INDIGENT PRODUCTION OF NON-DISTORTED ISARITHMIC MAPS BY RASTER CONTOURING

The traditional method of using a conventional line-printer to produce rough isolines using raster contouring techniques in indigent environments is reviewed. It is suggested that methods where the isolines are boundaries between different symbols and having no thickness are better, and that numeric (hexadecimal) characters are best used to represent different levels of the dependent variable, especially where the slope of the surface is high. A comprehensive solution is also found to the usual problem with line‑printer maps of distortion due to unequal scales in the two axes of the coordinate system. The contouring procedure is easily adaptable for use by indigent researchers or in indigent environments for all areal phenomena