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- IDA Yoshiaki
- Earthquake Research Institute, University of Tokyo
Bibliographic Information
- Other Title
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- 等高線データの数値処理
- トウコウセン データ ノ スウチ ショリ
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Description
Graphic data are transferred to the video-frame memory by a TV camera, and curves are automatically traced to create digital curve data that consist of successive grid points of the video-frame memory with high grey levels corresponding to dark points. The curve data are first fit to a line every small segment, and then approximated by a smooth connection of circular arcs. Contours on a map are processed in this way, and the altitude at an arbitrary point is evaluated by an interpolation. Namely a curve that passes this point and intersects perpendicularly to neighbouring contours is introduced, and the contour values are interpolated, based on the distances to the contours along the curve.
Journal
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- Zisin (Journal of the Seismological Society of Japan. 2nd ser.)
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Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 38 (3), 351-358, 1985
SEISMOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204304925312
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- NII Article ID
- 40001526333
- 130006786741
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- NII Book ID
- AN00305741
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- ISSN
- 18839029
- 2186599X
- 00371114
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- NDL BIB ID
- 3052603
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed