Abstract
West Virginia's 62 minable coal seams exhibit diverse quality, providing the coal user with a choice of grades to meet specifications for various applications. The West Virginia Geological and Economic Survey maintains a growing computer data base of quality information on these coals. They used the data base to develop computer-generated regional coal quality maps (scale, 1:500,000). Geostatistical analysis of coal quality data using semi-varigrams and kriging helps us determine whether sufficient geographic control is available for mapping. The data base has been used to search for samples meeting specifications provided by potential customers for West Virginia coal. These specifications are either analytical parameters in the data base or parameters that can be calculated from the data base. The result is a listing of samples, with areas and seams that meet the specifications. Target-point maps can be computer-generated, showing the locations of samples meeting specifications.
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