細密DEMの紹介と流域地形計測 Geomorphometry for Detailed Digital Elevation Model

この論文にアクセスする

この論文をさがす

著者

抄録

The purpose of this report is to arrange the definitions of geomorphometric measures for digital ele-vation models (DEMs) and to prescribe some advanced applications of the 50 m-DEM newly deli-vered by the Geographical Survey Institute of Japan.<br> We express terrain surface morphology in the two forms of computer-compatible data structure. One is the vector type, in which the surface is defined as a set of local triangular patches, or contour lines. The other is the raster type as a two-dimensional array of even-spaced terrain heights (DEM). In the report we focus our interest on the geomorphometric measures for DEMs.<br> The measures can be classified into three types by localization of objects: point, window, and drain-age-basin. The window measures are statistical parameters of heights within the scanning window, and they are plotted at central points of the windows resulting in raster maps of geomorphometry.<br> To calculate drainage-basin measures it is necessary to prepare anteriorly the drainage direction matrix (DDM). The DDM is a raster map in which the drainage direction (related to the neighbor-ing lowest point) is indicated by the chain code of the rook's or queen's case. We are not concerned here with the interesting skill of automatic generation of DDM from DEM.<br> The drainage-basin measures are the same as the window measures in definition, but they are plot-ted at outlet points of the basins, and therefore resulted also in raster maps of basin geomorphome-try. <br> Newly defined measures in this report include projected area (<i>A</i>), surface area (<i>A<sub>S</sub></i>), and volume (<i>V</i>) of topography defined within the window and the drainage basin, and their derivatives for ex-ample, general steepness (<i>A</i>/<i>A<sub>S</sub></i>), general relief (<i>V/A</i>), and steepness index (<i>V/A</i><sup>3/2</sup>).

収録刊行物

  • 地理学評論. Ser. A

    地理学評論. Ser. A 68(7), 465-474, 1995-07-01

    公益社団法人 日本地理学会

参考文献:  27件中 1-27件 を表示

被引用文献:  23件中 1-23件 を表示

キーワード

各種コード

  • NII論文ID(NAID)
    10002429552
  • NII書誌ID(NCID)
    AN1016484X
  • 本文言語コード
    JPN
  • 資料種別
    SHO
  • ISSN
    00167444
  • NDL 記事登録ID
    3623797
  • NDL 刊行物分類
    ME11(測地)
  • NDL 雑誌分類
    ZG1(歴史・地理)
  • NDL 請求記号
    Z8-571
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ