Airborne Magnetic Images for Northern Mainland Nova Scotia
DP ME 97, Version 2, 2006, Airborne Magnetic
Total Field, Calculated First Vertical Derivative and Calculated
Second Vertical Derivative Images collectively covering NTS
sheets 11E/05, 11E/06, 11E/07, 11E/08, 11E/09, 11E/10, 11E/11,
11E/12, 11E/13, 11E/14, 11E/15, 11E/16, 11F/05, 11F/12, 11F/13,
21H/07, 21H/08, 21H/09, 21H/10 and 21H/16, TGI-2 project,
northern mainland Nova Scotia, by M. S. King, 2004. Available
in TIFF and JPEG formats, and also PDF's of OFM ME 2005-21
to 59 for First and Second Vertical Derivative.
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Disclaimer
Sample
Format and Projection
Data Format Technical Notes
Metadata
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DP ME 117
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This data set consists of one
TIFF, one JPEG image, and one PDF map of airborne magnetic total field, calculated
first vertical derivative and calculated second vertical derivative
covering most of northern mainland Nova Scotia. Also included in this
data set is 20 PDF maps of calculated first vertical derivative for each
of the 1:50 000 NTS Mapsheets in northern mainland Nova Scotia, and 16
PDF maps of calculated second vertical derivative for each of the mapsheets
excluding: 21H/16, 11E/13, 11E/14 and 11E/15.
The data used to generate these images and maps were supplied by
the Geological Survey of Canada - Geophysical Data Centre, 615 Booth
St., Ottawa, Ontario, K1A 0E9, and the Radiation Geophysics Division,
601 Booth St., Ottawa, Ontario, K1A 0E8. The original magnetic data
were acquired as part of: Project #102 "Antigonish Survey", Project
#127 "Guysborough Survey", Project #184 "Musquodoboit Survey", Project
#189 "Parrsboro Survey" and Project #152 "St. Mary's River Survey".
Map coverage was locally augmented by older vintage GSC analogue
data. The MAGNETIC TOTAL FIELD images (and other subsequent images)
were derived from the levelled and decorrugated measured magnetic
total field. The ENHANCED MAGNETIC DATA (First and Second Vertical
Derivative) images enhance near-surface magnetic sources at the
expense of deeper features, with the Second Vertical Derivative
data representing more shallow (< 500m depth) sources. Zero value
gradient contours also correlate closely with the vertical projection
of magnetic contacts.The 24-bit colour images were produced with
a 25 m pixel size. Shading was from the south at 35° 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 Aeromagnetics Image (First Derivative)
(Sample image - Click to view details in a smaller area)
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Format and Projection
| 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 - 1.0 to 14.5 MB (compressed), 1.1 to 15.9 MB (uncompressed)
TIFF - 15.2 to 35.6 MB (compressed), 89.7 to 136.8 MB
(uncompressed)
JPEG - 4.6 to 9.3 MB (compressed), 4.7 to 9.4 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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Download DP ME 97 |
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