The Basic Theory and Framework system of Electronic Map
Long Yi1,Jiang Chenhuan2,Zhang Liang1,Zhou Wei1 (1 Key Lab. of Geographic Information Science of Jiang Su Province, Nanjing Normal University, 210097; 2 School of Resources and Environmental Science, Wuhan University,Wuhan 430070)
As a new style of map product in modern cartography, electronic map (EM) is not only a kind of product, but also a change of a series of theories, technologies and methods. Beginning with the concept and contents of EM, this paper discusses the relations of EM and traditional map, digital map and GIS, and its framework to support the building, expression and application of EM.