Geoinformatics
Online ISSN : 1347-541X
Print ISSN : 0388-502X
ISSN-L : 0388-502X
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Volume 2, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • Application of the Production System to Contour Mapping*
    Hideo KASAI
    1991 Volume 2 Issue 1 Pages 1-7
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_1
    JOURNAL FREE ACCESS
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    A production system is applied to contour mapping. The contour map is constructed by the interpolation of the irregularly distributed data, and each contour line of the map is traced clockwise.
    In this paper, the production system which consists of the production rule, the induction engine, and module group is presented. The production rule is subdivided into three parts; the rule number, the conditional clause, and the result clause. The conditional clause consists of the conditional proposition and the truth value, and the result clause consists of the result proposition only. The truth value takes the logical symbol either“TRUE”or“FALSE”. The proposition is defined in the form of modular structure. The rule number acts as the module number also.
    If the logical value of the conditional clause is “TRUE”, then the result proposition and the rule number in the same rule are selected. Then, to find following rule, the result proposition turn to the conditional proposition, and the module of which number coincides with the rule number executed. The modules in the production system are related with each other by the production rule.
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  • Logical Structure of the Principle of Superposition from a Viewpoint of Geology-Oriented Logical System
    Kiyoji SHIONO, Kiyoshi WADATSUMI
    1991 Volume 2 Issue 1 Pages 9-22
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_9
    JOURNAL FREE ACCESS
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    We studied a logical structure of the Principle of Superposition as a fundamental model of the Geology-Oriented Logical System. Introducing a function f from a subset A of the real space R3 into set B of strata recognized inA, we defined exactly binary relations K, C andL on set B; aKb: stratum a is older than stratum b, aCb: stratum a is directly under stratum b, and aLb: stratum a is under stratum b. Using these symbols, the Principle of Superposition is formalized as follows:
    L∪L-1=O⇒ C⊂K and L∪L-1=O⇒L⊂K.
    It is hopeful that this type of formalization makes clear the logical structure in geology and leads us to a deep understanding of our geological knowledge as well as a development of effective algorithmsfor comptuter processing of geological information.
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  • Softwares for Digital Image Processing: (3) Cluster Labeling and Perimeter Extraction
    Tsukasa NAKANO, Naoyuki FUJII
    1991 Volume 2 Issue 1 Pages 23-44
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_23
    JOURNAL FREE ACCESS
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    Softwares of our image processing system are explained.‘exgrain’is a program available for labeling all grains in the binary digital image in order of their size. All perimeter of the grains can be extracted by‘exedge’. Since data structure of the perimeter is rather complex, we present the data converters which are useful when the data is analyzed.
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  • Softwares for Digital Image Processing: (4) Network Extractor
    Tsukasa NAKANO, Naoyuki FUJII
    1991 Volume 2 Issue 1 Pages 45-64
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_45
    JOURNAL FREE ACCESS
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    We describe the algorithms to analyze the flow through the network structure on the digital image. In this paper, an algorithm to tessellate the network area on the image data into triangles is explained. This algorithm is based on the Voronoi tessellation and available for constructing the skeleton of the network area without discarding its geometrical information. We also explain a program, tc2, as an example of the realization of the algorithm.
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  • Automatic Observation System of Electrical Prospecting and Its Data Processing
    Makoto INOUE, Masaaki OHTEKI, Akira IWAMATSU, Shuichiro YOKOTA
    1991 Volume 2 Issue 1 Pages 65-83
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_65
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    An automatic observation system of electrical prospecting with the function of safety guard against electrical shocks was made. Two programs (HITEIKOU. BAS and DEPTH2.BAS) are prepared for use this system effectively. One is the real time processing of data to draw contour maps of apparent resistivities and their changing rate. The other is the time series processing of long period data.
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  • [title in Japanese]
    1991 Volume 2 Issue 1 Pages 85-88
    Published: March 25, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.6010/geoinformatics1990.2.1_85
    JOURNAL FREE ACCESS
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