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Hydroacoustic estimates of fish density are used for fisheries management in central Lake Erie. Hydroacoustic data were collected along up to four cross-lake transects in central Lake Erie July 2010 through July 2019. Software-generated raw variables used for calculating estimates of hydroacoustic fish densities are presented here.
Categories: Data;
Tags: Aquatic Biology,
Great Lakes,
Lake Erie,
USGS Science Data Catalog (SDC),
aquatic biology,
Grand Canyon Rio Grande. The Carazones from Chisos Mountains. Brewster County, Texas. 1899.
Drill rig on location approximately six miles northeast of Andrews. Andrews County, Texas. May 1970.
Categories: Image;
Tags: Andrews County, Texas,
Brown, R.L. Collection,
Photographers,
color transparency (slides)
West Hills of Pea Colorado Gap, showing hogbacks of white Helderberg chert. Brewster County, Texas. 1899.
Panorama of Santiago Range, Mount Ord Section. Brewster County, Texas. 1899.
This data release provides digital flight line data for a high-resolution airborne radiometric survey over parts of Montana in the vicinity of the Boulder Batholith. The airborne survey was jointly funded by the Earth Mapping Resources Initiative and Kennecott Exploration Company. The survey was designed to meet complementary needs related to geologic mapping and characterization of mineral resource potential. A total of 34,041 line km of magnetic and radiometric data were acquired over an irregular-shaped area of 6178 km2. Data were collected from a helicopter flown at a nominal terrain clearance of 100 meters (m) above topography along E-W flight lines spaced at 200 m intervals. Tie lines were flown in an N-S...
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: AASG,
Aeroradiometric survey,
Airborne geophysical survey,
Association of State Geologists,
Boulder Mountains,
Limestone Bad Land cliff, Irwin's Canyon, Rio Grande. Texas. 1899.
Periphyton is a complex community of detritus, bacteria, fungi, and algae that grows attached to submerged substrates. Assemblage structure data for algae and cyanobacteria from periphyton samples were collected on a monthly basis from 2017 to 2021. Compiled data were reported as absolute abundance (cells) and biovolume per volume as well as absolute abundance (cells) and biovolume per area at four locations increasing in distance East of the L-67 canal in Water Conservation Area 3 (WCA 3) of the Florida Everglades immediately north of Everglades National Park. The periphyton assemblages were analyzed for five sample types including periphyton plates (Plates), invertebrate inclusion and exclusion plates (Inverts),...
Categories: Data;
Tags: Aquatic Biology,
Ecology,
Everglades National Park,
USGS Science Data Catalog (SDC),
Water Quality,
No caption provided. No date.
Nine Point Mountain from west. Nine Point quadrangle. Brewster County, Texas. 1899.
Sierra Rica opposite Presidio Del Norte. Presidio County, Texas. 1899.
Panorama with image 539. View of large sink hole on rougher trail from Quebradillas to dam site. Aguadilla County, Puerto Rico. January 1922.
These datasets provide early estimates of 2024 fractional cover for exotic annual grass (EAG) species and one native perennial grass species on a weekly basis from April to late June. Typically, the EAG estimates are publicly released within 7-13 days of the latest satellite observation used for that version. Each weekly release contains five fractional cover maps along with their corresponding confidence maps for: 1) a group of 16 species of EAGs, 2) cheatgrass (Bromus tectorum); 3) Field Brome (Bromus arvensis); 4) medusahead (Taeniatherum caput-medusae); and 5) Sandberg bluegrass (Poa secunda). These datasets were generated leveraging field observations from Bureau of Land Management (BLM) Assessment, Inventory,...
Tertiary limestone hills south of Arecibo, seen from road between Arecibo and Ponce; sugar cane in foreground and central (chimney) at left middle ground. Arecibo or Ponce County, Puerto Rico. February 1922.
Drying and crushing plant belonging to Charleston Mining Company (subsidiary of V.C.) at the company's pit shown in images 704 and 705. Charleston County, South Carolina. February 22, 1924.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Charleston County, South Carolina,
Charleston Mining company,
Mills, Mines, Quarries,
photo print
State Geological Survey office building opposite the State Capitol. Nashville, Davidson County, Tennessee. August 21, 1927.
Categories: Image;
Tags: Burchard, E.F. Collection,
Davidson County, Tennessee,
Nashville County, Tennessee,
Photographers,
photo print
Agua Frio Mountain, ten miles west. Brewster County, Texas. 1899.
Panorama with image 540. View of large sink hole on rougher trail from Quebradillas to dam site. Aguadilla County, Puerto Rico. January 1922.
Limestone escarpment above valley of Culebrinas River as seen from road between Lares and San Sebastian. Aguadilla County, Puerto Rico. February 1922.
Vegetation overhanging crack in limestone in upper valley of Guajataca River. Aguadilla County, Puerto Rico. February 1922.
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