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Encoding and Storage of Contour Maps and Their Application to weather Maps

Delfin Y. MONTUNO, Yuuji YOSHIDA, Teruo FUKUMURA

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Summary :

The class of contour map patterns, for example, geographic elevation map and isobar map, is an important class of pictorial data. Its storage and retrieval management have serious implications in the context of a pictorial data bank organization. In this context, we propose the use of the global description of contour map, a string representation called GDCM, for the storage organization of contour maps. We first present a summary of the basic ideas and concepts that leads to the structural description of contour map and then formulate the global description. To take into consideration the frequencies of occurrence of contour clusters (GDCM symbols), we encode the GDCM, which serves as indexes to contour maps, with the Huffman coded GDCM symbols. After organizing the set of encoded GDCM strings into a digital tree for storing the contour maps, we discuss the resulting space and time complexity. We then apply the above ideas to the storage organization of weather maps and evaluate the space and time complexity of the resulting storage structure. The evaluated results indicate that our proposed storage structure for contour map is a viable one.

Publication
IEICE TRANSACTIONS on transactions Vol.E64-E No.5 pp.287-294
Publication Date
1981/05/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Data Processing

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