Abstract
This paper describes a new computerized method for compiling, analyzing, and displaying geographic data being used now by the planning staff of the Hudson River Valley Commission. Input data derived from aerial photographic interpretation and from other sources are selected, weighted, and combined to produce maps containing combinations of different land use and environmental quality factors. A geographic system based upon 12 of a square kilometer subdivisions of the UTM grid system is used to reference all data. Data are collected and digitized on an incremental recorder; output is displayed in 10 dark-through-light shadings achieved by overprinting on standard line printers.
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