Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Urban Extents GridEntry ID: CIESIN_SEDAC_GRUMPv1_EXT
Abstract: The Global Rural-Urban Mapping Project, Version 1 (GRUMPv1) consists of estimates of human population for the years 1990, 1995, and 2000 by 30 arc-second (1km) grid. The urban extent grids distinguish urban and rural areas based on a combination of population counts (persons), settlement points, and the presence of Nighttime Lights . Areas are defined as urban where contiguous lighted cells from ... the Nighttime Lights or approximated urban extents based on buffered settlement points for which the total population is greater than 5,000 persons. This dataset is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with the International Food Policy Research Institute (IFPRI), The World Bank, and Centro Internacional de Agricultura Tropical (CIAT).
The data in ARC/INFO Binary Grid (GRID), American Standard Code for Information Interchange (ASCII), Band Interleaved by Line (BIL) formats and maps in Portable Document Format (PDF) and Portable Network Graphics (PNG) formats are available from the NASA Socioeconomic Data and Applications Center (SEDAC).
Purpose: To provide a raster representation of urban areas (or urban mask) for use with GRUMP population grids or other data sets.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Center for International Earth Science Information Network (CIESIN)/Columbia University, International Food Policy Research Institute (IFPRI), The World Bank, and Centro Internacional de Agricultura Tropical (CIAT)
Dataset Title: Global Rural-Urban Mapping Project, Version 1 (GRUMPv1): Urban Extents Grid
Dataset Release Date: 2011
Dataset Release Place: Palisades, NY
Dataset Publisher: NASA Socioeconomic Data and Applications Center (SEDAC)
Data Presentation Form: raster, mapOnline Resource: http://sedac.ciesin.columbia.edu/data/set/grump-v1-urban-extents
Start Date: 1995-07-01Stop Date: 1995-07-01
Quality The measurements were made simultaneously using four Trimble 4000 SSE and one
4000 SST GPS receivers on the five survey points. The rapid static survey was
based on 12 measurements of 30 minutes duration each, and two hours intervals.
Two different softwares were used to elaborate the data: Topas Turbo and
GPSurvey. Topas Turbo solutions has a more regular trend, that's because the
Topas Turbo algorithm is probably more appropriate where the measurements are
Use Constraints Property of PNRA for 5 years
Data Set Progress
Distribution Media: CDROM
Distribution Format: PC - DOS - ISO 9660
Fees: Free after 5th year
Creation and Review Dates
DIF Creation Date: 2004-02-23
Last DIF Revision Date: 2008-05-30