Abstract: This paper describes the construction content of geographic entity, introduces the organization and expression form of geographic entity based on image unit distinguish, and compares the difference between traditional topographic map and entity data organization form. This paper analyzes the spatial and temporal variety characteristics of geographical entities, and expounds the characteristics of spatial consistency expression to geographical entities on ground objects. Based on the multi-source vector data, the method and steps of geographic entity fusion are designed, and the concrete application of the fusion results is introduced with the building entity as an example. This paper provides the reference for the study of geographic entities in GIS.

Key words: geographic entity, data organization, mulit-source vector, data fusion, application