Identification_Information: Citation: Citation_Information: Originator: Burns, L.E. Originator: Graham, G.R.C. Originator: Emond, A.M. Originator: Stevens Exploration Management Corp. Originator: Fugro Airborne Surveys Publication_Date: 2020 Title: Alaska Highway corridor electromagnetic and magnetic airborne geophysical survey data compilation Geospatial_Data_Presentation_Form: digital data Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2020-15 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 17 p. Online_Linkage: https://doi.org/10.14509/30462 Description: Abstract: The Alaska Highway corridor electromagnetic and magnetic airborne geophysical survey is located in interior Alaska along the Alaska Highway corridor, from Delta Junction to the Canadian border. Frequency domain electromagnetic and magnetic data were collected with the RESOLVE system from August 27th, 2005 to January 16th, 2006. A total of 22,948.5 line kilometers were collected covering 8117.5 square kilometers. Line spacing was 400 meters (m). The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30462. Purpose: This airborne geophysical survey was acquired to gather geologic information to assess the geologic hazards, construction materials, and mineral potential on the Alaska Highway corridor in east-central Alaska. The geophysical information acquired helps provide information on conductive overburden, potential construction materials, permafrost, fractures and faulting, and other information. Prospects within the survey area include Road Metal, Triple Z (ASARCO), and Discovery Zone. In addition, these data are to assist geologic mapping in the region. Supplemental_Information: >ascii_data: ASCII format line data, other ASCII data >databases_geosoft: Geosoft format database of line data, other Geosoft format databases >documents: Project and field reports, survey background information, gridded data explanations, other supporting documentation >grids_ermapper: Geographically registered gridded data, ER Mapper ERS format >grids_geosoft: Geosoft-format binary grids, these grids can be viewed in ESRI ArcMap using a free plugin from Geosoft or using the free viewer available from Geosoft >images_registered: GeoTiff format images of all gridded data >kmz: Keyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programs >maps_pdf_format: Printable maps in pdf format >maps_prn_format: Printable maps in HPGL/G printer file format with extension .prn >profiles_stacked: Distance-based profiles of the digitally recorded geophysical data are generated and plotted at an appropriate scale. The profiles display electromagnetic anomalies with their respective interpretive symbols >resistivity_models: ACSII CSV format resistivity models in project coordinates with data field guides, figures and supporting documentation in ASCII text, PDF, KML, and/or other formats. >vector_data: Line path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf format Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -145.897848 East_Bounding_Coordinate: -140.851779 North_Bounding_Coordinate: 64.235769 South_Bounding_Coordinate: 62.396392 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Aeromagnetic Theme_Keyword: Aeromagnetic Data Theme_Keyword: Aeromagnetic Map Theme_Keyword: Aeromagnetic Survey Theme_Keyword: Airborne Geophysical Survey Theme_Keyword: Analytic Signal Theme_Keyword: Apparent Resistivity Data Theme_Keyword: Apparent Resistivity Map Theme_Keyword: Apparent Resistivity Survey Theme_Keyword: Conductivity Survey Theme_Keyword: Electromagnetic Data Theme_Keyword: Electromagnetic Survey Theme_Keyword: Exploration Theme_Keyword: First Vertical Derivative Theme_Keyword: Frequency Domain Electromagnetic Data Theme_Keyword: Geologic Theme_Keyword: Geology Theme_Keyword: Geophysical Map Theme_Keyword: Geophysical Survey Theme_Keyword: Geophysics Theme_Keyword: Geophysics Search Tag Theme_Keyword: Gridded Data Theme_Keyword: Line Data Theme_Keyword: Magnetic Data Theme_Keyword: Magnetic Survey Theme_Keyword: Magnetics Theme_Keyword: Remote Sensing Theme_Keyword: Resistivity Theme_Keyword: Resistivity Survey Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Andrew Lake Place_Keyword: Arrow Creek Place_Keyword: Bear Creek Place_Keyword: Beaver Creek Place_Keyword: Berry Creek Place_Keyword: Big John Lake Place_Keyword: Big Lake Place_Keyword: Billy Creek Place_Keyword: Birch Lake Place_Keyword: Bitters Creek Place_Keyword: Black Lake Place_Keyword: Cathedral Bluffs Place_Keyword: Cathedral Rapids Place_Keyword: Cemetery Lake Place_Keyword: Charlieskin Creek Place_Keyword: Charlieskin Village Place_Keyword: Cheneathda Hill Place_Keyword: Chief Creek Place_Keyword: Chisana Mountain Place_Keyword: Chisana River Place_Keyword: City Of Delta Junction Place_Keyword: Clearwater Creek Place_Keyword: Clearwater Lake Place_Keyword: Clearwater Lakes Place_Keyword: Close Lake Place_Keyword: Cockscomb Creek Place_Keyword: Craig Lake Place_Keyword: Damundtali Lake Place_Keyword: Deadman Lake Place_Keyword: Delta River Place_Keyword: Desper Creek Place_Keyword: Dog Lake Place_Keyword: Donna Lake Place_Keyword: Dot Lake Place_Keyword: Dot Lake Village Place_Keyword: Dougherty Creek Place_Keyword: Dry Creek Place_Keyword: Eliza Lake Place_Keyword: Fish Camp Lake Place_Keyword: Fish Creek Place_Keyword: Fish Lake Place_Keyword: Forest Lake Place_Keyword: Four Mile Lake Place_Keyword: Gardiner Creek Place_Keyword: George Creek Place_Keyword: Gerstle River Place_Keyword: Glacier Hill Place_Keyword: Glaman Lake Place_Keyword: Goodpaster Flats Place_Keyword: Granite Creek Place_Keyword: Grass Lake Place_Keyword: Hajdukovich Creek Place_Keyword: Healy Lake Place_Keyword: Hidden Lake Place_Keyword: Hillside Lake Place_Keyword: Horn Mountain Place_Keyword: Hudeuc Lake Place_Keyword: Independent Ridge Place_Keyword: Indian Village Place_Keyword: Island Lake Place_Keyword: Jan Lake Place_Keyword: Jarvis Creek Place_Keyword: Joe Lake Place_Keyword: Johnson River Place_Keyword: Kalukna River Place_Keyword: Kalutna River Place_Keyword: Kathakne Place_Keyword: Kathakne Village Place_Keyword: Knob Ridge Place_Keyword: Ladue River Place_Keyword: Lake George Place_Keyword: Lake Mansfield Place_Keyword: Leaf Lake Place_Keyword: Lisa Lake Place_Keyword: Long Lake Place_Keyword: Louie Lake Place_Keyword: Macomb Plateau Place_Keyword: Mansfield Creek Place_Keyword: Mansfield Village Place_Keyword: Mark Creek Place_Keyword: Midway Lake Place_Keyword: Mirror Creek Place_Keyword: Monte Lake Place_Keyword: Moon Lake Place_Keyword: Moose Creek Place_Keyword: Moose Lake Place_Keyword: Moosehead Lake Place_Keyword: Mount Neuberger Place_Keyword: Nabesna River Place_Keyword: Nabesna Village Place_Keyword: Northway Place_Keyword: Northway Junction Place_Keyword: Northway Village Place_Keyword: Nuziamundcho Lake Place_Keyword: Open Creek 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). 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Data_Set_Credit: Funding was provided by the Alaska State Legislature. Cross_Reference: Citation_Information: Originator: DGGS Staff Publication_Date: 2014 Title: Airborne GeophysWeb: A compilation of geophysical data from DGGS and cooperating agencies Series_Information: Series_Name: Digital Data Series Issue_Identification: DDS 2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: http://doi.org/10.14509/27222 Cross_Reference: Citation_Information: Originator: DGGS Staff Publication_Date: 2016 Title: Alaska merged geophysical data grids Series_Information: Series_Name: Digital Data Series Issue_Identification: DDS 12 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 3 p Online_Linkage: http://doi.org/10.14509/29555 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geophysical data were acquired according to the contractor, contract, and request-for-proposals specifications. For additional detail about survey parameters, see the accompanying project report available in the documents directory of this data distribution package. Logical_Consistency_Report: Data originate from one company using the same contract specifications for all data. The originating coordinate system was retained for all publication products. Completeness_Report: This data set includes files that contain processed aeromagnetic measurements, electromagnetic measurements, altimetry measurements, and locational data for the entire survey area. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: These data are positioned with post-processed differential GPS. Discussion of grid resolution and factors that may impact the overall horizontal accuracy of the gridded data is available in the documents directory of this data distribution package. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not applicable Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Burns, L.E. Originator: Fugro Airborne Surveys Corp. Originator: Stevens Exploration Management Corp. Publication_Date: 2006 Title: Line, grid, and vector data, and plot files for the airborne geophysical survey of the Alaska Highway corridor, east-central Alaska Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2006-6 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 DVD Online_Linkage: http://doi.org/10.14509/14864 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Burns, L.E. and others, 2006 Source_Contribution: Data collection, processing, and delivery Source_Information: Source_Citation: Citation_Information: Originator: Burns, L.E. Originator: Fugro Airborne Surveys Corp. Originator: Stevens Exploration Management Corp. Publication_Date: 2008 Title: Final processed database for the airborne geophysical surveys of the Alaska Highway corridor, east-central Alaska Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2006-8 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 DVD Online_Linkage: http://doi.org/10.14509/17761 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Burns, L.E. and others, 2008 Source_Contribution: Data collection, processing, and delivery Process_Step: Process_Description: Data collection, processing, and delivery - The airborne geophysical data were acquired under contract with Stevens Exploration Management Corp. Airborne geophysical data for the area were acquired and processed by Fugro Airborne Surveys. The contractor's project report and other supporting documents are in the "documents" digital data package. They provide detailed documentation of the system specifications, data collection, processing, and delivery. Source_Used_Citation_Abbreviation: Burns, L.E. and others, 2006 Source_Used_Citation_Abbreviation: Burns, L.E. and others, 2008 Process_Date: 2006 Process_Step: Process_Description: Grid development - The analytic signal grid was generated by using the analytic signal function in Geosoft Oasis Montaj v9 on. The derivatives in the analytic signal calculation were computed using a fast Fourier transform (FFT) based 2D filter. Process_Date: 2019 Process_Step: Process_Description: RGB GeoTiff creation - RGB GeoTIFF raster files of gridded data were exported using Geosoft v9 by loading each Geosoft grid onto a map and using the map export tool. Process_Date: 2019 Process_Step: Process_Description: GeoPDF creation - Geospatial pdf file created using the Export Map function in Geosoft Oasis Montaj v9 with all maps layers visible. Process_Date: 2019 Process_Step: Process_Description: DXF conversion and geographic referencing - Contractor provided AutoCAD DXF files were converted to an ESRI Geodatabase in ArcMap v10 using the CAD to Geodatabase tool. Process_Date: 2019 Process_Step: Process_Description: Standard Boundary Polygon - The boundary polygon was generated by loading the final line data in Geosoft Oasis montaj v9. The 8200 Hz apparent resistivity data was gridded using the Minimum Curvature option with the following settings: grid cell size = 25 m, blanking distance = 800 m, cells to extend beyond data = 2. The polygon was created and drawn on the map using Grid Outline tool with edge resolution = 0.2. The polygon was exported to ESRI shapefile. Process_Date: 2019 Process_Step: Process_Description: Keyhole markup language (kml) KMZ archive creation - Data were exported from Geosoft and ESRI ArcMap to kml format files and/or KMZ archives. These files were then combined and modified in Google Earth Pro to create the final KMZ file. Process_Date: 2019 Process_Step: Process_Description: Simulated Magnetic Total Field - In this publication's older products and documentation the magnetic data products have been referred to as Total Field Magnetics on the maps and the MAG channel in the line data and 'mag' as a filename abbreviation. The new term 'sim_magtf' has been created to rename and clarify that the data are not representative of the true total magnetic field as the IGRF values have been removed with a single average value added back to the entire dataset, resulting in the IGRF gradient being removed. The term simulated magnetic total field and the filename abbreviation 'sim_magtf' is now used to identify these magnetic data. Process_Date: 2019 Process_Step: Process_Description: Data cataloged for archival and publication - All files were renamed and placed in a standardized set of folders according to the DGGS Geophysics Data Management Manual. Where applicable and as needed data were converted to newer file formats and new files were created. Supporting documentation including but not limited to readme text files, maps, figures, survey overview report, missing data type explanations, and metadata were created. Process_Date: 2019 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 7 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -141 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: .00000001 Ordinate_Resolution: .00000001 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.40000000037 Denominator_of_Flattening_Ratio: 294.978698199999997 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: ascii_data Entity_Type_Definition: ASCII format line data, other ASCII data Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys Entity_Attribute_Layer_Name: ascii_data Detailed_Description: Entity_Type: Entity_Type_Label: databases_geosoft Entity_Type_Definition: Geosoft format database of line data, other Geosoft format databases Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys Entity_Attribute_Layer_Name: databases_geosoft Detailed_Description: Entity_Type: Entity_Type_Label: documents Entity_Type_Definition: Project and field reports, survey background information, gridded data explanations, other supporting documentation Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: documents Detailed_Description: Entity_Type: Entity_Type_Label: grids_ermapper Entity_Type_Definition: Geographically registered gridded data, ER Mapper ERS format Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: grids_ermapper Detailed_Description: Entity_Type: Entity_Type_Label: grids_geosoft Entity_Type_Definition: Geosoft-format binary grids, these grids can be viewed in ESRI ArcMap using a free plugin from Geosoft or using the free viewer available from Geosoft Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: grids_geosoft Detailed_Description: Entity_Type: Entity_Type_Label: images_registered Entity_Type_Definition: GeoTiff format images of all gridded data Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: images_registered Detailed_Description: Entity_Type: Entity_Type_Label: kmz Entity_Type_Definition: Keyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programs Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: kmz Detailed_Description: Entity_Type: Entity_Type_Label: maps_pdf_format Entity_Type_Definition: Printable maps in pdf format Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys Entity_Attribute_Layer_Name: maps_pdf_format Detailed_Description: Entity_Type: Entity_Type_Label: maps_prn_format Entity_Type_Definition: Printable maps in pdf format Entity_Type_Definition_Source: Print format maps in HPGL/G printer file format with extension .prn Entity_Attribute_Layer_Name: maps_prn_format Detailed_Description: Entity_Type: Entity_Type_Label: profiles_stacked Entity_Type_Definition: Distance-based profiles of the digitally recorded geophysical data are generated and plotted at an appropriate scale. The profiles display electromagnetic anomalies with their respective interpretive symbols Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys Entity_Attribute_Layer_Name: profiles_stacked Detailed_Description: Entity_Type: Entity_Type_Label: resistivity_models Entity_Type_Definition: ACSII CSV format resistivity models in project coordinates with data field guides, figures and supporting documentation in ASCII text, PDF, KML, and/or other formats. Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys Entity_Attribute_Layer_Name: resistivity_models Detailed_Description: Entity_Type: Entity_Type_Label: vector_data Entity_Type_Definition: Line path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf format Entity_Type_Definition_Source: Stevens Exploration Management Corp. and Fugro Airborne Surveys and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: vector_data Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: GPR 2020-15 Distribution_Liability: 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. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: DGGS geophysics datasets are typically compilations of multiple digital data file formats. These formats may include: GeoTiff, ESRI shapefile, Geosoft binary grid (GRD), Microsoft Office documents, PDF, ER Mapper ERS, ASCII text files (including CSV), Geosoft ASCII grid (GXF), Geosoft database, AutoCAD DXF, Geosoft plot file (PLT), Printer files (HPP, PRN, or other), digital images (multiple formats), digital video (multiple formats), Geosoft ASCII XYZ, Geosoft ASCII files (PLY, i0, EXP), and KMZ Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/30462 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20210512 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Person: Simone Montayne Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: https://dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions