Burns, L.E., Fugro Airborne Surveys Corp., and Fugro GeoServices, Inc., 2013, Middle Styx survey area: Airborne magnetic, electromagnetic, and radiometric data in line (point), grid, vector, and map formats, Lime Hills and Tyonek quadrangles, southcentral Alaska: Geophysical Report GPR 2013-2, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), Fairbanks, AK, USA.Online Links:
Planar coordinates are encoded using row and column
Abscissae (x-coordinates) are specified to the nearest 25
Ordinates (y-coordinates) are specified to the nearest 25
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.978698.
//Flight 4018
//Date 2012/09/24
Line 30010 (or Tie instead of Line when appropriate)
Followed by all records for points sampled along Line 30010.
(Pattern is repeated for each line number).
The 'ID CELL' content, particularly combined with the definitions below for this particular survey, provides information about the flight line layout.
(Source: L.E. Burns & Fugro Airborne Surveys)
Definitions of the 'LINE' and 'FLIGHT' attributes are listed below.
LINE TYPES and SYMBOLS:
Traverse lines - flown at a heading of 70 degrees (NE-SW)
Tie lines - flown at a heading of 160 degrees (NW-SE)
Border lines - present inside and parallel to the survey
tract border where traverse or tie lines
are not parallel to the border
Traverse lines - 'L' (GDB file); 'LINE' (XYZ file)
Tie and border lines - 'T' (GDB file); 'TIE' (XYZ file)
LINE NUMBERS
Planned flight lines increase by 10 in a consistent fashion.
For this project, traverse line numbers increase from north to
south; tie line numbers increase from southwest to northeast; and
border line numbers increase in a clockwise direction.
When more than one uninterrupted flight traverse was needed
to complete a planned flight line, the fifth digit of the line
number is increased by '1' for each new flight segment/version.
MAIN LINE NUMBERS:
Lowest Traverse Lines: L30010 (north)
Highest Traverse Lines: L30470 (south)
Lowest Tie Lines: T39010 (southwest)
Highest Tie Lines: T39060 (northeast)
Lowest Border Lines: T39070 (western border,
line numbers progress in clockwise direction)
Highest Border Lines: T39110 (southwest)
------------------------------------------------------------
'FLIGHT' DESIGNATORS
The first digit of the 4 digit flight designator identifies
the HeliDAS (data acquisition system), in this case '4'. The
remaining three digits are the flight identification number,
e.g., '018'.
| Range of values | |
|---|---|
| Minimum: | 476045.34 |
| Maximum: | 501309.41 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 6844483.07 |
| Maximum: | 6872140.01 |
| Units: | m |
The attribute measurement resolution is 0.1 second. The values increase from the beginning of a flight to the end. Only FIDs during production flights are included in the database.
| Range of values | |
|---|---|
| Minimum: | 61.7338904 |
| Maximum: | 61.9828849 |
| Units: | degrees |
| Range of values | |
|---|---|
| Minimum: | -153.4557404 |
| Maximum: | -152.9774646 |
| Units: | degrees |
| Range of values | |
|---|---|
| Minimum: | 4013 |
| Maximum: | 4052 |
| Units: | flight |
| Range of values | |
|---|---|
| Minimum: | 2012/09/24 |
| Maximum: | 2012/10/12 |
| Units: | day |
| Range of values | |
|---|---|
| Minimum: | 12.57 |
| Maximum: | 348.28 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 6.92 |
| Maximum: | 394.87 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 646.06 |
| Maximum: | 2074.59 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 601.97 |
| Maximum: | 2043.65 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 55604.12 |
| Maximum: | 55869.11 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | -153.88 |
| Maximum: | 111.11 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | 55344.41 |
| Maximum: | 56714.99 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | 55344.41 |
| Maximum: | 56714.99 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | 55336.00 |
| Maximum: | 56707.61 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | 55638.98 |
| Maximum: | 55761.86 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | -353.95 |
| Maximum: | 1049.32 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | 55265.65 |
| Maximum: | 56668.92 |
| Units: | nT |
| Range of values | |
|---|---|
| Minimum: | -214.04 |
| Maximum: | 180.49 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -5.97 |
| Maximum: | 320.57 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -68.98 |
| Maximum: | 81.75 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -12.18 |
| Maximum: | 89.46 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -66.67 |
| Maximum: | 162.71 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -13.53 |
| Maximum: | 168.16 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -144.88 |
| Maximum: | 568.05 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -15.49 |
| Maximum: | 454.17 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -136.41 |
| Maximum: | 895.69 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -128.70 |
| Maximum: | 1095.02 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -215.71 |
| Maximum: | 178.70 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -2.64 |
| Maximum: | 320.40 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -69.11 |
| Maximum: | 78.23 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -11.17 |
| Maximum: | 89.07 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -62.90 |
| Maximum: | 163.30 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -1.51 |
| Maximum: | 168.56 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -145.50 |
| Maximum: | 568.08 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -1.05 |
| Maximum: | 454.23 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -130.48 |
| Maximum: | 895.71 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -1.11 |
| Maximum: | 1092.92 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | 0.56 |
| Maximum: | 1325 |
| Units: | ohm m |
| Range of values | |
|---|---|
| Minimum: | 17.00 |
| Maximum: | 10750 |
| Units: | ohm m |
| Range of values | |
|---|---|
| Minimum: | 25.16 |
| Maximum: | 60000 |
| Units: | ohm m |
| Range of values | |
|---|---|
| Minimum: | -111.33 |
| Maximum: | 313.15 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | -105.96 |
| Maximum: | 82.82 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | -124.65 |
| Maximum: | 49.33 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | -38.82 |
| Maximum: | 65.09 |
| Units: | unitless |
| Range of values | |
|---|---|
| Minimum: | -13.71 |
| Maximum: | 96.31 |
| Units: | unitless |
| Range of values | |
|---|---|
| Minimum: | 0.00 |
| Maximum: | 0.00 |
| Units: | unitless |
| Range of values | |
|---|---|
| Minimum: | 0.00 |
| Maximum: | 0.00 |
| Units: | unitless |
| Range of values | |
|---|---|
| Minimum: | 0.00 |
| Maximum: | 0.00 |
| Units: | unitless |
Described above in MAG and EM LINEDATA
| Range of values | |
|---|---|
| Minimum: | 476045.34 |
| Maximum: | 501309.41 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 6844483.07 |
| Maximum: | 6872140.01 |
| Units: | m |
The attribute measurement resolution is 0.1 second. The values increase from the beginning of a flight to the end. Only FIDs during production flights are included in the database.
| Range of values | |
|---|---|
| Minimum: | 61.7338904 |
| Maximum: | 61.9828849 |
| Units: | degrees |
| Range of values | |
|---|---|
| Minimum: | -153.4557404 |
| Maximum: | -152.9774646 |
| Units: | degrees |
| Range of values | |
|---|---|
| Minimum: | 4013 |
| Maximum: | 4052 |
| Units: | flight |
| Range of values | |
|---|---|
| Minimum: | 2012/09/24 |
| Maximum: | 2012/10/12 |
| Units: | day |
| Range of values | |
|---|---|
| Minimum: | 37.57 |
| Maximum: | 373.28 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 601.97 |
| Maximum: | 2043.65 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 281 |
| Maximum: | 1830 |
| Units: | counts |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 50 |
| Units: | counts |
| Range of values | |
|---|---|
| Minimum: | 5 |
| Maximum: | 72 |
| Units: | counts |
| Range of values | |
|---|---|
| Minimum: | 18 |
| Maximum: | 209 |
| Units: | counts |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 19 |
| Units: | counts |
| Range of values | |
|---|---|
| Minimum: | 45 |
| Maximum: | 194 |
| Units: | cps (counts per second) |
| Range of values | |
|---|---|
| Minimum: | 29.93 |
| Maximum: | 316.60 |
| Units: | m |
| Range of values | |
|---|---|
| Minimum: | 999 |
| Maximum: | 999 |
| Units: | ms (millisecond) |
| Range of values | |
|---|---|
| Minimum: | 78.77 |
| Maximum: | 95.26 |
| Units: | kPa (kilopascal) |
| Range of values | |
|---|---|
| Minimum: | -10.2 |
| Maximum: | 6.1 |
| Units: | °C |
| Range of values | |
|---|---|
| Minimum: | 203.63 |
| Maximum: | 2220.99 |
| Units: | cps (counts per second) |
| Range of values | |
|---|---|
| Minimum: | -3.03 |
| Maximum: | 41.87 |
| Units: | cps (counts per second) |
| Range of values | |
|---|---|
| Minimum: | -0.47 |
| Maximum: | 100.84 |
| Units: | cps (counts per second) |
| Range of values | |
|---|---|
| Minimum: | -4.57 |
| Maximum: | 217.07 |
| Units: | cps (counts per second) |
| Range of values | |
|---|---|
| Minimum: | -0.07 |
| Maximum: | 15.56 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -0.80 |
| Maximum: | 11.08 |
| Units: | ppm |
| Range of values | |
|---|---|
| Minimum: | -0.08 |
| Maximum: | 3.73 |
| Units: | % |
| Range of values | |
|---|---|
| Minimum: | 0.03 |
| Maximum: | 136.88 |
| Units: | ppm/% |
| Range of values | |
|---|---|
| Minimum: | 0.09 |
| Maximum: | 223.28 |
| Units: | ppm/% |
| Range of values | |
|---|---|
| Minimum: | 0.04 |
| Maximum: | 197.49 |
| Units: | unitless |
| Range of values | |
|---|---|
| Minimum: | 10.39 |
| Maximum: | 113.32 |
| Units: | nGy/h (nanogray / hour) |
The radiometric spectrum for each sample point is in the form of an array.
The Geosoft grid consists of one file (.GRD). Each ER Mapper grid consists of two files, a header (projection) file (.ERS) and a data file (no extension). Both ER Mapper files are necessary to view a grid or to convert it to another software format. In addition, Geosoft projection files (GI) are included for both Geosoft and ER Mapper grids files, which automatically sets the projection of the grid in the associated software if the appropriate GI file is placed in the same directory as the grid. (Source: Fugro Airborne Surveys)
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Grid file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
Geotiff file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
KMZ file
Each file format (DXF and shape file) contains the same information. A dxf file (e.g. MSt_magRMI.dxf) contains the information in layers within the file, and the shape file format consists of each layer as a separate file (e.g. MST_magRMI_1, MST_magRMI_2, MST_magRMI_3, and MST_magRMI_4). Most sets of shape files in this publication consist of the numbers 1-4 or 1-5. Please refer to the map legends for appropriate line widths and particular label placement. Neither the DXF nor the shape files are attributed. All labeling is done through individual alphanumeric characters, e.g. line number 3050 would be represented by 4 individual characters instead of one number.(Source: Fugro Airborne Surveys)
vector file
vector file
vector file
vector file
vector file
vector file
vector file
vector file
vector file
vector file
vector vector file
vector file
vector file
vector file
vector file containing alphanumeric characters
file containing non-alphanumeric characters
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
map in PDF and HPGL/2 format
Funding was provided by the Alaska State Legislature for the Strategic and Critical Minerals Capital Improvement Project (CIP), a part of the DGGS Airborne Geophysical/Geological Mineral Inventory (AGGMI) program.
The survey was part of the Strategic and Critical Minerals Capital Improvement Project (CIP), a subset of the Alaska Airborne Geophysical/Geological Mineral Inventory Program. The program was funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). The program seeks to catalyze private-sector mineral development investment. The program delineates mineral zones on Alaska state lands that: 1) have major economic value; 2) can be developed in the short term to provide high quality jobs for Alaska; and 3) will provide economic diversification to help offset the loss of Prudhoe Bay oil revenue.
Akima, H., 1970, A new method of interpolation and smooth curve fitting based on local procedures: Journal of the Association of Computing Machinery v. 7, no. 4.Online Links:
- None
Fraser, D.C., 1978, Resistivity mapping with an airborne multicoil electromagnetic system: Geophysics v. 43.Online Links:
- None
Alaska Department of Natural Resources - Land Records Information Section, 1995, Alaska PLSS Section Grid: State of Alaska, Department of Natural Resources, Division, Land Records Information Section (LRIS), Anchorage, Alaska.Online Links:
- <http://mapper.landrecords.info/>
- <http://dnr.alaska.gov/SpatialUtility/SUC?cmd=vmd&layerid=45> (metadata)
Flights were performed with an Aerospatiale AS-350-B3 helicopter at a mean terrain clearance of 200 feet (61 m) along N70E (70 degrees) survey flight lines with one-quarter mile (402.3 m) line spacing. Tie lines were flown at a heading of 160 degrees, perpendicular to the flight lines, and were spaced at intervals of approximately 3 miles (4,828 m).
A Novatel OEM4-G2L Global Positioning System was used for navigation and flight path recovery. The helicopter position was derived every 0.5 seconds (2 Hz); the ground GPS base station data were collected at 1.0 second (1 Hz) intervals. The positional xy data are interpolated from 2 Hz to 10 Hz. The use of the differentially-corrected base station data results in a positional accuracy of better than five meters. Flight path positions were projected onto the Clarke 1866 (UTM zone 5N) spheroid, 1927 North American datum using a central meridian (CM) of 153 degrees, a north constant of 0, and an east constant of 500,000.
Data sources used in this process:
The calculated magnetic tilt grid (MSt_TiltDer) is the angle between the horizontal gradient and the total vertical gradient, and is useful for identifying the depth and type of magnetic source. The tilt angle is positive over the source, crosses through zero at, or near, the edge of a vertical sided source, and is negative outside the source zone. It has the added advantage of responding equally well to shallow and deep sources and is able to resolve deeper sources that may be masked by larger responses caused by shallower sources.
The first vertical derivative grid was calculated using a fast Fourier transform (FFT)-based frequency-domain filtering algorithm. The vertical gradient algorithm enhances the response of magnetic bodies in the upper 500 m and attenuates the response of deeper bodies. The resulting (calculated) vertical gradient grid ('MSt_1VD') provides better definition and resolution of near-surface magnetic units and helps to identify weak magnetic features that may not be evident in the total field data.
All magnetic and derivative magnetic grids were then resampled from the 80-m cell size down to a 25-m cell size using a modified Akima (1970) technique to produce the maps and final grids contained in this publication. When resampling the grids to a 25-m cell size, the original grids are scanned to determine the minimum and maximum values which the new grids are then limited to, avoiding extreme extrapolation errors between lines.
Data sources used in this process:
The apparent resistivity and apparent depth were then calculated from the inphase and quadrature data for all coplanar frequencies. The calculation used the pseudo-layer (or buried) half-space model defined by Fraser (1978). This model consists of a resistive layer overlying a conductive half-space (or pseudo-layer). The apparent depth is defined as the sensor-source distance minus the measured altitude of the sensor above the ground. The apparent depth channels estimate the depth of a conductive half-space. The calculated apparent depth is the depth to the top of this conductive layer. The apparent depth (or thickness) parameter will be positive when the upper layer is more resistive than the underlying material, in which case the apparent depth may be quite close to the true depth, assuming it is a buried half-space and the altimeter is correct. The apparent depth will be negative when the upper layer is more conductive than the underlying material, and will be zero when a homogeneous half-space exists. The apparent depth parameter must be interpreted cautiously because it will contain any errors that might exist in the measured altitude of the EM bird (e.g., as caused by a dense tree cover). Manual leveling of the inphase and quadrature of each coil pair, based on the resistivity data and comparisons to the data from the other frequencies, was performed. Automated micro-leveling is carried out in areas of low signal.
The EM data were interpolated onto a regular 80-m grid using a modified Akima (1970) technique. The resulting grids were subjected to a 3x3 Hanning filter and resampled to a 25-m cell size before contouring and map production. When resampling the grids to a 25-m cell size, the original grids are scanned to determine the minimum and maximum values which the new grids are then limited to, avoiding extreme extrapolation errors between lines.
Data sources used in this process:
Data sources used in this process:
Data sources used in this process:
Burns, L.E., Fugro Airborne Surveys Corp., and Stevens Exploration Management Corp., 2008, Line, grid, and vector data and plot files for the airborne geophysical survey of the Styx River Survey, southcentral Alaska: Geophysical Report GPR 2008-3, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), Fairbanks, AK, USA.Online Links:
Burns, L.E., Fugro Airborne Surveys Corp., and Fugro GeoServices, Inc., 2013, Dalzell Creek survey area: Airborne Magnetic, Electromagnetic, and Radiometric Data in Line (Point), Grid, Vector, and Map formats, McGrath Quadrangle, southcentral Alaska: Geophysical Report GPR 2013-3, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), Fairbanks, AK, USA.Online Links:
Survey contracts specified the conditions and specifications under which these data were collected. Altimeter, heading, lag, and frequent EM calibrations were done. More information will be available in the project report to be published in the future.
The helicopter position was derived every 0.5 seconds using post-flight differential positioning to an accuracy of better than 1 m.
The laser altimeter ('ALTLAS_BIRD'), located in the bird (EM equipment and magnetometer housing), had a stated resolution of 0.10 meter. The ALTLAS_BIRD value may be unreliable over bodies of water where the laser returns are scattered.
The linedata files MiddleStyx_EM and MiddleStyx_RAD each contain 545,899 records. The radiometric data, sampled every 1.0 seconds, produced a maximum of 54,590 sample points, about a tenth of the total maximum records. The linedata files have very few missing data values. These are elaborated on in the linedata readme document.
Data for this survey were collected by a single subcontractor (Fugro Airborne Surveys) who was responsible for collecting and processing the data. All the data were collected with the same instruments (magnetometers, electromagnetic bird and sensors, gamma ray spectrometer, altimeters, and navigational system).
Are there legal restrictions on access or use of the data?
- 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.
(907)451-5020 (voice)
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GPR 2013-2
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.
Current geophysics publications are available on paper or Mylar. Please ask for the maps to be printed from HPGL/2 files to ensure the best quality image. To purchase 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.
| Data format: | Geosoft binary float (GRD) (version Unknown) |
|---|---|
| Media you can order: |
DVD
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| Data format: | ER Mapper (ERS) (version Unknown) |
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| Data format: | ESRI Shape (SHP) (version Unknown) |
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| Data format: | Autocad DXF (version 2000) |
|---|---|
| Media you can order: |
DVD
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| Data format: | PDF (version 1.5) |
|---|---|
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DVD
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| Data format: | HPGL/2 (version unknown) |
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| Network links: |
<http://dx.doi.org/10.14509/25419> |
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Digital files on DVD are available for $10 plus shipping and are free when downloaded online.
Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: cash, check, money order, VISA, or MasterCard. The geophysics page of the DGGS web site (<http://www.dggs.alaska.gov/pubs/geophysics>) has geophysical order forms for this project and others.
Software with ability to use, import, or convert Geosoft float GRD, Geosoft binary GDB or ASCII XYZ files, Autocad DXF files, ESRI Shape files, Adobe Acrobat PDF, Google Earth files, and text files. Free downloadable interfaces to view or convert the gridded and dxf files are available at the Geosoft Web site (<http://www.geosoft.com>; Oasis Montaj viewer). The KMZ files can be dragged and dropped into the 'My Places' folder of the free downloadable 'Google Earth' software. Freeware software 'printfile' (<http://www.lerup.com/printfile/>) prints HPGL/2 files easily on compatible printers. The HPGL/2 files have brighter colors and sharper topography than the PDF maps and should be used for printing when possible. The PDF format maps are the only maps digitally viewable in this publication.
(907)451-5021 (voice)