To provide an open access, well documented global data set of roads between settlements using a consistent data model (UNSDI-T v.2) which is, to the extent possible, topologically integrated.

To provide a geographically explicit and reliable database of dams for the scientific community.

To provide a geographically explicit and reliable database of reservoirs for the scientific community.

To provide the ATSDR polygon data set of hazardous waste sites in the United States, Puerto Rico, and other territories which can be used to identify nearby populations and assess their potential risk.

To provide documentation on roads data sets that are potential candidates for inclusion in the Global Roads Open Access Data Set (gROADS), and which may be useful to others searching for data on road infrastructure.

To provide a set of coastlines consistent with GPWv3 raster data for cartographic purposes.

To provide maps of the input administrative units used in GPWv3.

To provide a raster representation of nation-states in GPWv3 for use in aggregating population data.

To provide a quantitative measure of the input resolution of administrative units used for GPWv3.

To provide a quantitative measure of the input resolution of administrative units used for GPWv3.

To provide a vector (point) version of the input administrative units used in GPWv3 for use in data integration.

To provide a database of public China maps, searchable by location, scale, content, publisher, and publication date.

To provide a dynamic matrix for the identification of spatially and temporally-specific data on Chinese administrative units.

To provide a database of works pertaining to the administrative geography of China, searchable by location, time, and subject matter.

To provide county-level social information of China in a series of tables from the China Provincial Economic Yearbook data for 1990 and 1991.

To provide fundamental GIS maps of China, and neighboring countries and regions.

To provide information of geographical locations, areas, administrative division codes, and names for the administrative regions of China.

To provide information on the geographical locations, areas, administrative division codes, and names of the administrative regions of China.

To provide county and state boundary data for the U.S.

To provide an authoritative boundary layer for the geographies associated with the Public Use Micro Sample (PUMS) data files.