Research on Monitoring of Urban Vegetation Coverage Based on Remote Sensing Images
The growth state and distribution density of urban vegetation have an important impact on urban ecological environment.Based on the newly opened Landsat 9 satellite image data in recent years,this paper analyzes and studies the satellite composition and image characteristics,conductes radiometric calibration and atmospheric correction on it,and then uses Normalized Vegetation Index(NDVI)to invert the urban vegetation coverage rate.The results showed that the vegetation coverage rate in the study area is relatively high,with an average of 60.17%;generally,there are high vegetation coverage rate areas and relatively high vegetation coverage rate areas,and there are relatively few low vegetation coverage rate areas and relatively low vegetation coverage rate areas;according to the spatial distribution,the average vegetation coverage rates in Pukou District,Jiangning District and Lishui District are above 60%,while in other areas they are below 60%.In general,the vegetation ecological situation in the study area is good,and the vegetation coverage rates are high.Meanwhile,the urban vegetation coverage rate can be retrieved more accurately by using Landsat 9 satellite image data,which provides reliable data support for urban ecological environmental protection and supervision.
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