Hetta electromagnetic and magnetic airborne geophysical survey data compilation

The Hetta geophysical survey is located in southeast Alaska in the Ketchikan area, about 350 kilometers south of Juneau, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system in May 1992. A total of 1,707 line kilometers were collected covering 323.3 square kilometers. Line spacing was 200 meters (m). Data were collected approximately 30 m above the ground cover or tree canopy from a helicopter-towed sensor platform ("bird") on a 30-m-long line. The large trees and steep terrain resulted in an average ground clearance of 150 m. The Hetta survey was flown for the American Copper & Nickel Company, Inc. and provided to DGGS by the Sealaska Corporation. The data were merged and released with the 1999 Ketchikan geophysical survey maps. Map sheets and some of the other files in this data release contain data from adjacent or nearby surveys. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30433.

Data e Risorse

Campo Valore
access_constraints ["Use Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.", "Access Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below)."]
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bbox-north-lat 55.665447
bbox-south-lat 55.496293
bbox-west-long -132.489647
contact-email dggspubs@alaska.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2020-01-01"}]
frequency-of-update notPlanned
licence ["The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date 2020-04-30
metadata-language eng; USA
metadata_type geospatial
progress completed
resource-type dataset
responsible-party [{"name": "Alaska Division of Geological & Geophysical Surveys", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-132.489647, 55.496293], [-132.240578, 55.496293], [-132.240578, 55.665447], [-132.489647, 55.665447], [-132.489647, 55.496293]]]}
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Gruppi
  • AmeriGEOSS
  • National Provider
  • North America
Tag
  • aeromagnetic
  • aeromagnetic-data
  • aeromagnetic-map
  • aeromagnetic-survey
  • airborne-geophysical-survey
  • amerigeo
  • amerigeoss
  • analytic-signal
  • apparent-resistivity-data
  • apparent-resistivity-map
  • apparent-resistivity-survey
  • beaver-creek
  • billie-mountain
  • bully-boy-creek
  • cholmondeley-sound
  • ckan
  • clarence-strait
  • conductivity-survey
  • copper-harbor
  • copper-mountain
  • corbin-mine
  • cordova-bay
  • deer-bay
  • dell-island
  • dolomi-bay
  • dolomi-mountain
  • eek-lake
  • electromagnetic-data
  • electromagnetic-survey
  • exploration
  • first-vertical-derivative
  • frequency-domain-electromagnetic-data
  • geo
  • geologic
  • geology
  • geophysical-map
  • geophysical-survey
  • geophysics
  • geophysics-search-tag
  • geoss
  • golden-fleece-mine
  • gould-island
  • gould-passage
  • gridded-data
  • halibut-creek
  • hetta-creek
  • hetta-inlet
  • hetta-lake
  • hetta-mountain
  • hydaburg-river
  • james-lake
  • john-creek
  • jumbo-creek
  • jumbo-island
  • ketchikan-mining-district
  • lake-josephine
  • lake-marge
  • lake-mellen
  • lake-williams
  • line-data
  • magnetic-data
  • magnetic-survey
  • magnetics
  • mount-jumbo
  • mud-bay
  • national
  • natzuhini-bay
  • north-america
  • nutkwa-falls
  • paul-lake
  • perry-creek
  • port-johnson
  • portage-bay
  • remote-sensing
  • resistivity
  • resistivity-survey
  • reynolds-creek
  • southeast-alaska
  • sulzer-passage
  • summit-lake
  • united-states
  • wright-creek
isopen False
metadata_created 2025-11-20T02:02:30.062104
metadata_modified 2025-11-20T02:02:30.062108
notes The Hetta geophysical survey is located in southeast Alaska in the Ketchikan area, about 350 kilometers south of Juneau, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system in May 1992. A total of 1,707 line kilometers were collected covering 323.3 square kilometers. Line spacing was 200 meters (m). Data were collected approximately 30 m above the ground cover or tree canopy from a helicopter-towed sensor platform ("bird") on a 30-m-long line. The large trees and steep terrain resulted in an average ground clearance of 150 m. The Hetta survey was flown for the American Copper & Nickel Company, Inc. and provided to DGGS by the Sealaska Corporation. The data were merged and released with the 1999 Ketchikan geophysical survey maps. Map sheets and some of the other files in this data release contain data from adjacent or nearby surveys. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30433.
num_resources 4
num_tags 82
title Hetta electromagnetic and magnetic airborne geophysical survey data compilation