আমরা নির্ধারিত সময়ের মধ্যে অফিসের কাজ শেষ করে চূড়ান্ত রিপোর্ট জমা দেই। Certainly, to find out differences in elevation involving two factors, the contour interval, or distance in altitude concerning two adjacent contour strains, has to be regarded, and this is Commonly said inside the map key. Generally contour intervals https://franciscoktzei.thekatyblog.com/31137213/contour-survey-fundamentals-explained