BTTB & Mobile Companies: Topographical maps and DEM is going to be practical for planning of installation for radio relay stations all through the nation. Topographical maps is often successfully employed for tower places and willpower of protection zone. ভূমি রেকর্ড ও জরিপ অধিদপ্তরের নিয়োগবিধি - ১৯৮৪ With regards https://bertiem319env6.wannawiki.com/user