The Study and Development of Electronic Maps in China
LIU Yue (Institute of Geogrophic Sciences and Natural Resources Reseach, CAS, Beijing 100101, China)
The article summarizes the study of electronic maps and offers direction of development. It includs three sections. The first one, introduces the status of electronic map production. The electronic maps and atlases produced and published in China consist of three types, that is, reading type, interactive type and network type. The second one is about building system of electronic map. It introduces the model of electronic maps by adopting object-oriented approach; discusses how to establish the designing template of map layer and how to develop software system (EA-world) of electronic maps; and identifies some problems in designing electronic maps. The third one, points out the direction of development of electronic maps. it suggests to strengthen theoretic research in modern cartography in order to guide the production of electronic maps; to carry out study on web-cartography in order to share map information jointly; and to do more works in designing data model in order to improve the quality of electronic maps.