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Simulating forest pictures by impact printersAuthor(s): Elliot L. Amidon; E. Joyce Dye
Source: General Technical Report PSW-025. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 11 p.
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (568 KB)
DescriptionTwo mechanical devices that are mainly used to print computer output in text form can simulate pictures of terrain and forests. The line printer, which is available for batch processing at many computer installations, can approximate halftones by using overstruck characters to produce successively larger "dots." The printer/plotter, which is normally used as an interactive terminal, permits fine adjustment of the space between characters in the plot mode. This control over blank space improves tonal appearance and permits solid black. The two types of printers have complementary uses. The line printer is best for high volumes of data, while the slower printer/plotter offers a greater range of densities.
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CitationAmidon, Elliot L.; Dye, E. Joyce. 1978. Simulating forest pictures by impact printers. General Technical Report PSW-025. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 11 p.
KeywordsMapping systems, computer simulation, pattern recognition, impact printers, grey scale
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