Drawing of Density Diagram by Mellis Method in Stereographic Projection on a Personal Computer

• HAYASHI Takehiro

  Earth Science Laboratory, Faculty of School Education, Hiroshima University

Bibliographic Information

Other Title

• Mellis法によるステレオ投影密度分布図の描画
• システム・ソフトウェア開発 Mellis法によるステレオ投影密度分布図の作成
• システム ソフトウェア カイハツ Mellisホウ ニヨル ステレオ トウエイ

Abstract

Drawing method of the density diagram by Mellis method in the stereographic projection on a personal computer is proposed with a sample program in BASIC. In Mellis method, the density is shown by overlapping of 1% small circles drawn round all plotted points. In the proposed method, the small circle is painted through stippling of all dots within the small circle on a computer graphic screen. When the circle partly or fully overlaps another circles, those overlapping areas are changed to another colors. As colors are set for overlapping numbers from 1 up to 14, each color area in the drawn diagram just shows the density. Then, these color areas are arranged and changed into 5 different color areas to each other, and these 5 color areas replaced into different non-colored patterns to each other, which can be printed with monochromatic type printer through operation of hard copy of the computer screen.

Journal

• Geoinformatics

  Geoinformatics 7 (3), 199-207, 1996

  Japan Society of Geoinformatics

Keywords

• Stereographic projection
• Mellis method
• Density diagram
• BASIC program

Details

• CRID: 1390001204439451008
• NII Article ID: 10004560400
• NII Book ID: AN0036643X
• DOI: 10.6010/geoinformatics1990.7.3_199
• ISSN: 1347541X
• ISSN: 0388502X
• NDL BIB ID: 4045813
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4045813
• Web Site: https://www.jstage.jst.go.jp/article/geoinformatics1990/7/3/7_3_199/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed