地形解析に基づく地形設計に関する研究

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When design a huge buildings complex like an university campus on hill areas preserving natural-scape, it is essential to get the information of the topographic structure of the site as well as its geographic characteristics. Using a computer graphics, a system has been developed which enables the planners to proceed the topographic analysis and the landform designing as a continuous work. The contour lines of an ordinary map of 1/2500 scale are inputted by a digitizer to make a digital map. The contour data are transformed to the altitude data of 10 meters meshes. Using this altitude data, the data of gradient, inclination direction, drainage pattern and area of each mesh are calculated. The results are presented graphically on a CRT display. In addition, the rate of ups and downs of the site is measured to grasp topographical structure. The laplacian is calculated on each mesh and the undulations are measured by the variance of altitude of an unit area comprising 97 meshes (about 1 hectare). Overlaying these two data, the part of area with gentle rise and fall is extracted for the building site. For the design of landform, a computerized system is developed which, given an objective variance of altitude, generates a site of gentle slope automatically. It smoothes a hilly land to a gentle one by repeating the local leveling until the altitude variances of all meshes come under the objective value. The local leveling in every step is con-ducted by finding the unit area that has the largest value of variance in the site and then, by giving the mean value of the altitude to all meshes of the unit area, which assures the balance of cut and fill.
社団法人日本建築学会の論文
1988-11-30

地形解析に基づく地形設計に関する研究

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