Related URL

Link: GET DATA Description: Data download page. Link: GET RELATED VISUALIZATION Description: Maps in PDF and PNG formats.

Geographic Coverage

N: 22.0

S: 17.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: Seirup, L., and G. Yetman Dataset Title: U.S. Census Grids (Summary File 3), 2000 Dataset Release Date: 2006-05-31 Dataset Release Place: Palisades, NY Dataset Publisher: NASA Socioeconomic Data and Applications Center (SEDAC) Version: 1.00 Data Presentation Form: raster, map Online Resource: http://sedac.ciesin.columbia.edu/data/set/usgrid-summary-file3-2000

Temporal Coverage

Start Date: 2000-04-01

Stop Date: 2000-04-01

Location Keywords

CONTINENT > ANTARCTICA > ROSS ISLAND CONTINENT > ANTARCTICA > TERRA NOVA BAY

Data Resolution

Latitude Resolution: 0.0083 Decimal degrees Longitude Resolution: 0.0083 Decimal degrees

Science Keywords

HUMAN DIMENSIONS >POPULATION >POPULATION DISTRIBUTION    [Definition]

HUMAN DIMENSIONS >POPULATION >POPULATION SIZE    [Definition]

ISO Topic Category

BOUNDARIES SOCIETY

Project

EOSDIS >Earth Observing System Data Information System    [Information]

ESIP >Earth Science Information Partners Program    [Information]

USCG >U.S. Census Grids    [Information]

Quality

1. The 2000 SF3 files for each state are loaded into Microsoft Access and queries are used to extract the records pertaining to census blocks and the fields being used for gridding. 2. The SF3 fields are combined as specified in the variable documentation to create the variables being gridded. 3. For all states, except Hawaii, the 2000 TIGER/Line files are converted to ArcInfo coverages using the ArcInfo command TIGERTOOL. For Hawaii, a census block shapefile is downloaded from the Hawaii Statewide GIS Program web site at http://www.hawaii.gov/dbedt/gis/download.htm and converted to an ArcInfo coverage. The Hawaii state shapefile is used because the U.S. Census tiger data for Hawaii does not use the NAD 83 datum and the Census Bureau does not specify what regional datum is used for Hawaii. The Hawaii state shapefile has been converted to NAD 83. 4. The SF3 block group data are proportionately allocated to census blocks using an appropriate variable from the Summary File 1 data. For instance, the residents in the block group with a high school degree are allocated to the block using the population age 25 and older from SF1 data. 5. The SF3 counts assigned to each census block are joined to the tiger coverages. The density of each variable is calculated for each census block. 6. A 30 arc-second fishnet is created and unioned with the census block coverage. 7. The area in square kilometers is calculated for each area of intersection. The total count for each variable is calculated by multiplying the area in square kilometers in each area of intersection by the density of that variable in the underlying census block. 8. The total count for each grid cell is calculated by aggregating the variable counts for each area of intersection that falls within that grid cell. 9. The fishnet grid for each variable is converted to raster format.

Access Constraints

None

Use Constraints

The Trustees of Columbia University in the City of New York hold the copyright of this dataset. Users are prohibited from any commercial, non-free resale, or redistribution without explicit written permission from CIESIN. Users should acknowledge CIESIN as the source used in the creation of any reports, publications, new data sets, derived products, or services resulting from the use of this data set. CIESIN also requests reprints of any publications and notification of any redistributing efforts.

Keywords

CIESIN > Economic Activity > Income

CIESIN > Human Attitudes, Preferences, and Behavior > Consumer Behavior > Poverty

CIESIN > Human Attitudes, Preferences, and Behavior > Education

CIESIN > Population Dynamics > Demographic Characteristics > Place of Residence

CIESIN > Population Dynamics > Demographic Characteristics > Population Distribution

CIESIN > Population Dynamics > Demographic Characteristics > Population Size

Census Block

Households

Housing

Housing Age

Immigration

U.S. Census

Data Set Progress

COMPLETE

Originating Center

SEDAC

Data Center

Socioeconomic Data and Applications Center    [Information] Data Center URL: http://sedac.ciesin.columbia.edu/ Dataset ID: CIESIN_SEDAC_USCG_SF3 Data Center Personnel Name: SEDAC USER SERVICES Phone: +1 845-365-8920 Fax: +1 845-365-8922 Email: ciesin.info at ciesin.columbia.edu Contact Address: 61 Route 9W, P.O. Box 1000 City: Palisades Province or State: NY Postal Code: 10964 Country: USA

Distribution

Distribution_Media: ONLINE HTTP Distribution_Format: ASCII Fees: 0

Distribution_Media: ONLINE HTTP Distribution_Format: GeoTIFF Fees: 0

Distribution_Media: ONLINE HTTP Distribution_Format: PDF Fees: 0

Distribution_Media: ONLINE HTTP Distribution_Format: PNG Fees: 0

Personnel

SEDAC USER SERVICES Role: TECHNICAL CONTACT Phone: +1 845-365-8920 Fax: +1 845-365-8922 Email: ciesin.info at ciesin.columbia.edu Contact Address: 61 Route 9W, P.O. Box 1000 City: Palisades Province or State: NY Postal Code: 10964 Country: USA

CIESIN METADATA ADMINISTRATION Role: DIF AUTHOR Phone: +1 845-365-8988 Fax: +1 845-365-8922 Email: metadata at ciesin.columbia.edu Contact Address: 61 Route 9W, P.O. Box 1000 City: Palisades Province or State: New York Postal Code: 10964 Country: USA