resource for evaluating the quality of spatial features and addresses
- Blue – Addresses Received After removing duplicate addresses - 27.5 milSalmon Matching results - 88% matched to a MAF record Of those matches over 90% matched in the same block as the MAF6% in a different block (will be researched for correction)140,00 records obtained a geocode and were added into the MAFWhite - ponders the address classification of the matched recordsThe 11.5 million have not address type code, cannot be addedGreen - Addresses that did not match to the MAF.It is critical to stress that UNMATCHED doesn't equal MISSING. We probably already have over 95% of the unmatched records, just in a different form, so at this point, we do some hands on research.White – 494,185 further review. Res vs non-res, were these counted in the census, what’s in the DSF, did local provide use type or zoning?Green – assign addresses to powerpoles, wells. Mile markers, fire hydrants
- The Census Bureau is committed to providing Feedback to partners participating in the GSS-I. We’re providing block level feedback, showing Tallies for Matched, Unmatched, Added, and newly Geocoded addresses at the block levelCan see what we have now, what we added or did not accept, and what the current count after the matching process is complete
- This example is Essex County, VT.Digitizers interactively review the potential new and misaligned streets using the partner data and current imageryIn this example, the green-blue lines indicate street updates made by the Census Bureau based on the partner dataBecause of our limited resources we are focusing on adding and realigning features with residential housing units on them. This means we may not be adding features such as logging roads or forest service roads at this time.
- Even though we have limited our updates, we have added 1,529.4 miles of new roads, and 4000 miles of updates
- We are adding a ‘date of last update’ field (mtupdate) to the TIGER shapefiles that display when each line segment was updated last, so you can see updates that have been made to the TIGER shapefile.___________________________________________________________Additional feedback we’ll provideQualitative comparison of partner content and Census Bureau contentSpatial accuracy assessmentCategorization and summary of updates performed_________________________________________________What’s in it for you (benefits to our partners)Updated data frames in which sample addresses are selected will result in better survey data flowing out to youReduction in costs of doing a Census – taxpayer savingsBetter census = more accurate distribution of funds to local and state govtWill provide block level feedback which is a source that can be used to evaluate/improve your data
- The National Address Database (NAD) will be a multi-sourced compilation of address and geospatial coordinates, which offers tribal, federal, state, and local governments real-time access tothe most comprehensive and up-to-date address and location dataavailable from public and commercial sources through web-based self-service channels.For the depiction of the data flowing two ways into/from the National Address Database - the idea is that the NAD is a separate database from the Census Bureau's Master Address File (MAF), so not protected by the data confidentiality requirements of Title 13. The NAD would be stood up separately, serve as a repository for partners to load and manage their addresses, function as a government-to-government exchange mechanism, and then allow for a periodic 1-way delivery from the NAD to the MAF. The NAD would standardize incoming addresses to comply with the FGDC (and ISO?) Address Standard, and offer feedback on the standardization effort, geocoding success, and content issues - all separate from the Census Bureau.The idea is to encourage NAD users to designate their data as sharable with other governments (ie, their state, Census FEMA, etc. )similar to the concept in ESRI’s community maps application (and expected in our Community TIGER application). So, assuming they elect to share, individual addresses (not generalized by block) should be available. In my opinion, this is the strongest selling point for this, -creating a single federal/state/local source of reliable address information. Census takes on the responsibility of standing up and maintaining the NAD.Data sharing – create a model that will allow for address data sharing between local governments, state governments, and fed agencies.
- Now that we’ve talked about how we’re updating our geographic base and Address files, move on to discuss some of the products that have been produced
- The American Community Survey, or ACS is a nationwidesurvey that produces characteristics of the population and housing. (over a period of time, Not a point in time)These estimates are produced for small areas and small population groups. The American Community Survey is a continuous survey, in which each month a sample of housing unit addresses receives a questionnaire. About 3.5 million addresses are surveyed each year. ------------------------- the purpose of the decennial census is counting the population to support apportionment and redistricting. Use numbers from the 2010 Census to obtain counts of the population and their basic characteristics, such as sex, age, race, Hispanic origin, and homeowner status.ALL ACS DATA AEW SURVEY ESTIMATES – TO HELP YOU INTERPRET THE RELIABILITY OF THE ESTIMATE, THE CENSUS BUREAU PUBLISHESA MARGIN OF ERROR (moe) THE SMALLER THE POPULATION, THE GREATER THE MOE WILL BE THE DATA IS BASED ON A SAMPLE AND SUBJECT TO SAMPLING VARIABILITY THE DEGREE OF UNCERTAINTY FIR AN ESTIMATE ARISING FROM SAMPLING VARIABILITY IS REPRESENTED THOUGH THE MARGIN OF ERROR
- The content collected by the American Community Survey can be grouped into four main types of characteristics – social, economic, demographic, and housing.---------------------Most of the questions are driven by legislative requirements, in other cases, approval occurs based on an agencies justification and program needs.Some updated ACS content released this year includes data pertaining to:Computer and internet usageSNAP Parental place of birthVeterans statusWages , salary and property income--------------------------------------Emergency planners use ACS data for natural disaster planning and response. The number of households and relative economic vulnerability located in small areas inform the plans for moving large numbers of people and for providing efficient and appropriate responses.
- American FactFinderData portal providing access to decennial census, population estimates, economic census, and survey data for most levels of geography. Use the Advanced search option On the right side, Select your Dataset, your topic of interest and your geography. Geography can be selected via choosing from a list, by entering a name of a jurisdiction or typing an address or selecting a point or area on a map. You can then download the data into an database compatible .CSV table. Geographic identifiers are included in the file which can be joined in a GIS.
- Block level data from ACS is not available on the AFF, but can be downloaded using the Summary File retrieval tool.It’s an excel macro which allows you download up to 20 tables for all published geographies within a state down to the block group level. Geocodes are provided for use with a GIS.For experienced users that just want entire datasets, you can download all datasets at every geographic level directly off the Census Bureau’s FTP site. No GEOIDs includedWe have Data services staff whose do group trainings related to accessing census data. We’re beginning to use webex, as a training tool as well, so if you think your organization may be interested in doing this, I get you in touch.
- To improve access to data and encourage innovation, the Census Bureau provides Application Programming Interface (API) access to most data sets including acs , decennial data back to 1990 and economic indicator survey data to encourage use in web and mobile apps. We invite developers to provide feedback to help us move forward with continued API development. The API currently accepts calls using FIPS GNIS geography codes. There also is a tool under the Geography tab that converts lat/lon to a FIPS code---------------------------------Economic indicators- covering construction, housing, international trade, retail trade, wholesale trade, services and manufacturing. - provide measures of economic activity that allow analysis of economic performance and inform business investment and policy decisions.
- TIGER/line Products are spatial extracts from the Census Bureau’s MAF/TIGER database, containing features such as roads, railroads, rivers as well as legal and statistical boundaries. They are released yearly in the fall and can be downloaded via web interface of direct via FTPThe latest TIGER/line 2013 shapefile was released in August contains all legal boundaries and names as of jan 1, 2013
- At the TIGER page, you have some optionsSelect shapefiles if your interested in downloading single layers of geography. There are different years available. You can refer to the change notes tab to see what changes have been made since the last release.If you plan to use the new 2008-2012 5 year ACS data, you would choose the TIGER product for the last year in the range for the ACS estimates, the 2012 TIGER shapefile.We’ve also added Geodatabases that are pre-jointed with demographic data. Currently 2008-2012 ACS 5 year data is available for most statistical and legal areas down to the block groupCensus 2010 demographic profile data (age,sex,race, origin, tenure, relationship) . To the tract levelCensus 2010 population and housing counts down to the block level
- TIGERweb is a web based mapping tool allow the users to visualize our TIGER data without having to download the data. The applications allow users to select features and view their attributes, to search for features by name, address or geocode, and to identify features by selecting them from a map. aerial imagery or topography can be draped as background. The 2013 tigerweb vintage contains current, 2010 and 2000 boundaries.Here, I’m showing a map of the 2010 CDPs in Honolulu. If I wanted to look at how Honolulu CDP changed between 2000 and 2010,I could turn overlap the different time periods to show the differenced.___________________________________________________________________________
- We also have a TIGERweb decennial app which doesn't contain 2013 boundaries. From the home page, you can access TIGERweb as a map service or web service.All of the data in TIGERWEb is available via WMS and REST services (WMS) provides a simple HTTP interface for requesting geo-registered map images from our geospatial database. The response to the request is one or more geo-registered map images that can be displayed in a browser or WMS client application. By gaining access to our data through our WMS, users can produce maps containing TIGERweb layers combined with layers from other servers
- Census Explorer is another interactive map that gives users easier access to census tract-level statistics using 2008-2012 (ACS) data. Users can also compare the 2008-2012 ACS estimates to 2000 and 1990 Census data at the census tract level and higher for seven different variables. There’s also county business pattern data at the county and state levelsIF it’s received well, more data items will be added.
- The links below include both Census Bureau mapping resources as well as websites hosted by outside agencies and groups. Some websites contain map viewers, while others provide GIS-compatible files, and other tools and reference information, to aid data users with their own mapping software.
- The Census Bureau is working to increase our use of visualization in making data available to the public, and this gallery is an early part of that effort. The first posted visualizations pertained largely to historical population data. For more current visualizations, the topics will expand beyond decennial census data to include the full breadth of Census Bureau data sets and subject areas, from household and family dynamics, to migration and geographic mobility, to economic indicators. These visualizations are released weekly
- This list describes the high-level process for a typical GSS Initiative Partnership Program participant.Research available partner sources from Data.gov, existing partners, NSGIC GIS Inventory, telephone outreach etc…Acquire partner data and perform Content Verification to make sure that the data is understood so it can be used appropriately.Crosswalk, standardize, match, and geocode partner addresses and structure points using the Master Address File (MAF) Match street centerline data to identify differences, calculate spatial accuracy (CE95 method) of partner data using GPS control pointsIdeal Scenario: new addresses are added to the MAF, new streets are added to TIGER, address and spatial inconsistencies are submitted for resolution
- For addresses, we do three things with a submitted address fileMATCH – GEOCODEADDTo successfully match to the MAF, a partner address must include: This minimum information allows the Census Bureau to update the source data for an existing MAF address record, adding to our confidence that the address is valid.
- In order to update the geocode for an exiting MAF address, there’s additional requirement to have either an address coordinate or Census tract and block.This minimum information allows the Census Bureau to assign a location to previously ungeocoded addresses, to compare source geocodes to existing MAF geocodes, and to correct geocodes on MAF records where necessary. To Add new partner addresses to the MAF, the submitted recordMeet the MATCH requirement and Include an address type indicator identifying the address as residential, commercial, utility, etc_____________________________________Minimum Address Guidelines – WITHIN UNIT IDENTIFIERSFor residential addresses with multiple units (i.e., apartments, condos, etc.), the partner address data should provide:a unique Within Structure Identifier (apartment #, unit #, etc.) to distinguish each unit from other units at the same Basic Street Address (BSA).or, if a Within Unit Identifier is not available or does not exist:The number of units at the BSA (i.e. “123 Main Street - 25 Units”)andA flag indicating which addresses are multi-unit structuresMuAnd for multiple unit addresses such as apartment buildings, we must have a unique within structure identifier such as apartment 101.The Census Bureau currently does not attempt to match or add any address records that contain only Non-City-Style AddressesGQ – name and type
- One of the tools we’re developing in collaboration with ESRI is based on their COMMUNITY MAPS program.It’s a web based data exchange and data management portal.It allows for more fluid and unobtrusive data exchanges, you can upload your data and future transactions on your schedule, not ours.We plan to do some testing in the summer with a few selected governments with a release in July
- This diagram depicts the workflow of Community TIGER. Orange box shows the tools partners would use to select layers to upload, create a crosswalk, and validate data against Census standards. Questionable items can be reviewed within the ARCGIS software.It’s then processed to match against the address and spatial data in the cloud. The spatial data source is TIGER. Updates are sent to Census as transactions. Steps are automated and the processing and feedback time is reduced.July start testing out with a select # of govt’s to get feedback.--------------------------------Community MapsAllows you to share your authoritative content with the global community. Users inside and outside of your organization can use maps (ARCGIS online, explorer, or as standard web browser and mobile apps). The content is hosted on a ESRI’s secure cloud. By submitting your content, you get access to the content submitted by other government and commercial data providers. Reduced cost for making data widely available and offers a reliable way for your users to access critical information.Data reviewer checks - geometry checks, topology checks, null fields, address duplicate checks addr point attribute checks, ability to redline areas
- Did full adcan in almost entire US. One of costliest decennial ops in census.Need to reduce costs, asking ourselves is on the ground canvassing necessary everywhere? Aare there areas of the country we can keep address information current without canvassing?Can we identify characteristics of areas that should be targeted for a traditional canvass?Issue: non-city style addressesScoring addresses based on factors such as mailability, deliverability, locatability, geocode accuracy. (was there a high degree of confusion, change btwn pre 2010 and 2010 census? Is there change/confusion btwn MAF/DSF, btwn local and MAF? Has there been change in the area (fire, flood). Building permit info, pop estimates?No changes vs, substantial changes 699 tracts no change 2000- 2010Census HU counts = MAF HU counts = DSF countsDSF stability no change 2011-2012 19,000 tractsGOVT participation in census programsType A addsCity style vs non city style addressesHidden housing. Small multi units, conversions vs. Single family tracts, built many yrs agoApply a score at tract? Level?