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During June, 1997, a helicopter geophysical survey was carried out over part of Nordmarka, an area immediately northwest from Oslo. The purpose of the survey was to provide geophysical information to improve geological mapping in the area. Approximately 3260 line-kilometers of VLF, radiometric, magnetometric, and electromagnetic data were acquired, covering an area of approximately 650 sq km, mostly over the area covered by NGUs Oppkuven mapsheet.
NGU conducted an airborne geophysical survey around Kongsberg region covering Krøderen, Sokna, Høneføss, Kongsberg, Vikersund, Hokksund and Hvittingfoss regions during 2008-2011. This report describes and documents the acquisition, processing and visualization of recorded datasets. The geophysical survey preformed herein results in total 13985 line km that covers approximately an area of 2797 km2.
During June, 1997, a helicopter geophysical survey was carried out over Krokskogen, an area immediately northwest from Oslo. The purpose of the survey was to provide geophysical information to be used with geological datao to help determine the best route for tunneling from Sandvika to Hønefoss. Approximately 900 line-kilometers of radiometric, magnetometric and electromagnetic data were acquired, coverinbg an area of approximately 180 sq km. The average flying height was 80 m.
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