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Dolomi Geophysical Survey

The Dolomi 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 March 1991. A total of 415 line kilometers were collected covering 81.2 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 Dolomi survey was flown for the American Copper & Nickel Company, Inc. and provided to DGGS by provided 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.

Available Data Metadata Overview
File Name Data File Format File Size Info
Download gpr2020_006_dolomi_1991_vector_data Vector data 51.2 M Read me
Download gpr2020_006_dolomi_1991_maps_prn_format Plot files 75.8 M Read me
Download gpr2020_006_dolomi_1991_databases_geosoft Linedata Geosoft format database 8.4 M Read me
Download gpr2020_006_dolomi_1991_images_registered Image files 635.2 K Read me
Download gpr2020_006_dolomi_1991_grids_geosoft Gridded data Geosoft format 1.1 M Read me
Download gpr2020_006_dolomi_1991_grids_ermapper Gridded data ER Mapper 1.0 M Read me
Download gpr2020_006_dolomi_1991_kmz Google Earth files 4.1 M Read me
Download gpr2020_006_dolomi_1991_documents Adobe PDF files 1.4 M Read me
Download gpr2020_006_dolomi_1991_maps_pdf_format Adobe PDF files 123.2 M Read me
Download gpr2020_006_dolomi_1991_profiles_stacked Adobe PDF files 22.6 M Read me
Download gpr2020_006_dolomi_1991_ascii_data ASCII tabular files 9.2 M Read me


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