AndreaBozzo/ceres-open-data-index huggingface dataset:
Photogrammetry-derived digital surface model and orthoimagery of Valdez Glacier ice-dammed lake, Valdez, Alaska, October 12, 2016

The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced a digital surface model (DSM) and an orthorectified aerial image over Valdez Glacier ice-dammed lake in support of glacial lake outburst flood hazard assessment and monitoring. Aerial photographs and Global Navigation Satellite System (GNSS) data were collected on October 12, 2016, and were processed using Structure-from-Motion (SfM) photogrammetric techniques to create orthoimagery and a DSM. DSMs represent surface elevations of all surfaces, including vegetation, vegetation-free land, bridges, buildings, and so on. The DSM is a single-band, 32-bit float GeoTIFF file, with a ground sample distance (GSD) of 0.19 m. The "No Data" value is set to -32767. All files can be downloaded free of charge from the DGGS website (http://doi.org/10.14509/30200).

Tags: aerial photography, digital elevation model, digital surface model (dsm), elevation, engineering geology, environmental, flood, geologic, geologic hazards, geological process, geology, geomorphology, glacial, glacial geology, glacial geomorphology, glacial lake, glacial processes, glaciation, glacier flood, glacier outburst flood, glaciers, glaciology, ice, ice dam, lake level, lakes, orthoimagery, photogrammetry, structure from motion, valdez
Organization: State of Alaska
Shoreline change at Alaska coastal communities, Kotlik, Alaska

The Division of Geological & Geophysical Surveys has analyzed long-term shoreline change at 48 Alaska communities. Shoreline datasets were compiled from previously published U.S. Geological Survey assessments and created from historical and recent aerial images by the Alaska Division of Geological & Geophysical Surveys. Shorelines were analyzed to calculate shoreline change rates every 25 meters along coastlines and tidally influenced riverbanks using the Digital Shoreline Analysis System (DSAS; Himmelstoss and others, 2018). The geodatabase for each community includes shoreline positions, the alongshore baseline used to cast transects, and transects that include shoreline change rates and statistics. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30552).

Tags: aerial, aerial photography, alaska, coastal, dggs, emergency preparedness, engineering, environmental, erosion, flood, floodplain, geology, hazards, inundation, kotlik, marine geology, outreach, sea level changes, shelf, shoreface, storm surge, surface, tides, topography, water
Organization: State of Alaska
Tsunami inundation maps of Elfin Cove, Gustavus, and Hoonah, Alaska

In this report, we evaluate potential tsunami hazards for southeastern Alaska communities of Elfin Cove, Gustavus, and Hoonah and numerically model the extent of inundation from tsunami waves generated by tectonic and landslide sources. We perform numerical modeling of historic tsunami events, such as the tsunami triggered by the 1964 Great Alaska Earthquake, and the tsunami waves generated by the recent 2011 Tohoku and 2012 Haida Gwaii earthquakes. Hypothetical tsunami scenarios include variations of the extended 1964 rupture, megathrust earthquakes in the Prince William Sound and Alaska Peninsula regions, and a Cascadia megathrust earthquake. Local underwater landslide events in Taylor Bay and Port Frederick, and a rockslide in Tidal Inlet are also considered as possible tsunamigenic scenarios. Numerical modeling results, combined with historical observations in the region, are intended to provide guidance to local emergency management in tsunami hazard assessment, evacuation planning, and public education for the reduction of future tsunami risk.

Tags: active fault, bartlett cove, coastal, coastal and river, earthquake, earthquake related slope failure, emergency preparedness, engineering, engineering geology, fault displacement, faulting, flood, geologic hazards, geology, hazards, holocene, humpback creek, icy strait, inundation, landslide, modeling, port frederick, raster image, rock avalanche, rockfall, seismic hazards, slides, slope, slope instability, southeast alaska, taylor bay, tidal inlet, tides, topography, tsunami
Organization: State of Alaska
Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Tok area, Tanacross A-5, A-6, and parts of adjacent quadrangles, Alaska

The Tok project area is adjacent to the Delta mineral belt volcanogenic massive-sulfide (VMS) district, the Peak gold-silver-copper skarn, and structurally controlled gold and antimony mineralization in the Stibnite Creek and White Gold areas. The project area also includes the Noah prospect, an intrusion-related copper prospect. Whereas the Delta mineral belt has been extensively mapped and explored, the detailed mapping does not continue into the 2015 Tok project area. In this area, only reconnaissance mapping has been conducted. The combination of a lack of detailed mapping, the industry interest in the adjacent areas, and the geophysical data findings prompted the Alaska Division of Geological & Geophysical Surveys (DGGS) mineral resources group to work in this area. DGGS geologists carried out a geologic reconnaissance mapping project in the Tanacross A-5, A-6, and parts of adjacent quadrangles from June 18 through 28, 2015. This dataset includes two samples with elevated gold, 1.3 and 14.5 ppm, accompanied with very high arsenic values (both over 10,000 ppm) and antimony values (352 and 97.4 ppm). The sample containing 14.5 ppm Au, 305 ppm Bi and 11.1 ppm Te (15ET026) was collected from sulfide pods in schist adjacent to a granitic intrusion near the Noah prospect, and the sample containing 1.3 ppm Au (15KS007) was collected from quartz veining in a fault zone. Major element chemistry has been obtained on the metamorphic rocks to distinguish between igneous and sedimentary protoliths of the rocks using criteria proposed by Dashevsky and others (2003) and on igneous rocks to characterize and differentiate Mesozoic and Cenozoic igneous deposits in the area. The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.

Tags: analyses, analyses and sampling, analytical lab results, analytical results, antimony, arsenic, bedrock geologic map, chemistry, delta mineral belt, geochemical data, geochemical surveys, geochemistry, gold, gold prospect, lab methods, major oxides, massive sulfide deposit, massive sulfide occurrence, massive sulfide prospect, massive sulfides, metallogenesis, metamorphic, metamorphic deposit, metamorphic rocks, metasedimentary rocks, metavolcanic rocks, minor oxides, plutonic hosted, polymetallic vein, porphyry, skarn, tanacross quadrangle, tertiary, tok, trace elements, trace geochemical, triassic, vein deposit, volcanogenic massive sulfide
Organization: State of Alaska
Survey of geology, geologic materials, and geologic hazards in proposed access corridors in selected quadrangles, Alaska

As part of the Department of Natural Resources (DNR) effort to make final recommendations of federal land parcels to be considered for selection by the State of Alaska according to provisions of the Statehood Act, a decision was made to identify and evaluate potential access corridors. Corridor maps were compiled for a total of 78 quadrangles throughout Alaska. This map suite shows relevant geologic information at a scale of 1:250,000 for 10-mile-wide corridors straddling centerlines for proposed access routes throughout Alaska. The maps are based on geologic data compiled from existing, published mapping. Each compiled corridor geology map was used to derive maps of potential construction materials, data quality, and geologic hazards. A second geologic-hazards map shows non-derivative potential hazards compiled from published maps and reports, including faults, icings, avalanches, jokulhlaups, and permafrost.

Tags: alaska, ambler river quadrangle, anchorage quadrangle, aufeis, avalanche, baird mountains quadrangle, barrow quadrangle, barter island quadrangle, beechey point quadrangle, bendeleben quadrangle, bering glacier quadrangle, bethel quadrangle, bettles quadrangle, black river quadrangle, bradfield canal quadrangle, candle quadrangle, chandalar quadrangle, chandler lake quadrangle, charley river quadrangle, chignik quadrangle, circle quadrangle, cold bay quadrangle, construction materials, cordova quadrangle, de long mountains quadrangle, demarcation point quadrangle, dillingham quadrangle, eagle quadrangle, engineering, fairbanks quadrangle, flaxman island quadrangle, geologic materials, geology, glacier outburst flood, harrison bay quadrangle, hazards, healy quadrangle, holy cross quadrangle, howard pass quadrangle, hughes quadrangle, icing, iditarod quadrangle, ikpikpuk river quadrangle, iliamna quadrangle, jokulhlaup, juneau quadrangle, kantishna river quadrangle, karluk quadrangle, kateel river quadrangle, killik river quadrangle, lake clark quadrangle, lime hills quadrangle, livengood quadrangle, lookout ridge quadrangle, mcgrath quadrangle, meade river quadrangle, medfra quadrangle, melozitna quadrangle, misheguk mountain quadrangle, mount katmai quadrangle, mount mckinley quadrangle, mount michelson quadrangle, naknek quadrangle, naled, noatak quadrangle, norton bay quadrangle, nulato quadrangle, ophir quadrangle, permafrost, petersburg quadrangle, philip smith mountains quadrangle, port moller quadrangle, railroad, ruby quadrangle, russian mission quadrangle, sagavanirktok quadrangle, selawik quadrangle, shungnak quadrangle, sleetmute quadrangle, solomon quadrangle, state of, survey pass quadrangle, taku river quadrangle, talkeetna quadrangle, tanana quadrangle, taylor mountains quadrangle, teshekpuk quadrangle, transportation corridor, tyonek quadrangle, ugashik quadrangle, umiat quadrangle, unalakleet quadrangle, utukok river quadrangle, wiseman quadrangle
Organization: State of Alaska
Historically active volcanoes of Alaska

This data lists the historically active volcanoes of Alaska, their location in latitude/longitude decimal degrees, and the year of the last major eruptive event. The 52 volcanoes listed meet at least one of the following criteria since 1700 CE: (1) documented, unquestioned eruption, or (2) a strongly suspected eruption, often an eruption documented in the historical account with very little information (current geologic knowledge must not contradict the eruption account), or (3) persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within ~10°C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly suspected volcanic cause.For the purposes of this dataset a major eruptive event is considered to be one in which juvenile lava erupt as a lava flow or dome or as an explosive column reaching an altitude of several thousand meters above the vent. This data is represented cartographically in Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 133 (Schaefer, J.R., Cameron, C.E., and Nye, C.J., 2009) where the volcano locations are displayed on a grayscale digital shaded relief image of Alaska with a background image of colorized bathymetry.

Tags: active volcanoes, alaska, alaska peninsula, aleutian arc, aleutian islands, historic eruption, state of
Organization: State of Alaska
Valdez Creek electromagnetic and magnetic airborne geophysical survey data compilation

This geophysical survey is located in central Alaska in the Valdez Creek mining district in the south-central Alaska Range. It is about 180 kilometers south of Fairbanks, Alaska and about 250 kilometers northeast of Anchorage, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEM system from August to September 1993. A total of 594 line kilometers were collected covering 210.5 square kilometers. Line spacing was 400 meters (m). Data were collected 30 m above the ground surface from a helicopter towed sensor platform ('bird') on a 30 m long line. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30170.

Tags: aeromagnetic, aeromagnetic data, aeromagnetic map, aeromagnetic survey, airborne geophysical survey, analytic signal, apparent resistivity data, apparent resistivity map, apparent resistivity survey, caribou creek, clearwater mountains, conductivity survey, dry creek, eldorado creek, electromagnetic data, electromagnetic survey, exploration, first vertical derivative, frequency domain electromagnetic data, geologic, geology, geophysical map, geophysical survey, geophysics, geophysics search tag, gridded data, line data, magnetic data, magnetic survey, magnetics, remote sensing, resistivity, resistivity survey, valdez creek mining district, west fork susitna river
Organization: State of Alaska
The ~400 yr B.P. eruption of Half Cone, a post-caldera composite cone within Aniakchak caldera, Alaska Peninsula

DGGS Professional Report 126, The ~400 yr B.P. eruption of Half Cone, a post-caldera composite cone within Aniakchak caldera, Alaska Peninsula, presents an investigation of the ~400 yr B.P. Half Cone eruption. This eruption is the largest post-caldera eruption yet identified from the Aniakchak volcano. Our goals for this study are to (1) describe the dispersal and volume of the ~400 yr B.P. Half Cone eruption based on stratigraphic characteristics of the resulting deposits, (2) evaluate the pre-eruption storage conditions of magmas expelled during the ~400 yr B.P. Half Cone eruption based on both whole-rock geochemical analyses of juvenile material and in situ geochemical analyses of mineral and glass regions of deposits, and (3) synthesize stratigraphic and geochemical observations into a chronology for the ~400 yr B.P. eruption. All files are available from the DGGS website: http://doi.org/10.14509/30839.

Tags: active volcanoes, alaska peninsula, aleutian arc, analyses and sampling, analytical lab results, analytical results, aniakchak river, ash cloud, ashfall, brooks camp, brooks river, cape menshikof, cinder river, coastal, coastal and river, cub creek, dggs, dome, earthquake, ecology, erosion, fan, feldspar, felsic, gas, geobarometry, geochemistry, geologic, geologic hazards, geological process, geology, geomorphology, geothermometry, glacial, glass, groundwater, half cone, hazards, high creek, ice, igneous, interpretation, iron, king salmon river, landslide, lava creek, levees, magnetite, methods, mineralogy, minerals, mountain, mud creek, obsidian, painter creek, petrographic, petrography, petrology, plagioclase, pumice, pyroclastic density current, pyroclastic fall, pyroclastic flow, pyroclastic surge, pyroclastics, rainbow creek, rhyodacite, rocks, surface, surficial, surprise lake, talus, tephra, tephrochronology, till, tuff, vent mountain, volcanic, volcanoes, volcanology, wiggly creek, wind creek
Organization: State of Alaska
Geologic Map of the Eastern Half of the McGrath Quadrangle, Alaska

This map is a compilation of previously unpublished and published data, as well as from updated field mapping. This publication offers a 1:125,000-scale map sheet accompanied by a booklet containing a summary of the geology, a colored terrane map, map unit descriptions, a summary table listing selected mineral deposits and energy resources, references, and a correlation of map units. The text (in the report) describes the geology and resource potential of a highly mineralized region centered in the Farewell silver-lead-zinc district southeast of McGrath. Potentially important coal resources flanking the Alaska Range are also described in the map area.

Tags: alaska, alluvial deposits, cambrian, carboniferous, cenozoic, colluvial deposits, cretaceous, denali-farewell fault, devonian, dillinger terrane, early devonian, early jurassic, early silurian, eolian, farewell terrane, geologic hazards, geologic materials, geology, glacial deposits, jurassic, kahiltna terrane, late devonian, late permian, late silurian, mcgrath, mckinley terrane, mesozoic, middle devonian, middle fork plutonic complex, mystic terrane, ordovician, paleozoic, permian, pingston terrane, post river pluton, proterozoic, quaternary, silurian, state of, tertiary, triassic, veleska lake volcanic complex, yukon-tanana terrane
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Talkeetna Mountains Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. Lake polygons represent areas of water bodies (excluding streams and rivers) > 150 square meteres, present at the time of lidar data collection.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar lake polygons, proposed natural gas pipeline, remote sensing, shaded relief, state of, talkeetna mountains quadrangle, topographic map, trans-alaska pipeline
Organization: State of Alaska
Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment G: Nunam Iqua to Chevak

Aerial photographs of the coastline from Nunam Iqua to Chevak were collected on September 1, 2015. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. This file is a single-band, 32-bit float DSM (digital surface model) which represents surface elevations of buildings, vegetation, and uncovered ground surfaces in meters with 20 cm GSD. The No Data value is set to -32767. The file employs LZW compression.

Tags: chevak, coastal, coastal and river, engineering, engineering geology, environmental, geologic hazards, geology, geomorphology, hazards, marine geology, methods, nunam iqua, raster image, surficial
Organization: State of Alaska
Digital elevation model of Sitka Harbor and the city of Sitka, Alaska: Procedures, data sources, and quality assessment

The 0.53-second Sitka Alaska Digital Elevation Model provides bathymetric and topographic data in ASCII raster format of 0.53-second resolution in geographic coordinates.

Tags: alaska, baranof island, bathymetry, city and borough of sitka, digital elevation model, japonski island, raster image, sitka, sitka sound, southeast alaska, state of, topography, tsunami
Organization: State of Alaska
High-resolution lidar data for Kotlik, Western Alaska

The Alaska Division of Geological & Geophysical Surveys (DGGS) used aerial lidar to produce a digital terrain model (DTM), surface model (DSM), and intensity model for the area surrounding the community of Kotlik, Alaska. Detailed bare earth elevation data for the Kotlik area support and inform potential infrastructure development and provide critical information required to assess geomorphic activity. Airborne data were collected on August 17, 2019, and subsequently processed in Terrasolid and ArcGIS. Ground control was collected between August 20-22, 2019, by the Alaska Division of Mining, Land, and Water. This data collection is released as a Raw Data File with an open end-user license. All files can be downloaded free of charge from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/30561).

Tags: apoon, apoon pass, chaniliut, digital elevation model, digital surface model (dsm), digital terrain model, engineering, engineering geology, geologic, geology, geomorphology, geotechnical, kaelhuk pass, kotlik, kotlik river, kvichvauk pass, lidar, lidar intensity image, lidar las file format, little kotlik river, nelutahalik creek, norton sound, pastol bay, pastoliak river, pastolik river, point cloud data, remote sensing, surficial, surficial geology, tatlalinguk pass, topography, web service
Organization: State of Alaska
Geologic Map of the Anchorage C-8 NW Quadrangle, Alaska

This map is one of a series of four 1:25,000-scale quadrangle maps (Anchorage C-8 NW Quadrangle) intended to provide information on the geology and construction materials along the southern margin of the Talkeetna Mountains between Little Susitna River and Nancy Lake, Alaska. Additionally, the geologic map portrays faults, if present, as well as other lineaments that represent either faults or erosional features.

Tags: alaska, anchorage quadrangle, arkose ridge formation, castle mountain, castle mountain fault, construction materials, early jurassic, geology, holocene, late cretaceous, mesozoic, pleistocene, quaternary, southcentral alaska, state of, tertiary, tyonek formation
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Livengood Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. Hillshade (shaded relief) images, produced from bare-earth DEMs provide a visual representation of topographic relief.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, hillshade image, lidar, livengood quadrangle, proposed natural gas pipeline, remote sensing, shaded relief, state of, topographic map, trans-alaska pipeline
Organization: State of Alaska