航空レーザ計測による植生三次元構造を反映した植生図の作成

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タイトル別名
  • Three Dimensional Vegetation Structure Map Using LIDAR Data
  • コウクウ レーザ ケイソク ニ ヨル ショクセイ 3ジゲン コウゾウ オ ハンエイ シタ ショクセイズ ノ サクセイ

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The authors have produced various types of landscape ecological maps. Basic legend of landscape ecological maps consists of the combination of vegetation classification and landform classification.<BR>The airborne laser survey (LIDAR Survey) is expected for the tool of producing landscape ecological map of forest area. Because, last pulse LIDAR data in winter season is useful for detection of micro landform under forest area, and vegetation classification has been down using three dimensional vegetation structure detected by the difference between LIDAR data in summer and winter seasons. In this paper, the authors introduce the trial produce of three dimensional vegetation structure maps by LIDAR (LIDAR vegetation map) in two different type areas. One is Shinjuku Gyoen Park, where is typical city park in Tokyo Metropolitan area. Another is the south east foot of Mt. Rausu of Shiretoko Peninsula, where is Natural Heritage Area of Japan, Hokkaido Island.<BR> On Shinjuku Gyoen Park, the authors got 1m grid DSM (Digital Surface Model) and DEM (Digital Elevation Model) in summer season and 1m grid DEM in winter season by LIDAR survey. On south east foot of Mt. Rausu, the authors got 0.5m grid DSM and DEM in summer season and 2m grid DSM and DEM in spring or autumn season.<BR> Algorithm of producing LIDAR vegetation maps is as follows. For vegetation classification, the authors used three dimensional vegetation structures such as vegetation height, thickness of crown, and the difference of single layer deciduous forests, double layers deciduous forest and evergreen forest. Using these vegetation structures, it is possible to classify vegetation map with eleven categories legend. In this paper, the authors show 1m grid LIDAR vegetation maps of Shinjuku Gyoen Park and south east foots of Mt. Rausu.<BR> The results of comparison between LIDAR vegetation map and Actual Vegetation Map with 1/25,000 scale by the Ministry of Environment shows that LIDAR vegetation map is corresponding to Actual Vegetation Map. The results of comparison between LIDAR vegetation map and ground troth data shows that LIDAR vegetation map is corresponding to ground truth data in city park, but LIDAR vegetation map is not corresponding to ground truth in natural forest, because of the size difference between crown size of tree and grid side of LIDAR vegetation map.

収録刊行物

  • 地図

    地図 48 (3), 34-46, 2010

    日本地図学会

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