Compass - Dataset details

Description: This portion of the USGS data release presents digital elevation models (DEMs) derived from bathymetric and topographic surveys conducted on the Elwha River delta in July 2017 (USGS Field Activity Number 2017-638-FA). Nearshore bathymetry data were collected using two personal watercraft (PWCs) and a kayak equipped with single-beam echosounders and survey-grade global navigation satellite systems (GNSS) receivers. Topographic data were collected on foot with survey-grade GNSS receivers mounted on backpacks. Two separate DEMs were constructed. A DEM was produced that covered the entire survey area (approximately 511 ha) with 5-m horizontal resolution. A second DEM with 1-m resolution was produced that covered the river mouth and adjacent areas (approximately 131 ha). Digital data files for each DEM are provided in ESRI ARC ASCII (*.asc) format.

Data Location: https://www.sciencebase.gov/catalog/file/get/5c9bf7bae4b0b8a7f62c32cb/?name=ew17_feb_dem_1m.asc
https://www.sciencebase.gov/catalog/item/5c9bf7bae4b0b8a7f62c32cb
https://doi.org/10.5066/P9AJ8ALB
https://www.sciencebase.gov/catalog/file/get/5c9bf7bae4b0b8a7f62c32cb/?name=ew17_july_dem_5m.asc
https://www.sciencebase.gov/catalog/item/5c9bf7bae4b0b8a7f62c32cb
https://doi.org/10.5066/P9AJ8ALB
https://www.sciencebase.gov/catalog/file/get/5c9bf7bae4b0b8a7f62c32cb/?name=ew17_feb_dem_1m.png
https://www.sciencebase.gov/catalog/item/5c9bf7bae4b0b8a7f62c32cb
https://doi.org/10.5066/P9AJ8ALB
https://www.sciencebase.gov/catalog/file/get/5c9bf7bae4b0b8a7f62c32cb/?name=ew17_july_dem_5m.png
https://www.sciencebase.gov/catalog/item/5c9bf7bae4b0b8a7f62c32cb
https://doi.org/10.5066/P9AJ8ALB

Data Information for field activity 2017-638-FA