Dataset Name

Tanacross geophysics

Bibliographic Reference

Emond, A.M., Saltus, R.W., Graham, Gina, and Goldak Airborne Surveys, 2015, Airborne magnetic geophysical survey of the Tanacross region, Alaska: Alaska Division of Geological & Geophysical Surveys Geophysical Report 2015-6. http://doi.org/10.14509/29514

Additional Notes

This publication release is a compilation of all files associated with this geophysics project. We present both the final processed data as well as a broad array of derivative products in various formats. The available file types and associated names are listed below.

Table of Contents

Layer Name: metadata
Layer Description: metadata files, read me files and reports
/metadata/GPR2015-6.faq.html
/metadata/GPR2015-6.txt
/metadata/GPR2015-6.xml

Layer Name: grids_ermapper
Layer Description: Geographically registered gridded data, ErMapper ERS format
/grids_ermapper/readme_tanacross_grids_ermapper.txt
/grids_ermapper/tanacross_analyticsignal
/grids_ermapper/tanacross_analyticsignal.ers
/grids_ermapper/tanacross_calculated1vd
/grids_ermapper/tanacross_calculated1vd.ers
/grids_ermapper/tanacross_calculated2vd
/grids_ermapper/tanacross_calculated2vd.ers
/grids_ermapper/tanacross_ground_clearance
/grids_ermapper/tanacross_ground_clearance.ers
/grids_ermapper/tanacross_hgradient010
/grids_ermapper/tanacross_hgradient010.ers
/grids_ermapper/tanacross_hgradient100
/grids_ermapper/tanacross_hgradient100.ers
/grids_ermapper/tanacross_residualmag
/grids_ermapper/tanacross_residualmag.ers
/grids_ermapper/tanacross_tiltderivative
/grids_ermapper/tanacross_tiltderivative.ers

Supplemental Information


 >Project Name: Tanacross
 >Contracting Agency: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)
 >DGGS Section: Mineral Resources section
 >Program: Funding Source: The USGS Mineral Resources Program
 >Contractor: Goldak Airborne Surveys
 >DGGS Contract Manager: Abraham Emond
 >Line km: 26,533
 >Data Acquisition Start Date (YYYY-MM-DD): 2015-06-17
 >Data Acquisition End Date (YYYY-MM-DD): 2015-07-31
 >Platform: Fixed Wing Aircraft
 >Aircraft Model: Piper PA-31 Navajo
 >Survey Altitude Model: Smooth Drape
 >Target Ground Clearance: 100 meters
 >Mean Ground Clearance: 290 meters
 >Traverse: Line Azimuth: 10 degrees / 190 degrees
 >Traverse: Line Spacing: 500 meters
 >Tie: Line Azimuth: 100 degrees / 280 degrees
 >Tie: Line Spacing: 5000 m
 >Border lines: present around all non-parallel and non-perpendicular edges
 >Data Type: Magnetic
 >Magnetometer: three cesium vapor magnetometers mounted to aircraft
 >Positioning: GPS/GLONASS real-time and post-corrected differential
 >Additional equipment: flight path recovery camera, 3 external Garmin VIRB Elite action cameras, radar and barometric altimeters
 >
 >FLIGHT AND LINE NAMING
 >
 >Example: L11020:29082
 >
 >L = L for transverse (production)
 >1 = Line number digit 1
 >6 = Line number digit 2
 >0 = Line number digit 3
 >0 = Reflight number
 >:
 >1 = Flight number digit 1
 >4 = Flight number digit 2
 >
 >T = T for tie (cross)
 >8 = Line number digit 1
 >6 = Line number digit 2
 >0 = Line number digit 3
 >0 = Line number digit 3
 >0 = Reflight number
 >:
 >1 = Flight number digit 1
 >4 = Flight number digit 2

Metadata

Metadata is the data about the data and answers "Who, what, when, where, how and why?" about the dataset. Please see the DGGS Metadata README page for information about our metadata.

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.

Distribution Contact Information

Metadata Manager
Alaska Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, AK 99709-3707
Phone Number: (907)451-5020
Fax Number: (907)451-5050
E-mail: dggspubs@alaska.gov