Dotted or dashed strains tend to be utilised when the fundamental base map conveys vital (or tough to read through) facts. Broken line types are employed when The situation on the contour line is inferred. Needless to say, to determine variations in elevation amongst two factors, the contour interval, or https://contoursurveyinbangladesh30469.digiblogbox.com/57404814/the-best-side-of-contour-survey