Study on Spatio-temporal Data Model About Feature-version
The characteristic of traditional spatio-temporal data model is discussed. Supported by Geodatabase, a spatio-temporal data model based on Feature-version is designed. The logical relations of time and storage structure of model is described in detail. The model decreases the storing spaces, keeps the integrity of geographic phenomenon and has efficiency of query. Spatio-temporal database and TGIS of ZhaLong wetland is built subsequently. It manages wetland spatio-temporal data effectively through the realization of historical reconstruction, the development or review of geographic object and spatio-temporal query.