Orthomosaic maps of the Clackamas River, Oregon, produced from images acquired April 16-18, 2024

A Cessna 182 fixed-wing aircraft equipped with a multispectral camera was used to collect aerial imagery of selected river reaches within the Willamette River Integrated Water Science basin in Oregon. On April 16-18, 2024, image acquisition was focused on four reaches of the Clackamas River. Photogrammetry techniques were applied to the images consisting of visible or red, green, and blue (RGB) spectral bands, a near-infrared (NIR) spectral band, and a long-wave infrared (LWIR) spectral band to produce orthomosaic maps of each study reach along the Clackamas River. The resulting orthomosaic maps are provided as cloud optimized GeoTIFF files. The spatial resolution, pixel size, of the visible (RGB) and the color infrared (abbreviated CIR and including NIR, red, and green bands), orthomosaic maps is 0.09 meters for all study reaches. The pixel size of the long-wave infrared (LWIR) orthomosaic maps varied between 0.54 and 0.61 meters among the four study reaches. The long-wave infrared camera was not calibrated for absolute temperature so the raster values of these images are expressed as digital counts.