Conceptual Modeling Method for Urban Low-Altitude Passage Easement
Low-altitude space is an important component of urban space. Requisite measures for precise and meticulous management of urban low-altitude are indispensable. The urban low-altitude space should be characterized by spatial coordinates and possess significant geographic attributes. With the increasing adoption of low-altitude applications in urban areas,the intricate utilization of space,represented by low-altitude traffic,has transcended conventional airspace boundaries and encroached upon near-ground urban space,exerting an impact on urban architecture and human settlement environment. Emphasizing the 3D land space's utilization and service,the issue of the utilization and management of 3D land space has become increasingly conspicuous. The land parcel serves as the fundamental unit for urban land management,recording information of ownership relationships,spatial rights,and interests information. The establishment of easements between land parcels ensures the lawful utilization of relevant spaces. Given the inclusion of low-altitude flight activities within the purview of urban land management,there is an urgent imperative to elucidate the spatial utilization and impact of low-altitude passage processes on land space while establishing the service rights of urban low-altitude passage to safeguard parcel interests. However,the concept of easement is limited by the cognitive constraints imposed by a 2D land plane,neglecting the modeling and representation of 3D space. Precisely articulating the easement relationship formed by low-altitude passage activities in urban low-altitude space poses a significant challenge.Utilizing GIS technology for modeling urban spaces and facilitating the characterization and mapping from the physical to digital realms has consistently served as a crucial information tool in urban space management. Drawing upon the core principles of GIS modeling methodology and conceptual modeling,this paper presents a conceptual approach for describing low-altitude passage easement in urban areas. By analyzing the movement conditions of aircraft in urban low-altitude traffic,considering the impact on human settlement rights caused by overflight,and examining the path utilization of aircraft in three-dimensional space,we develop a constrained spatial modeling for low-altitude passage easement as a geometric description of the conceptual model. By integrating the spatial characteristics of 3D land parcels,we integrate the supply and service conditions of these parcels in terms of their space utilization,aircraft takeoff and landing modes,and path utilization. As a result,we propose a comprehensive supply and service model to address the demand for traffic within 3D parcels. The semantic relationship among low-altitude planning,space value,and space easement is established by extracting the concept of low-altitude access from existing research and regulations,thereby forming a conceptual model. Finally,we conduct an experimental demonstration using a logistics transportation case study in Shenzhen to instantiate the model and achieve 3D visualization. The findings demonstrate that the integrated approach of "space utilization conditions-data modeling-visual expression",implemented around the conceptual model,effectively describes urban low-altitude passage easement and conveys the equitable relationship of urban land space in low-altitude application scenarios,thereby providing valuable support for urban low-altitude management.
urban low-altitude passageland space modelingspace easementlegal spacespatialization of constraintslow-altitude passage planninglow-altitude easement valuationeasement service pattern3D visualization
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