Skip to main content

Orthomosaic images of the middle and lower Elwha River, Washington, 2012 to 2017


Publication Date
Start Date
End Date


Ritchie, A.C., Curran, C.A., Magirl, C.S., Bountry, J.A., Hilldale, R.C., Randle, T.J., and Duda, J.J., 2018, Data in support of 5-year sediment budget and morphodynamic analysis of Elwha River following dam removals: U.S. Geological Survey data release,


This dataset presents 28 georeferenced orthomosaic images of the middle and lower reaches of the Elwha River. Each mosaic image was created by stitching together thousands of individual photographs that were matched based on numerous unique tie points shared by the photographs. The individual photographs were taken by a plane-mounted camera during multiple flights over the study area spanning 2012 to 2017. Because each mosaic is orthogonal to the earth's surface and is georeferenced to real-world coordinates, changes to the river channel and surrounding morphology can be seen and measured, including channel width, river braiding, bar formation, and other metrics to assess responses of the river to the removal of two large dams upstream [...]


Attached Files

Click on title to download individual files attached to this item.

“Low-resolution sample orthomosaic.”
thumbnail 10.66 MB

“Orthomosaic images of the middle and lower Elwha River.”
2.24 GB


Data were obtained to assess the morphodynamic and sediment budget responses following the removal of two dams in the Elwha River. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to identify visible features. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Item Actions

View Item as ...

Save Item as ...

View Item...