Levantamento de limites de imóvel rural a partir de fotografias obtidas por VANT, apoiadas por pontos GNSS

Abstract

With the popularity of UAVs (Unmanned Aerial Vehicles), the aerial photography methaod for mapping small areas has become an increasingly viable alternative, providing spatial resolution adequate to its end. In this study, the georeferencing of rural properties, based on aerial photographs covering using UAV, it wasdeveloped in an area of approximately 80 ha. Was developed as a proposition of indirect measurement of natural boundaries in areas of difficult access and as an alternative to geodetic survey with GNSS receivers, in order to comply with accuracy requirements set out in INCRA’s Technical Manual of Positioning. In the implementation stage, data collection was made with use of GNSS receivers and photogrammetric survey with a small UAV for planimetric mapping. As a result of the photogrammetric process, an orthophoto and a planimetric map resulting of the vectoring of the ortophoto ware generated. For quality control, a comparison was made with coordinates of the points in the orthophoto and the map with the coordinates of homologous points on the ground, coming to an accuracy of 0.279 m for 90% of the extracted coordinates of the orthophoto and 0.281 m for the resulting coordinates of the map. These values are compatible to INCRA’s Technical Standard, which requires precision of 3.0 m for natural limits and 7.5 m for inaccessible limits. Quality control was based on Cartographic Accuracy Standard for Digital Cartography (PEC-PCD) and, through statistical test, it was found that the product can be classified in Class A in scale 1:1,000.