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Demographic Data Cartogram U.S http:// plue.sedac.ciesin.org/ plue/ddcarto Demographic Data Cartogram U.S. Census Data for GIS Users Overview Mapping geographic distributions of socioeconomic data products with remote socioeconomic data is essential for a sensing data on land cover and use. range of Geographic Information System (GIS) users, including re- Data searchers, public agencies, and busi- nesses. A common problem is that DDCarto provides access to boundary data are not readily accessible in data at block, block group, tract, and formats compatible with popular county levels from the 1992 TIGER desktop GIS software packages. Now, (Topographically Integrated Geographic the Demographic Data Cartogram Encoding and Reference) files. These (DDCarto) service provides easy may be linked with more than 200 access to U.S. census boundary data in variables derived from the 1990 U.S. GIS format via the Internet. Census Summary Tape File (STF) 3A. Topics covered include: DDCarto supplies GIS coverages for the U.S in three different formats: • general population • persons by sex, race and age ® • ".bna" (Atlas*GIS ) • households by size, type, and income ® • ".e00" (ARC/INFO ) • families by number of workers ® • ".mid" and ".mif" (MapInfo ) • level of education, occupation World Data Center-A • housing units, age, and value for Human Interactions Users may obtain census geography in the Environment boundaries for any location in the Not all variables are available at the United States. Users may also acquire block level. socioeconomic attribute data for each coverage. The data are accessed from Users CIESIN’s Archive of Census-Related Products. DDCarto is a valuable resource for users DDCarto is one of several services of desktop mapping and GIS software, provided by SEDAC’s Population, including state and local planners, Land Use and Emissions Data Project. corporations, marketing firms, non-profit Columbia University This project is a unique effort to link organizations, educators, students, and in the City of New York georeferenced demographic and other natural and social scientists. Demographic Data Cartogram State Selection Access DDCarto may be accessed via the Internet at the Uniform Resource Locator (URL): http://www.ciesin.org http://plue.sedac.ciesin.org/plue/ddcarto CIESIN User Services GIS data files are stored in Atlas*GIS® Select a state [email protected] export format and in the Archive of 1-914-365-8920 Census-Related Products Census Area Selection 9 a.m. - 5 p.m. and may be retrieved U.S. Eastern time directly from the file transfer Monday through Friday protocol (ftp) site: ftp://ftpserver.ciesin.org/ CIESIN pub/census/ Columbia University PO Box 1000 Files in ARC/INFO® or 61 Route 9W MapInfo® format must be Palisades, NY 10964 converted. Conversions are USA processed overnight, and the user is sent electronic mail 1-845-365-8920 with instructions to pick up 1-845-365-8922 (fax) the data via ftp when ready. Data Confirmation Sample data selection and retrieval process from DDCarto. Age of Housing Stock in Saginaw-Bay City-Midland Michigan, 1990 The map shows the median year that houses were built in Saginaw-Bay City-Midland, Michigan at the block group level as of 1990. It was produced in ArcView ® from DDCarto data. This service is provided by the Center for International Earth Science Information Network at Columbia University through its Socioeconomic Data and Applica- tions Center (SEDAC). SEDAC is supported by the National Aeronau- tics and Space Administration (NASA) under contract NAS5-98162. CIESIN and CIESIN's world map logo are registered trademarks of the Trustees of Columbia University in the City of New York. (12/98) ARC/INFO, ArcView, and Atlas*GIS are registered trademarks of Environmental Systems Research Institute. MapInfo is a registered trademark of Map Info Corporation..
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