Abstract
Abstract. Algeria faces challenges of globalization. It classifies the establishment of the national general urban and rural territory cadastre as top priority. The National Cadastre Agency has implemented a policy aimed at improving the quality and accuracy of the resulting documentation, in order to widen the scope of the latter in the various fields.Since the launching of the first operations to establish the general cadastre of the national territory, the graphic cadastral documentation which was carried out based on aerial images (ortho-photographs or restitution plans) present mismatch either between the external borders or between the section plans that compose the communal (municipal) cadastral plane.This article describes one of the simultaneous plane adjustment techniques inspired by the aero triangulation used in photogrammetry. In a first step, we built the photogrammetric unit where we consider the cadastral planes as photogrammetric models. In a second step, the constructed units will be used to form a superstructure covering a very large area like in the photogrammetric block case. Finally, this superstructure is adjusted, where the discrepancies are reduces relatively between these section plans using Tie Points (TP) and absolutely by relying on an optimal number of Ground Control Points (GCP) in the terrain system suitably distributed on the block.This technique makes it possible to preserve the relationships between the data in a precise way and to guarantee the continuity in the acquisition of the data which can be added later. It also makes it possible to solve the problem of the overlap between the isolated section plans due to the non-optimal distribution, the insufficiency, or the absence of control points.The evaluation results obtained after the experiments report that the proposed adjustment technique is efficient to solve such a problem.
Highlights
The cadastral plan represents the municipal territory with the collection of the legal information necessary for the identification of the owners, which ensures good management, and an exact representation of the national territory at large scales.A detailed representation in the form of orthophotography or restitution plans facilitates land reforms, real estate transactions, and ensures security of tenure
For the evaluation of the adjustment method we used two different datasets, the first one are cadastral sections scanned at 300 DPI and at the scale 1/5000 of a rural area acquired from the local cadaster direction
The first is the georeferencing of a set of section plans, these plans have coordinates and ticks that can be used as control points for the simultaneous block georeferencing
Summary
The cadastral plan represents the municipal territory with the collection of the legal information necessary for the identification of the owners, which ensures good management, and an exact representation of the national territory at large scales.A detailed representation in the form of orthophotography or restitution plans facilitates land reforms, real estate transactions, and ensures security of tenure. The cadastral plan represents the municipal territory with the collection of the legal information necessary for the identification of the owners, which ensures good management, and an exact representation of the national territory at large scales. Each municipality territory is split into cadastral sections. A cadastral section, by definition, is a part of the municipality territory delimited by relatively permanent landscape elements and that can be represented on the scale of 1/5000 in a standardized sheet format (51.4cm*76cm). These sections are made based on orthophotos of the same scale covering the whole municipality
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