Research and practice on key technology of natural geographic entity collection in Beijing
The paper studied the production process and key technologies of natural geographic entity data in Beijing by employing frame stereoscopic images and land change survey data of City Mapper-2 software in 2022 as the main data sources. Based on the engineering practice of natural geographic entity production in Huairou Science City,this paper elaborated on the realization process of key technologies such as the collection of mountain and water map elements,the conversion of agricultural and forestry land and soil stock data,the elevation assignment and entity relationship construction. Finally,a set of practical natural geographic entity construction process flow was formed. The results show that the technical route explored in this paper provides technical references for the same type of natural geographic entity production projects. The plane accuracy of the constructed geographic entity is 0.21 m,and the elevation accuracy is 0.26 m,which effectively ensures product accuracy and timeliness,and promotes the transformation of the traditional single-scale database into a materialized and integrated spatio-temporal database.
new fundamental surveying and mappingnatural geographic-entityaerial imageland change survey dataentity construction
万方数据
维普
