A spatiotemporal identifier coding method of polygon geo-entity based on global subdivision grid
Aiming at the problems of fuzzy spatial location information in existing geographic entity coding,a spatiotemporal identifier calculation model based on global subdivision grid was proposed in this paper.This model could only rely on sequence numbers to achieve spatial grid encoding uniqueness and had the disadvantage of randomness.The spatiotemporal identifier of geographical entities calculated by this model could achieve the determination of global unique identification of geographical entities in smart cities,spatial association of different geographical entities.Taken Zuojiazhuang Street,Chaoyang District,Beijing as the experimental area,the proposed algorithm was compared with the bounding rectangle algorithm and surface overlap algorithm.Experimental results showed that the proposed algorithm uniquely identified geographical entities in smart cities,and the data association efficiency was significantly better than the area overlap algorithm by 10 times.In the experimental area,the success rate of data matching based on this algorithm was 100％,which could effectively support the spatiotemporal identifier and coding of smart cities,and had reference for the management and service of smart city entity data.
grid subdivisiongeo-entityspatiotemporal identifierentity association
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