A contour maps includes contour strains which can be imaginary lines connecting points of equal elevation. This sort of strains are drawn over the approach of a place following developing lowered amounts of a number of factors in the region. আমরা সারা বাংলাদেশে আমাদের সার্ভিস প্রদান করে থাকি। · ডিজিটাল https://riverhosuz.onesmablog.com/5-essential-elements-for-contour-survey-in-bangladesh-72997353