Over two-thirds of all land birds and over half of the migratory species in North America move long distances to areas in Mexico, Central and South America, and the Caribbean islands. For birds crossing the Gulf of Mexico, habitats along the northern coast provide the last possible stopover before autumn migrants make a nonstop flight.
Multispectral (approx. 4-12 bands)
Freshwater algal blooms are estimated to cost the United States economy up to $4.6 billion annually in disruptions to tourism, recreation, drinking water supply, and aquatic food production. Yet knowledge of where and when these blooms occur still often depends on public reporting.
Mercury is a contaminant of concern in the San Francisco Bay and the Sacramento–San Joaquin Delta (Bay-Delta) estuary and watershed.
Cyanobacterial blooms are a global concern because they pose a threat to human and aquatic ecosystem health and cause economic damage. Cyanobacteria can produce toxins potent enough to adversely affect the health of humans, pets, livestock, and wildlife. The USGS is collaborating with the U.S.
In 2020, the USGS released new image data products for monitoring land surface change from 1985 to 2017 across the conterminous United States.
The presence of water in streams can serve as an indicator for potential droughts. The National Hydrography Dataset (NHD) is the most comprehensive dataset of surface waters in the United States and supports a broad range of applications. The streams mapped in the NHD are classified by streamflow permanence into classes of perennial, intermittent, or ephemeral.
Wetlands and surface waters are critically important for both natural and anthropogenic processes including climate regulation, the maintenance of biodiversity, and the provision of ecosystem services important for human well-being. Until recently, mapping the spatial and temporal variability of the Earth’s surface waters and wetlands would have been an impossible task.
Scientists from eight USGS Science Centers completed a multidisciplinary data collection effort during the week of October 21–25, 2019, using new technologies to map and validate bathymetry over a large stretch of the non-tidal Potomac River.
The western United States is increasingly threatened by landscape-level changes such as alterations in precipitation patterns, heightened wildfire incidence and intensity, and increased use of ground and surface water resources by a growing human population. Watershed restoration practitioners seek to address these threats using a variety of techniques such as gabions, check dams, one-rock dams, and cross vanes.
With many years of multi-scale optical system geospatial and radiometric calibration and characterization experience, the EROS Cal/Val Center of Excellence (ECCOE) is a global leader in performing traceable measures of accuracy and assessing data quality to support credible science.