On the quantitative grasp of space features on the natural landscape area by the ready-made environmenal data-base

Abstract

To conserve natural landscape areas, it is important to assess environmental impacts of the construction plan of a big structure on those areas in the early stage. And to assess them easily in the early stage, it is necessary to grasp space features of the constuction point easily.
So the aim of this study is making the simple method to grasp space features on natural landscape areas from the recreational point of view by using the ready-made data base, for example Natural Digital Land Information.
To find adequate indexes to indicate space features, an image test was carried out on 21 case-study points. On the other side index values of same points were culcurated by using the rady-made dada-base. Culcurating values were compared with the result of the image test, and the most conformable indexes to the result were selected as elements of the method.
As the result of this study, “the relative height” as the index of steepness, “the number of landscape resources” as the index of diversity, and “the quantity of roads” as the index of natural condition were selected.