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Development of an application to refine the parcel lots map to preserve the legal areas, and perimeter lengths and prevent interference via an over-constrained least squares estimation method
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Alireza Safdarinezhad *   |
| Tafresh University |
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Abstract: (151 Views) |
Field surveying, large-scale aerial maps, or digitizing paper maps are considered sources of spatial information in the legal registration of real estate and cadaster systems. Uncertainties related to extracting spatial information from each of these sources create inconsistencies with registered legal-geometrical contents. Differences between boundary lengths and areas of cadastral parcels(s) with registered documents are examples of such interferences. When the geometric entries are correct, aligning the cadastral maps with these legal propositions is one of the technical tasks taken by surveyor experts and registry affairs. In this process, the positions of vertices of cadastral parcels are manually adjusted in such a way that, without causing interference among cadastral parcels, the legally registered areas and boundaries match the existing maps. The quality of this procedure depends on the experience and patience of the expert, and uniform results do not occur upon repetition of this process. In this research, an interactive application has been developed to refine initial maps from cadastral parcel(s) with the aim of matching them with the legally registered boundaries and areas. In this method, existing cadastral maps are used as the basis for extracting observations and registered geometric contents as constraints in the refinement process of parcel(s) vertices. This application allows imposing various geometric constraints, including preserving the parcels’ area, preserving all or part of their boundary’s length, collinearity of some vertices, and also fixing some directions and points. Utilizing of this method can simplify operational tasks related to cadastral affairs and surveyors. It can also prevent the need for tedious manual refining procedures. The results demonstrated that the initial cadastral maps were refined with greater accuracies than map scale uncertainties and surveying tools. Another technical feature of this application is its ability to be used in the process of separating and dividing land, which has been proven effective in various examples.
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| Keywords: Cadaster map, Map refinement, Parcel fixing, Separation, Registered boundary length and area, Property documents |
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Type of Study: Research |
Subject:
Surveying Engineering
Received: 2024/10/1 | Accepted: 2025/01/4 | ePublished ahead of print: 2025/02/2
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