LandXML Encoding of Mixed 2D and 3D Survey Plans with Multi-Level Topology†Reportar como inadecuado


LandXML Encoding of Mixed 2D and 3D Survey Plans with Multi-Level Topology†


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1

Department OTB, GIS Technology Section, Delft University of Technology, P.O. Box 5030, 2600 GA Delft, The Netherlands

2

Singapore Land Authority, 55 Newton Road, #12-01, Revenue House, Singapore 307987, Singapore



This paper is extended from the version presented at the 5th International FIG 3D Cadastre Workshop, Athens, Greece, 18–20 October 2016.





*

Author to whom correspondence should be addressed.



Academic Editors: Efi Dimopoulou and Wolfgang Kainz

Abstract Cadastral spatial units around the world range from simple 2D parcels to complex 3D collections of spaces, defined at levels of sophistication from textural descriptions to complete, rigorous mathematical descriptions based on measurements and coordinates. The most common spatial unit in a cadastral database is the 2D land parcel—the basic unit subject to cadastral Rights, Restrictions and Responsibilities RRR. Built on this is a varying complexity of 3D subdivisions and secondary interests. Spatial units may also be subdivided into smaller units, with the remainder being kept as common property for the owners-tenants of the individual units. This has led to the adoption of hierarchical multi-level schemes. In this paper, we explore the encoding of spatial units in a way that highlights their 2D extent and topology, while fully defining their extent in the third dimension. Obviously, topological encoding itself is not new. However, having mixed a 2D and 3D topological structure is rather challenging. Therefore, despite the potential benefits of mixed 2D and 3D topology, it is currently not used in LandXML, one of the main and best documented formats when representing survey data. This paper presents a multi-level topological encoding for the purposes of survey plan representation in LandXML that is simple and efficient in space requirements, including the question of curved surfaces, partly unbounded spatial units, and grouping and division of 2D and 3D spatial units. No -off the shelf- software is available for validating newly lodged surveys and we present our prototype for this. It is further suggested that the conceptual model behind this encoding approach can be extend to the database schema itself. View Full-Text

Keywords: 3D cadastres; survey plans; LandXML; InfraGML; multi-level topology; geographic information systems; rights; restrictions; responsibilities; spatial data infrastructure; real property 3D cadastres; survey plans; LandXML; InfraGML; multi-level topology; geographic information systems; rights; restrictions; responsibilities; spatial data infrastructure; real property





Autor: Rodney James Thompson 1,* , Peter van Oosterom 1 and Kean Huat Soon 2

Fuente: http://mdpi.com/



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