Title: Central American Vegetation / Land Cover Classification and Conservation Status Date: Geography: Central America Publisher: Center for International Earth Science Information Network, Columbia University Availability: Freely available for all to download from the web. More info. Title: China Dimensions Data Holdings Date: Geography: China Publisher: Center for International Earth Science Information Network, Columbia University Availability: Freely available for all to download from the web. More info. Title: Georeferenced Population Data Sets of Mexico Date: 1990 Geography: Mexico Publisher: Center for International Earth Science Information Network, Columbia University Availability: Freely available for all to download from the web. More info.