DRONE FOR FOREST MEASUREMENT, DRONE SYSTEM, AND PROGRAM

To accurately measure tree heights of trees in a forest.SOLUTION: A drone for measuring tree heights of trees comprising a forest includes: a measurement part emitting light to the trees and measuring heights; a moving part moving the drone from a bottom surface to a plurality of measuring positions in order in a tree standing direction of the trees; a calculation part calculating a first maximum height measurable within a measuring range on the basis of a measuring range by the light; a first measurement position setting part which makes a first measurement position to be a measurement position nearest the bottom surface a half of the first maximum height from the bottom surface, of the measurement positions; a second measurement position setting part which adds the first maximum height to a previous position to be a previous measurement position to obtain a second measurement position to be any of measurement positions excluding the first measurement position, of the measurement positions; and a tree height calculation part which sums up respective measurement results measured at the first measurement position and the second measurement position to calculate the tree height.SELECTED DRAWING: Figure 14 【課題】森林において、樹木の樹高を精度良く計測する。【解決手段】森林を構成する樹木の樹高を計測するドローンは、前記樹木に対して、光を発して高さを計測する計測部と、前記樹木の立木方向へ前記ドローンを底面から複数の計測位置に順に移動させる移動部と、前記光による計測範囲に基づき、前記計測範囲で計測できる第１最大高を計算する計算部と、前記計測位置のうち、最も前記底面に近い計測位置である第１計測位置を前記底面から前記第１最大高の半分とする第１計測位置設定部と、前記計測位置のうち、前記第１計測位置を除いた計測位置のいずれかである第２計測位置を前回の計測位置である前回位置に前記第１最大高を加算して求める第２計測位置設定部と、前記第１計測位置、及び、前記第２計測位置で計測された各々の計測結果を合計して前記樹高を計算する樹高計算部とを備えることを特徴とする。【選択図】図１４