Atualização de bases cartográficas antigas para fim de cadastro técnico urbano por meio de aplicação do plano topográfico local

Abstract

The efficiency of the Urban Technical Cadastre is totally linked to the accuracy of its cartographic base. This cartographic base is assembled by topographic, geodetic or aerophotogrammetric surveys and requires a coordinate system and a geodetic reference system to validate their information. And this is where the biggest problems lie, as the positioning systems have evolved as well as the need to adapt or modify the geodetic reference system. These modifications contributed to the obsolescence of the cartographic data of several Brazilian municipalities due to the lack of a constant update or the difficulty of communication between the cartographic data. Currently the coordinate system adopted for mapping in Brazil is the UTM, however, this system does not guarantee the communication of projects at different times and its coordinates change when the geodetic reference is changed, making it impossible to obtain a single coordinate for the same vertex in any reference system. In this sense, the present work has the purpose of presenting the Local Topographic Plan (PTL) as the most appropriate coordinate system for the updating and creation of cartographic bases, because when adopted it is possible to guarantee that a coordinate system is being used that does not change and is unchanged in geologically stable areas because of its strictly local character. If there is a change in the country's geodetic reference system, all that is required is to adjust the transformation parameters.