- General - |
Geofile: | NFLD/3058 |
Companies: | Geological Survey of Newfoundland and Labrador |
Contractor: | Geo Data Solutions GDS Inc., Project P08041 |
Survey Area: | Corner Brook, Nfld. |
NTS Areas: | 12A/12; 12A/13; 12B/09; 12B/16; 12G/01; 12H/04; 12H/05 |
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- Survey Logistics - |
Survey Date: | Nov. 22, 2008 to March 27, 2009 |
Survey Extent: | 22754.0 line km; 2465.0 km tie; 25219.0 km total |
Altitude: | Piper Navajo PA-31 (C-GKSA): 90 m |
Line Spacing: | 200 m, Az: 130°; Ties: 2000 m, Az: 040° |
Positioning: | Differential GPS provided by 3 non-collinear Novatel L1/L2 DL-V3 GPS receivers on aircraft - to Novatel receiver at base; King KRA-10A radar altimeter; Honeywell PPT barometric altimeter; Panasonic WVCO484 colour video tracking camera |
Instrumentation: | Three Geometrics G822 split-beam cesium vapour magnetometers mounted at 14.8 m separation in aircraft wingtip pods (transverse gradient) and in a tail boom; RMS DAARC500 automatic aeromagnetic digital compensator; GEM Systems GSM-19 Overhauser base station mag |
Data Recorded: | Total field mag; longitudinal and transverse mag gradients |
Comments: | IGRF for year Jan. 21, 2009 and 500 m altitude removed from Total Field Mag data to yield residual; transverse and longitudinal gradients were determined from sensor differences. Data processing is described in detail in the report. |
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- Digital Data - |
Confidentiality Date: | July 7, 2009 |
Grid Cell Size: | 40 m |
Total Data Points: | 3379953 |
Projection of Data: | NAD83, UTM Zone 21 |
Data Comments: | The digital data have been released July 7, 2009. The 1:50 000 scale PDF maps are also accessible via the Geological Survey Home Page. The images, linked below, were exported from Oasis Montaj at high resolution (10 m). |
Links to Data: |
Contractor logistics and processing report, PDF format (1.9 Mb zip'd) |
Interpolated grids, Geosoft format, NAD83 (67.3 Mb zip'd) |
Digital files and channel description, MS-Word format (16.9 Mb zip'd) |
Profile archive, Geosoft database format (905 Mb zip'd) |
Residual Magnetic Field Map, 12A/12 (PDF format, 4.6 Mb) |
First Vertical Derivative of Magnetic Field Map, 12A/12 (PDF format, 5.6 Mb) |
Residual Magnetic Field Map, 12A/13 (PDF format, 11.2 Mb) |
First Vertical Derivative of Magnetic Field Map, 12A/13 (PDF format, 15.2 Mb) |
Residual Magnetic Field Map, 12B/09 (PDF format, 4.2 Mb) |
First Vertical Derivative of Magnetic Field Map, 12B/09 (PDF format, 5.2 Mb) |
Residual Magnetic Field Map, 12B/16 (PDF format, 10.8 Mb) |
First Vertical Derivative of Magnetic Field Map, 12B/16 (PDF format, 14.8 Mb) |
Residual Magnetic Field Map, 12G/01 (PDF format, 8.6 Mb) |
First Vertical Derivative of Magnetic Field Map, 12G/01 (PDF format, 10.8 Mb) |
Residual Magnetic Field Map, 12H/04 (PDF format, 8.0 Mb) |
First Vertical Derivative of Magnetic Field Map, 12H/04 (PDF format, 11.6 Mb) |
Residual Magnetic Field Map, 12H/05 (PDF format, 11.3 Mb) |
First Vertical Derivative of Magnetic Field Map, 12H/05 (PDF format, 14.8 Mb) |
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GIS Layers: |
Survey flight paths (NAD27, UTM Zone 21N, 0.4 Mb zip'd) |
Colour, shaded relief image, Total Magnetic Intensity (NAD27, 14.2 Mb zip'd) |
Colour, shaded relief image, Residual Magnetic Intensity (NAD27, 16.0 Mb zip'd) |
Colour, shaded relief image, First Vert. Derivative of Mag (NAD27, 26.3 Mb zip'd) |
Colour, shaded relief image, Second Vert. Derivative of Mag (NAD27, 44.2 Mb zip'd) |
Colour, shaded relief image, Horizontal Gradient of Mag (NAD27, 29.1 Mb zip'd) |
Colour, shaded relief image, Longitudinal Gradient of Mag (NAD27, 29.7 Mb zip'd) |
Colour, shaded relief image, Digital Terrain Model (NAD27, 36.2 Mb zip'd) |
Colour, shaded relief image, Total Magnetic Intensity (NAD83, 14.3 Mb zip'd) |
Colour, shaded relief image, Residual Magnetic Intensity (NAD83, 16.1 Mb zip'd) |
Colour, shaded relief image, First Vert. Derivative of Mag (NAD83, 26.5 Mb zip'd) |
Colour, shaded relief image, Second Vert. Derivative of Mag (NAD83, 47.3 Mb zip'd) |
Colour, shaded relief image, Horizontal Gradient of Mag (NAD83, 29.2 Mb zip'd) |
Colour, shaded relief image, Longitudinal Gradient of Mag (NAD83, 30.0 Mb zip'd) |
Colour, shaded relief image, Digital Terrain Model (NAD83, 36.3 Mb zip'd) |
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