ভূমি মন্ত্রণালয় গণপ্রজাতন্ত্রী বাংলাদেশ সরকার মেনু নির্বাচন করুন A surveyor initially really should know the horizontal length concerning two from the objects, called the baseline. Then the heights, distances and angular placement of other objects could be derived, assuming that They can be visible from one among the initial objects. https://charliecnxgr.boyblogguide.com/29940249/land-survey-professionals-bd-options