Reclamation Information Sharing Environment (RISE)

Black and white aerial photos of the Missouri and Musselshell rivers collected August 18 1977, September 25 1977, and October 11&12 1977 at a scale of 1/84,000 These individual aerial photographs have been processed into a mosaic using Agisoft's Metashape photogrammetry software. The processing included fiducial mark placement, alignment, bundle adjustment, and error reduction. The mosaic was then geo-referenced in ArcPro using a spline transformation to ensure the finest referencing. The purpose/scope of the imagery data is to determine, by visual interpretation; large-scale vegetation patterns and physical formation of delta-backwater landforms. QAQC of this dataset included an internal visual inspection of the imagery for geometric anomalies during the alignment and spot checks of georeferencing by comparing landmarks and other features to imagery datasets in the area. The quality of the georeferencing is considered a use limitation due to the natural relief in the study area and changes to the landscape since 1977. The accuracy of feature locations will begin to decline in locations away from the river channel. The margin of error in geo-referencing is +/- 40 feet.