Abstract: In order to meet the need of multi-source heterogeneous spatial data matching during emergency mapping, this paper provides a solution about unified coding of geographic entities from different datasource. Combining open location code and the geometric features of geographic entities, a method of multi-resources data merging is proposed by unifying the code of different geographic entities and their geometric features, along with a similarity calculation model. This method can be applied to GIS data matching and fusion, vector data update, emergency data fusion process, and the matching and fusion of POI in fundamental geographic information and Map World navigation data, which provides data for emergency mapping in the future.

Key words: geographic entities coding, multi-resources data merging, open location code, similarity calculation model