地学雑誌
Online ISSN : 1884-0884
Print ISSN : 0022-135X
寄書
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─
小元 久仁夫田中 邦一松田 重雄横山 薫
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126 巻 (2017) 5 号 p. 653-664

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 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.

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© 2017 公益社団法人 東京地学協会
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