VLF-EM Images for the Cobequid Highlands, Nova Scotia
DP ME 113, Version 2, 2006, Airborne VLF-EM
Orthogonal Total Field Images collectively covering parts
of NTS sheets 11E/05, 11E/06, 11E/07, 11E/10, 11E/11, 11E/12,
21H/07, 21H/08, 21H/09 and 21H/10, TGI-2 project, Cobequid
Highlands, Nova Scotia, by M. S. King, 2004. Available in
TIFF and JPEG formats, and also as PDF's of OFM ME 2005-92
to 100.
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This data set consists of one
TIFF image, one JPEG image, and 9 PDF Open File Maps of airborne VLF-EM ortho total field data
covering most of the Cobequid Highlands in northern Nova Scotia
and part of the TGI-2 project area.
Airborne geophysical data used to generate these images were supplied
by the Geological Survey of Canada (GSC) - Geophysical Data Centre,
615 Booth St., Ottawa, Ontario, K1A 0E9. This high-resolution
VLF-EM data was digitally acquired as part of the Parrsboro Survey (GSC
Project #189). The data used to produce this image is the de-corrugated
measured total field response using the "Orthogonal" transmitter.
The "Orthogonal" transmitter for GSC Project #189 is Cutler, Maine. Total
field VLF-EM data provide a measure of the internal electrical character
(i. e. resistivity/conductivity) of the underlying Quaternary and bedrock
geology. VLF-EM data is not processed to the same levels as the associated
magnetic data channel and are also subject to different artefacts and biases.
For a more complete description please refer to King (2003 and 2004).
The 24-bit colour images were produced with a 25m pixel size. Shading was from the
south at 35 degrees above the horizon. For complete details
an Open File Report will be forthcoming from M. S. King later
in 2004.
The images were produced by contractor M. S. King using funds
provided under the Natural Resources Canada and Nova Scotia Department
of Natural Resources joint project 'Mapping, Mineral and Energy
Resource Evaluation, Central Nova Scotia', part of Natural Resources
Canada's Targeted Geoscience Initiative (TGI-2) 2003-2005. |
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The information on the PDF map comes from a variety of government and non-government
sources. NSDNR accepts no liability for any errors or deficiencies on this map.
This map should not be used for legal purposes.
The PDF map is intended for use at the published scale of 1:50 000.
The DATA is provided to the USER on an "as is" basis, without warranties of any kind, express
or implied. The entire risk as to the quality and accuracy of the DATA is with the USER and the USER shall
use his/her own judgment in making use of the DATA or drawing conclusions based upon it. DNR shall not be
liable to the USER, his/her clients, servants, agents, contractors, assigns, or to any other person for any
loss or damage of any kind including personal injury or death arising from the use of the DATA or
accompanying written materials, or from errors, deficiencies or faults therein, whether such damage is
caused by negligence or otherwise. If errors or omissions are found in the DATA, the USER will notify DNR.
The terms and conditions of the license accompany the downloaded digital product.
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A Sample VLF-EM Image
(Sample image - Click to view details in a smaller area)
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| Format |
Portable Document Format (PDF), Tag Image File Format (TIFF),
Joint Photographic Experts Group (JPEG) and TXT files compressed
in self-extracting EXE/ZIP files (more information on
data formats) |
| Size |
PDF - 2.6 to 7.2 Mb (compressed), 2.8 to 8.1 MB (uncompressed)
TIFF - 8.9 MB (compressed), 34.0 MB (uncompressed)
JPEG - 2.2 MB (compressed), 2.3 MB (uncompressed) |
| Projection |
The TIFF and JPEG images, are in six-degree Universal
Transverse Mercator (UTM) projection, Zone 20, Central
Meridian 63° 00' West using the North American Datum
of 1983 (NAD83).
The PDF maps are are in six-degree Universal Transverse Mercator
(UTM) projection, Zone 20, Central Meridian 63° 00'
West using the North American Datum of 1927 (NAD27). |
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Downloading Instructions
The data files have been compressed using PKZIP into a single, self-extracting EXE file.
- Read the Licence before accepting the
data.
- Download the self-extracting EXE file to the desired location on your hard
drive.
- Double click or "RUN" the EXE file and the data files will be unzipped automatically.
The EXE file can also be opened in WinZip to view and extract the compressed
files in the data set.
On UNIX platforms, the unzip command will extract the compressed files in the EXE.
A readme file and a copy of the licence agreement are also included
with each data set. |
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