基于OLI数据的云南砚山县植被覆盖率遥感估算

The Estimation of Vegetation Coverage of Yanshan County in Yunnan by Remote Sensing Based on OLI Data

选取OLI数据为数据源,通过基于NDVI的像元二分模型法对砚山县植被覆盖进行遥感估算,并对砚山县植被覆盖进行分区,结果表明砚山县的植被覆盖率整体不高,高植被覆盖区1868.79㎞~2,占国土总面积的47.66%,中低植被覆盖区1859.32㎞~2,占48.04%;空间分布上,高植被覆盖区主要分布在东部、东南部,中低植被覆盖区主要分布在中部、西北部,分布均相对集中。

Yanshan County is located in the Midwest of Wenshan, Yunnan Province. It belongs to the Karst zones of Yunnan, Guizhou and Guangxi, which is one of the counties of national poverty alleviation and development in China. The data of OLI was adopted as the data source to estimate and partition the vegetation coverage in Yanshan County by remote sensing technology based on pixel dichotomy model of NDVI. It turned out that the overall vegeta-tion coverage rate was not high. The high vegetation coverage area was 1868. 79 km2, which accounted for 47. 66% of the total area and the low area was 1859. 32 km2 accounting for 48. 04% in total. In the spatial distribution, the high vegetation coverage was mainly distributed in the east and southeast, and the middle and low area were mainly distributed in the middle and northwest. The distribution was relatively concentrated.