Comparative Analysis of Positional Quality Control Standards for Cartographics Products in Brazil, INCRA and ASPRS

Abstract

Over the past few years there has been a significant increase in applications with Remote Piloted Aircraft (RPAs) in the area of ​​Cartography, which makes it necessary to know the quality obtained in such applications. Therefore, institutions from different countries have developed standards in order to assess the quality of geospatial products. In addition, they have also developed other standards with the purpose of encompassing positioning accuracy standards for digital orthoimages. In this sense, the purpose of this article was to compare three standards that address positional quality control applicable to RPA: (i) ET-CQDG (Decree No. 89,817); (ii) the INCRA Execution standard No. 2 of 2018 and; (iii) the ASP RS standard. In the practical experiment, the process of evaluating the positional accuracy of an orthofto obtained by RPA in the region of Janaúba-MG was carried out. The orthophoto was classified in class A for the scale of 1: 1000 for the standard ET-CQDG. For the ASPRS at the 95% confidence level, the product had a positional accuracy of 0.428 meters and, according to the INCRA standard, the points obtained by RPA can be used for georeferencing considering all types of limits. Through the results obtained, it was possible to infer that the standards need an improvement in their methodologies, so that this whole process is done in a clear and objective way for the producer and the user.