Levantamento planialtimétrico e cadastral utilizando aerofotogrametria para fins de parcelamento do solo no município de Teresina/PI

Abstract

Urban land subdivision requires detailed knowledge of the tract's topographical and environmental characteristics, as determined by Federal Law No. 6,766/1979, necessitating a precise topographic survey. This study aimed to perform the planialtimetric and cadastral survey of the boundaries of an urban property, specifically the Rectory of the Federal Institute of Piauí (IFPI) in Teresina, Piauí, in order to support a land subdivision project. The methodology employed combined the use of high accuracy GNSS technology for collecting ground control points using the static relative method and an aerial photogrammetric survey utilizing a DJI Mavic Air drone. Processing was performed using Agisoft Metashape and QGIS software, resulting in a georeferenced orthomosaic (SIRGAS2000 datum, UTM Zone 23 South) with a GSD of 2.71 cm/pix. The product's accuracy was confirmed by the Root Mean Squar e (RMS) Error of the control point set, showing a total error of 25.1 cm, thus validating the topographic precision. The cadastral mapping, covering an area of 11,296.89 square meters, provided a reliable cartographic base for the campus's property management and the planning of future infrastructure projects. It is concluded that the integration of GNSS and aerial photogrammetry techniques proved efficient, producing a detailed cadaster that meets the legal and technical requirements for urban land subdivision, with the future implementation of a Geographic Information System (GIS) for continuous property management being suggested.