Evaluation of Calibration Method for Field Application of UAV-Based Soil Water Content Prediction Equation

Figure 7

Change of coefficient of determination between the water content and RGB values according to the altitude. Water content range: (a) 1.1∼30.8%; (b) 18.4∼24.2%; (c) 24.2∼30.8%.

(a)

(b)

(c)