Operacionalidade de aplicativos de smartphone para mensuração de altura de árvores em região de ecótono Cerrado-Amazônia.

De Angeli CURTO, Rafaella; Paz DEECKEN, Bruna; Valerio KOHLER, Sintia; Cristina BIAZATTI, Scheila; de ARAÚJO, Emanuel José Gomes; WINK, Charlote; MÔRA, Rômulo

The objective verify the operability of smartphone applications comparing them with traditional hypsometer of proven efficiency in the measurement of total height of trees in forest fragment. The Vertex IV® Hypsometer was used as a real measure of total height, due to the impossibility of obtaining the variable directly. 90 trees were randomly selected, distributed equally in three height classes: 1 (9.0-15.9 m); 2 (16.0-22.9 m); and 3 (> 23.0 m). To estimate total height, the following applications (Apps) were used for smartphones with Android operating system: Two Point Height (T.P.H); Measure Height (M.H); Smart Measure (S.M) and Hypsometer (HR). All tested applications, as they result in average heights statistically equal to the average obtained with the Vertex®, can be indicated for the measurement of trees in the different height classes. The Bias (V), Mean of Absolute Differences (MD), Standard Deviation of Differences (DPD) and Mean Square Error (RMSE) statistics indicated, considering all applications, that the Hypsometer presented a less tendentious and more homogeneous distribution of residues, besides a smaller average error. Upgrading applications, accelerometer resolution, and tailored care were key determinants of application performance as a viable alternative for tree measurement in terms of cost and efficiency.

Nativa, 2019, Vol 7, Issue 2, p218

2318-7670

Academic Journal

10.31413/nativa.v7i2.6310