Metodología para obtener cartografía de precisión a escala 1:1000 y 1:10000 a partir de imágenes satelitales y sensores UAV para los municipios Boavita e Iza en el departamento de Boyacá; correspondiente al contrato Consorcio Canadiense - IGAC 2021

Abstract

Taking into account that the Agustín Codazzi Geographic Institute (IGAC) is the governing body for cartography at the national level and that it is developing the multipurpose cadastre, it is necessary to have updated information on the country and for this, cartographic products such as orthophotomosaics of various municipalities of the country are generated, however, in the case of said internship, the municipalities of Boavita and Iza of the department of Boyacá will be taken into account. The objective of this document is to capture the photogrammetric process (GNSS processing, aerial triangulation, photogrammetric restitution, obtaining the DTM, generation of orthophotos, preliminary mosaic (editing of seam lines and radiometric adjustment) and finally the orthophotomosaic), as well as the validation of said supplies through positional accuracy by means of the Square Mean Error (RMSE). On the other hand, the ideal photocontrol design will be reflected in these municipalities where the "hexagonal methodology" implemented in the consortium is taken into account, in order to obtain an equidistant distribution of control and check points over the entire work area. Now, making a rebuttal to IGAC resolution 471 of 2020 and its updates, resolutions 529 of 2020 and 197 of 2022, it is shown through iterations, the results obtained for the RMSE taking into account a minimum amount of 4 points of control up to 16 control points where it is evident that the RMSE, after a certain number of points positioned in the field, its result does not vary to a great extent (mm), for which it is concluded that 20 check points are not necessary as well as what stipulates the IGAC regulations to obtain quality inputs that meet the needs of precision work.