A Study on Construction of Enhanced Vegetation Cover Map considering Vegetation Cover Ratio in a Pixel by Remote Sensing Data

摘要

[ABSTRACT] In order to evaluate the urban environment, the vegetation information is very important. This information should be constructed as the expression of real vegetation, not as that of scale or usage, and also updated to accommodate the change of vegetation. The vegetation cover ratio in a pixel using the remote sensing data simulated by airborne MSS data with high resolution was examined. In this examination a correct vegetation coverage is needed to establish assumption algorithm of vegetation cover ratio in a pixel. This map was constructed by airborne MSS data of high resolution and airborne photograph, which is verified by field investigation. The remote sensing data of low resolution was simulated by high resolution airborne data. The vegetation cover ratio in a pixel is defined as the ratio of correct vegetation in one pixel of simulated data. On the view point of mixel, the relationship between the vegetation cover ratio in a pixel and the mean NVI (normalized vegetation index) was investigated. This investigation was seen that the relationship between the vegetation cover ratio in a pixel and the mean NVI was linear. On the basis of this relationship, the vegetation cover ratio in a pixel can be assumed by NVI of remote sensing data.