Unoccupied Aircraft Systems (UAS) are beginning to replace conventional forest plot mensuration through their use as low-cost and powerful remote sensing tools for monitoring growth, estimating biomass, evaluating carbon stocks detecting weeds; however, physical samples remain mostly collected time-consuming, expensive potentially dangerous techniques. Such techniques include the of arborists c...

Tree height is a fundamental measurement in forest inventory studies and critical variable for the assessment of tree biomass, carbon stock site productivity. However, measuring often challenging task may generate errors. This study provides an accuracy analysis heights measured through different methods ranging from traditional techniques (thumb rule stick method) to trigonometric equipment (c...

1. INTRODUCTION. In the beginning of the twelfth century CE, an interesting new geometry book appeared: The Book of Mensuration of the Earth and its Division, by Rabbi Abraham Bar Hiya (acronym RABH), a Jewish philosopher and scientist. This book is interesting both historically and mathematically. Its historical aspect is discussed in [3]. In this paper we consider the mathematical aspect. The...