Wang et al. [89] proposed a completely new strategy for monitoring ice velocity in rivers making use of UAVs and machine vision technology. The strategy consists of applying UAVs to seize higher-resolution orthoimages through ice flood periods, extracting attribute factors in drift ice visuals with the size-invariant characteristic change algorithm https://gavinxsdm677blog.blogocial.com/new-step-by-step-map-for-topographic-survey-drone-bangladesh-66578129