Precisão e exatidão geodésica em dispositivos móveis utilizando um software de navegação para atividades em campo

Assessment of Geodetic Accuracy and Precision of Mobile Devices Using Navigation Software Under Field Conditions

Abstract

Knowledge of spatial variability and localized treatment are two extremely important elements in Precision Agriculture (PA) and can be obtained by sampling and evaluating the collected spatial data. The mode of collection and evaluation is conditioned to the attribute or property under study and, sometimes, high precision equipment is not required for collection. Such devices have a high cost when compared to low-precision global navigation satellite system (GNSS) equipment, such as cell phones. This study aimed to evaluate two mobile devices, a cell phone and a tablet, through the navigation and location of the points with the SNAC system, using an Reference station to evaluate precision and accuracy. The data were presented as scatter plots and evaluated by statistical techniques on the means related to the collected data. In the location of the points, the man accuracy of the equipment was close to 1 m, making it possible to be used in agricultural activities whose required accuracy is not higher than this value. The results also suggest that the accuracy is statistically higher when the tests are carried out in the morning.