Education and demonstration – Geography – Map or terrain model
Patent
1994-05-03
1995-08-29
Hafer, Robert A.
Education and demonstration
Geography
Map or terrain model
434150, 293 34, G09B 2910
Patent
active
054455243
ABSTRACT:
A geographical region is circumscribed by a rectangular parallelogram and identified by a letter or numeral prefix. The parallelogram is divided by an equal number of rows and columns into a series of smaller rectangles circumscribing a section of the geographical region and each is assigned a different whole number representing its position relative to the others. Each section is identified by the prefix and its whole number. Each smaller rectangle is divided by the same number of rows and columns into a second series of smaller rectangles circumscribing a subsection of the previous section and each is assigned a different whole number representing its relative location, and each is identified by the prefix and the whole number assigned to the previous section followed by the whole number assigned to the subsection. The steps are repeated to define successively smaller rectangles circumscribing successively smaller subsections of the previous subsection and a whole number is assigned to each successively smaller subsection representing its relative location, and each series of rectangles is identified by the prefix followed by the sequence of whole numbers. Each whole number identifies a particular section of the geographical region and the value of each whole number identifies the location of each section or subsection relative to the others. The order of each whole number in the sequence corresponds to the size of the section identified by the whole number. The first whole number being the largest section and the following whole numbers being sequentially smaller sections.
REFERENCES:
patent: 4402672 (1983-09-01), Lowe, Jr.
patent: 5030117 (1991-07-01), Delorme
Rand McNally's Streetfinder map New Update Edition, 1994.
Hafer Robert A.
O'Neill Michael
Roddy Kenneth A.
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