US MAP LIBRARY provides about 200 millions online statistical maps on population, economy, geography, environment, education, health, industries , and business of US at state, metropolitan, county, place, tract and block levels. Users can export the map to PDF or graphic files or save the original data into Excel files.   公开版：http://usmaponline.org/MapLibFree/home   注册版：http://usmaponline.org/

China Geo-Explorer (CGE) fully integrates different data sources from government statistics, population census and economics census of China at different levels (province, city, county, township and ZIP code) into a spatial system with more than 6,000 comparable variables for easy access.The features of this online service include: Efficient data integration for spatial, non-spatial data and text data Flexible data selection by administrative units, locations, and spatial ranges Intelligent location analysis and spatial assessment Quick identification of spatial patterns and...

A free tool for users to make mpas online with their own attribute data and the base maps of US and China available in the spatial system. http://spatialdataonline.org/

CHINA MAP LIBRARY provides about 8 million online statistical maps on population, economy, geography, environment, education, health, industries , and business of China at province, prefecture city, county and township levels. Users can export the map to PDF or graphic files or save the original data into Excel files. 公开版：http://chinamaponline.org/MapLibFree/home 注册版：http://chinamaponline.org/

US Geo-Explorer (UGE) fully integrates the population census and business data of the U.S. from different years at different levels (state, metropolitan, county, CCD, place, tract and block) into a spatial system with more than 40,000 comparable variables for easy access.The features of this online service include: Efficient data integration for spatial, non-spatial data and text data Flexible data selection by administrative units, locations, and spatial ranges Intelligent location analysis and spatial assessment Quick identification o...