 This paper presents a novel approach for creating accurate digital terrain models, DTMs, of river channels and their floodplains. It combines mobile laser scanning and low altitude unmanned aerial vehicle, UAV, photography-based methods to generate both a digital bath metric model of the inundated river channel and a DTM of a point bar of a meandering subarctic river. The authors then evaluate the accuracy of the resulting data by comparing it to terrestrial laser scanning and combining it with an optical bath metric model. This combination enables them to create a seamless DTM of two different measurement periods, allowing for a change detection of the meander bend over a one-year period. This article was authored by Claude Flynner, Maddy Vaja, Antoni Giacola and others.