I was interested in techniques for producing maps, and found the article by William D. Johnston in the May and June 1979 Byte Magazine. This two part article provided an excellent introduction and source code in Basic language. His code was restricted to the algorithms and did not get involved with user interface. To evaluate his algorithms and try out the displays I coded the program and a simple interface in Borland C The program in its current form is highly based on Mr Johnston's algorithms and provides no significant additional capabilities
