বাংলাদেশ জরিপ অধিদপ্তর মেনু নির্বাচন করুন Gross problems or blunders: Mistakes created by the surveyor during the survey. Upsetting the instrument, misaiming a focus on, or writing down a Erroneous measurement are all gross errors. Surveyors prevent these faults by calibrating their machines, working with consistent strategies, and by https://topographic-land-survey-b03468.creacionblog.com/29505716/land-surveying-services-bangladesh-no-further-a-mystery