Thus we classified the aspect into shady slope, sunny slope, and the rest slopes
(which were called semi-shady and half-sunny slope). In this classification, 0°-67.5° and 292.5°-360° is the shady slope, 112.5°-247.5° is the sunny slope, and the remaining slopes are the semi-shady and half-sunny slope. We assigned the weight 1.1, 0.9, 1 and 1 to the shady slope, the sunny slope, and semi-shady and halfsunny slope respectively.