Study on Data Exchange among Heterogeneous Database in Geographic Information System
Liang Ai-min · Zhongguo tiedao kexue · 2004
Too much information exchanged is the major characteristic of data exchange in distributed GIS. The data exchange communication platform (DECP) is put forward as the middle layer to realize data exchange and transmission among heterogeneous database. DECP is made up of data access layer, business logic layer, security proxy, data transport proxy, client proxy, messages layer and transactions manager. The key technologies adopted by DECP mainly are the security technology based on proxy, the technology of system scheduling, the technology of accessing heterogeneous database management systems and the technology of transaction management and scheduling.