Li Deren's research direction

In 1980s, Li Deren mainly engaged in the research of measurement error theory and processing methods.

Since 1990s, Li Deren has been devoted to spatial information science and multimedia communication technologies represented by 3S systems (remote sensing (RS), global positioning system (GPS) and geographic information system (GIS)).

2 1 century, Professor Li Deren put forward the concept and theory of spatial information grid in broad sense and narrow sense, and actively promoted the management and service of urban grid. Unique achievements have been made in high-precision photogrammetry positioning theory and method, GPS aerial triangulation, SPOT satellite photo analysis and processing, mathematical morphology and its application in survey database, object-oriented GIS theory and technology, image understanding and photo automatic interpretation, spatial data mining, 3S technology integration, multimedia communication and so on.