Abstract
Afortran iv computer program for grey-level mapping of spatial data using a CDC 6600 is described. The program produces maps for irregularly distributed data in as many as 10 intensity levels which are displayed in grey tones by a lineprinter. Unlimited map size and unrestricted data input provide for as many as 5000 data points per 13-in.-wide strip of map. The program is easily modified for other installations. Examples are given of geochemical analyses of stream sediments in Northern Ireland.
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References
Howarth, R. J., and Lim, A. L., 1969, An approach to program documentation: Computer Bull. 13, p. 291–295.
Stucki, P., 1969, Generation of grey tones by computer for simulation of visual information systems: IEEE Trans, Computer C-18, p. 642–643.
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Howarth, R.J. Fortran IV program for grey-level mapping of spatial data. Mathematical Geology 3, 95–121 (1971). https://doi.org/10.1007/BF02045955
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DOI: https://doi.org/10.1007/BF02045955