Method of Drawing a Precise Contour Map with a Terrestrial Laser Scanner: Example of Mapping Travertine Terraces of the Bora Coast, Southeast Miyako Island, Designated a Natural Monument

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  • OMOTO Kunio
    Graduate School of Science and Technology, Nihon University/Department of Geography, College of Humanities and Sciences, Nihon University, ret.
  • TANAKA Kunikazu
    Department of Earth and Environmental Sciences, College of Humanities and Sciences, Nihon University, ret.
  • MATSUDA Shigeo
    Riegl Japan Co.
  • YOKOYAMA Kaoru
    Mie Instrumentation Service Co.

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Other Title
  • 地上型レーザースキャナー（TLS）による精密等高線図の作成方法
  • 地上型レーザースキャナー(TLS)による精密等高線図の作成方法 : 天然記念物・宮古島南東,保良海岸の石灰華段丘を事例として
  • チジョウガタ レーザースキャナー(TLS)ニ ヨル セイミツ トウコウセンズ ノ サクセイ ホウホウ : テンネン キネンブツ ・ ミヤコジマ ナントウ,ホリョウ カイガン ノ セッカイ カ ダンキュウ オ ジレイ ト シテ
  • ─天然記念物・宮古島南東，保良海岸の石灰華段丘を事例として─

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Abstract

<p> The travertine terraces of the Bora coast, at the southeastern part of Miyako Island, Okinawa Prefecture have been designated and notified as a new natural monument by the Ministry of Education, Culture, Sports, Science and Technology and Agency for Cultural Affairs. They are distributed in a small area, ca. 70 m (long) × 30 m (wide), and lie between the low-tide level and 6 m a.s.l. Their diameters are between 10 cm (minimum) and 6 m (maximum), while the relative heights among rimstone pools are between 1 cm and 1 m. The terrestrial laser scanner (TLS) technique is an effective method for drawing precise contour maps and expressing complex small-scale topography. In addition, it is cheaper and less time consuming than producing a map with a total station. To express the characteristics of the travertine terraces, precise contour maps are drawn with 2.5 cm and 20 cm contour intervals using a TLS (VZ-400) and software programs. Information is provided for readers who need to draw a precise contour map successfully with TLS and software programs. The principle and application of the terrestrial laser scanning method are described in the text. Large-scale precise contour maps and photographs of travertine terraces are also presented.</p>

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