Gravity Images for Northern Mainland Nova Scotia by 1:50 000 NTS Mapsheet
DP ME 118, Version 2, 2006. Bouguer Gravity and Residual Bouguer Gravity Images for Individual 1:50 000 NTS Sheets 11E/05, 11E/06, 11E/07, 11E/08, 11E/09, 11E/10, 11E/11, 11E/12, 11E/16, 11F/05, 11F/12, 11F/13, 21H/07, 21H/08 and 21H/09, TGI-2 Project, Northern Mainland Nova Scotia
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... DP ME 111
Abstract
This data set consists of 15 TIFF images, 15 JPEG images, and 15 PDF Open File Maps of Bouguer gravity and residual Bouguer gravity for each of 15 1:50 000 NTS sheets that covers most of northern mainland Nova Scotia.
The total field Bouguer gravity and residual Bouguer gravity data used to produce these images were provided by the Nova Scotia Department of Natural Resources 1701 Hollis Street, Halifax, Nova Scotia, B3J 2T9 and extracted by King (OFR-2004). Gravity points include national gravity net stations (5 km station spacing) and more detailed industry and government stations (235 m nominal station spacing). Given that gravity station spacing is variable throughout the NTS sheet there may be related artifacts present in the final gridded product. Regional-residual data separation was completed on the grid product by subtracting a second grid consisting of a 1st or 2nd-order polynomial surface calculated from the original Bouguer gravity total field grid. Residual gravity data consist of shorter wavelength signals (e. g. < 6-10 km) that correspond to more shallow geological sources.
The 24-bit colour images was derived from a 100 m grid product with a 1000 m extrapolation limit and has a 10 m 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.
Disclaimer
The information on the PDF map comes from a variety of government and non-government sources. NSNR&R 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. NR&R 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 NR&R. The terms and conditions of the license accompany the downloaded digital product.
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 - 1.2 MB to 4.6 MB (compressed), 1.4 MB to 5.6 MB (uncompressed)
TIFF - 0.7 MB to 1.5 MB (compressed), 39.5 MB to 48.0 MB (uncompressed)
JPEG - 0.5 MB to 1.0 MB (compressed), 0.6 MB to 1.1 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).
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.