“An extensible approach to imagery of gridded data” by Dutton

  • ©Geoffrey Dutton




    An extensible approach to imagery of gridded data



    A program offering a variety of cartographic techniques for mapping gridded data is described. Dot-distribution maps, several forms of contour maps and screen-toned maps are currently implemented for plotter and vector CRT. The structure and logic of the program is discussed and illustrated. The approach requires only local access to a data grid in a paging environment, allowing large data sets to be manipulated. Maps output may be plotted at any scale, irrespective of the size of the plotting device. Additional graphic techniques and output devices are readily accommodated, and will become even more so when full virtual memory is implemented. Possibilities for image overlay are discussed and illustrated, and plans for data overlay are outlined.


    1. Calcomp (California Computer Products, Inc.). General Purpose Contouring Program. Company Publication, Anaheim, California (1968).
    2. Chrisman, N. and White, D. Programming for Transportability: A Guide to Machine Independent Fortran. Laboratory for Computer Graphics and Spatial Analysis, Harvard University (1977), 40 pp.
    3. Coulthard, W. J. Contouring a Grid: Program Description UBC CNTOUR). Computing Centre, U. of British Columbia, Vancouver, B. C., Canada (1969).
    4. Dayhoff, M. O. A Contour-map Program for X-ray Crystallography. Communications, Association for Computing Machinery, Vol. 6, (1968).
    5. Dutton, G. DOT.MAP User’s Guide. Laboratory for Computer Graphics and Spatial Analysis, Harvard University, Cambridge, Mass. (1977), 40 pp.
    6. Morrison, J. L. Changing Philosophical-Technical Aspects of Thematic Cartography. The American Cartographer, Vol. 1, No. 1 (1974), pp.
    7. Muehrcke, P. Thematic Cartography. Commission on College Geography, Resource Paper No. 19, Association of American Geographers (1972), 66 PP.
    8. Murray, F. W. A Method of Objective Contour Construction. The Rand Corporation-, Santa Monica, California (1968).
    9. Oberlander, T. M. A Critical Appraisal of the Inclined Contour Technique of Surface Representation. Annals, American Association of Geographers, Vol. 58, (1968), pp. 802-813.
    10. Peucker, T. K. and Chrisman, N. Cartographic Data Structures. The American Cartographer, Vol. 2, No. 1 (1975), pp. 55-69.
    11. Peucker, T. K., Tichenor, M. and Rase, W. The Computer Version of Three Relief Surfaces. Display and Analysis of Spatial Data. NATO Advanced Study Institute, John Wiley, New York (1975), pp. 187-197.
    12. Robinson, A. H. and Thrower, N. J. W. A New Method for Terrain Representation. Geographical Review, Vol. 47 (1957), pp. 507-520.
    13. Robinson, A. H. and Thrower, N. J. W. On Surface Representation Using Traces of Parallel Inclined Planes. Annals, American Association of Geographers, Vol. 59 (1969), pp. 600-603.
    14. Rosenfeld, A. Picture Processing by Computer. Academic Press, New York 1969).
    15. Tobler, W. R. Data Display and Presentation. Index paper in environmental information systems, R. F. Tomlinson, (ed.), IGU/COGDSP Publication, University of Saskatchewan Press, Saskatoon, Canada (1970).
    16. Tomlinson, R. F. (ed.). Geographical Data Handling. International Geographical Union Second Symposium on Geographical Information Systems, Ottawa, Canada (1972), Vol. 2, Ch. 11.

ACM Digital Library Publication:

Overview Page: