LAND SURVEY SERVICES BANGLADESH NO FURTHER A MYSTERY

ফেইসবুক পেইজ ভিজিট ও লাইক দিন। মাননীয় উপদেষ্টাDutch mathematician Willebrord Snellius (a.k.a. Snel van Royen) launched the modern systematic use of triangulation. In 1615 he surveyed the gap from Alkmaar to Breda, approximately seventy two miles (116 km). He underestimat