综合型（Integrated）

 1) GeoNetwork

http://www.fao.org/geonetwork/srv/en/main.home

 2) NASA Socioeconomic Data and Applications Data Center(SEDAC)

http://sedac.ciesin.columbia.edu/data/sets/browse

--生态学（Ecology）

#土地覆盖（Landcover）

 1)USGS science for a changing world--The USGS Land Cover Institute (LCI）  

http://landcover.usgs.gov/landcoverdata.php

 2) esea data use element global land cover  

http://dup.esrin.esa.int/globcover/

 3) European Comission Joint Research Centre Land Resource Management Unit--Global Land Cover 2000 - products

http://bioval.jrc.ec.europa.eu/products/glc2000/products.php