This paper introduces a car-borne road information collecting and updating system (LD2000) developed by Wuhan Technical University of Surveying and Mapping.This
An improved topographic database for King George Island,one of the most frequently visited regions in Antarctica,is presented.A first step consisted in combinin
Geographical Information System (GIS) is widely used in many fields.With the rapid development of computer network,GIS users care more about data sharing in net