No change was made in the prevailing technique till 1769, when supervisors had been appointed to monitor the collection of income with the Bengali officers of the former routine. In 1772, the former supervisors had been transformed into collector of income in districts. UAS with thermal cameras may be used https://athletic-performance-supp22211.csublogs.com/39899298/5-essential-elements-for-aerial-photogrammetry-bangladesh