Avaliação das características dos smartphones na mensuração da altura total de árvores de eucalipto

Abstract

The objective was to compare different smartphones and applications in measuring the total height of trees in an 84-month-old eucalyptus plantation. The evaluation was conducted on 30 randomly selected trees in a 0.12-hectare plantation in Sinop, Mato Grosso. The actual total height was obtained using the Vertex IV® Hypsometer, and the estimated total height was measured with two applications across six smartphone devices. Data were analyzed for normality and homogeneity, and an independent samples t-test was performed at a 1% significance level, along with descriptive statistics, graphical residual analysis, and complementary analysis. No significant difference was observed between the mean total height (m) estimated by the technologies compared to the total height (m) obtained with the Vertex IV® Hypsometer. However, the best-performing smartphones were the Galaxy A51®, Motorola Moto G20®, and LG K51S®. Among the applications, Hypsometer® was the most effective. It was concluded that smartphones and applications were efficient in estimating the total height (m) of eucalyptus trees, but depending on the application used, certain smartphones are not recommended for height measurement due to their specific characteristics