Discussion on Key Technologies of Geographic National Conditions Monitoring

The geographic national conditions monitoring is an important mission of the spatial information science in the new era.In this paper,the necessity and contents of the geographic national conditions monitoring are discussed.Moreover,the role and difficulties of corresponding key technologies,including multi-platform remote sensing,global satellite navigation and positioning,grid GIS,geographic information network services,multi-dimensional spatio-temporal data mining and cloud computing,are deeply analyzed.Finally,some proposals are given for routine monitoring and emergency monitoring of the geographic national conditions.