Evaluation of the Positional Accuracy of the Sentinel-2 Mosaic for Analysis of Applicability in Updating the Continuous Cartographic Base on the Scale 1: 100,000 (BC100)

Abstract

The availability of geotechnologies has stimulated the production and consumption of spatial information, increasing the need for validations to guarantee cartographic quality. This article aims to evaluate the application of images from the Sentinel-2 satellite, which can be obtained free of charge and in the form of a time mosaic by the Google Earth Engine (GEE) platform, for updating the Continuous Cartographic Base on a scale of 1: 100,000 ( BC100) of the Brazilian Institute of Geography and Statistics (IBGE). The planimetric positional accuracy was evaluated, using an IBGE orthomosaic as a reference, with a spatial resolution of 1 m, using the Double Buffer linear feature method. The routes of the Federal Rural University of Rio de Janeiro (UFRRJ), Seropédica campus, were analyzed in the reference image and in the mosaic under test, and then the discrepancies obtained were evaluated, considering the Cartographic Accuracy Standard for Digital Cartographic Products (PEC-PCD) and Standard Error (EP), were obtained as class A result of the PEC-PCD. The approval of the temporal mosaic formed by pixels of different days motivated the validation of the raw files referring to the same scene of the satellite in question and of the mosaic obtained by the Sentinel Hub platform (EO Browser), both formed by pixels of the same day. Analysis of Variance (ANOVA) was applied to compare the discrepancies between the images and it was concluded that there are no statistically differences. Showing that for the study area, taking into account the pathways, the raw images from Sentinel-2, GEE temporal Mosaic and Sentinel Hub Mosaic are applicable for updating the BC100.