Discussion Cadastral Survey of the Underground Space of the 3D Cadastre

With the development of the three-dimensional cadastre,plane parcel is being replaced by spatial parcel." Cadastral survey specification" based on the two-dimensional plane can not meet the demand of cadastral survey in underground space.New technology such as 3D laser scanning technology provides the possibility of cadastral surveying and mapping in underground space.In order to eliminate the blind area of surveying and mapping data in underground,it must establish the effective data sharing mechanism.Parcel sketches in IC card can provide more comprehensive and detailed parcel information.