Spatial Differentiation Analysis of Water Quality in Dianchi Lake Based on GF-5 NDVI Characteristic Optimization

Table 7

The proportion of NDVI threshold in the study area.

NDVI value	−1 ≤ NDVI < 0 (%)	0 ≤ NDVI < 1 (%)	NDVI = 1 (%)
Caohai	8.922	90.425	0.653
Waihai	99.277	0.722	0.001