Airborne Magnetometer Survey Images

DP ME 6, Version 2, 2006. Airborne Magnetometer Survey Images, Total Field and Vertical Gradient Images Covering 11D, 11E, 11F, 11G, 11J, 11K, 11N, 20O, 20P, 21A, 21B and 21H, (200 m X 200 m Resolution)

Table Of Contents
 
 
Identification Information
 
Citation Information
  Title: DP ME 6, Version 2, 2006. Airborne Magnetometer Survey Images, Total Field and Vertical Gradient Images Covering 11D, 11E, 11F, 11G, 11J, 11K, 11N, 20O, 20P, 21A, 21B and 21H, (200 m X 200 m Resolution).
  Originator: Nova Scotia Department of Natural Resources, Mineral Resources Branch
  Publication Date: August 2006
  Edition: Version 2
  Data Type: remote-sensing image
  Series: Digital Product
  Issue Identification: DP ME 6
  Publisher: Nova Scotia Department of Natural Resources, Mineral Resources Branch
  Publication Place: Halifax, Nova Scotia, Canada
  Online linkage: https://novascotia.ca/natr/meb/download/dp006.asp
 
Data Description
  Abstract: This data set consists of 24 color TIFF images with a resolution of 200 m X 200 m covering 12 1:250 000 NTS mapsheets, where airborne magnetometer surveys exist over Nova Scotia. Twelve of the TIFF images represent the total field aeromagnetics for the entire province, while the other twelve represent the vertical gradient aeromagnetics. Each of the 24 images also comes with an ESRI world file (.tfw) that is used by the Arc suite of products to georeference the image. The original data were collected by aeromagnetic surveys flown by the Geological Survey of Canada (GSC).
  Purpose: The TIFFs are to be used as a backdrop behind other geological layers to assist with geological interpretations.
  Supplemental Information: Data Set ID = m006nsam; Data Class = magnetic; Project ID = RFP1994; old dataset ID = aeromag; old data class = images
  Language English
  Data Credit: Nova Scotia Department of Natural Resources
  Data Environment ArcInfo 8.2 on a SUN Sparc 20 workstation running Solaris 7
  Native Data Set Format TIFF image
 
Contact Information
 
 Jeff Poole
  Nova Scotia Department of Natural Resources, Mineral Resources Branch
  Digital Information Services Supervisor
  1701 Hollis Street, P.O. Box 698
  Halifax, Nova Scotia, Canada
  B3J 2T9
  (phone) 902-424-8139
  (fax) 902-424-7735
  Staff Contact
  Available: 9:00 a.m. to 5:00 p.m. AST Monday - Friday
 
Time Period Information
  Beginning Date: 1994
  Ending Date: 1997
  Currentness Reference: publication date
 
Data Status
  Progress: Complete
  Update Frequency: As needed
 
Spatial Domain
  West Coordinate: -66.5
  East Coordinate: -59.5
  North Coordinate: 47.25
  South Coordinate: 43.25
 
 
Keywords
  Theme Keywords: Geology; Geophysics; Physics; Remote Sensing; GeoscientificInformation; regional geology; magnetic surveys, airborne; computer applications; vertical gradient surveys, airborne; magnetometers; Downloadable Data; Magnetic (MAG); 11C; 11D; 11E; 11F; 11G; 11J; 11K; 11N; 20O; 20P; 21A; 21B; 21H; Geologic & Geophysical; Geophysics (GP); MAG Images; digital products; digital geoscience data; digital images
  Place Keywords: Nova Scotia
 
Access and Usage Information
  Access Constraints:

The access constraints are contained in the following License Agreement which the user must agree to before using the data. A copy of the License Agreement is included with the digital product. The License Agreement reads as follows:

"For the data contained on this medium (media), or any part thereof, herein called the DATA

Between the PROVINCE OF NOVA SCOTIA as represented by the Nova Scotia Department of Natural Resources, hereinafter referred to as NR&R and the recipient of the data hereinafter called the USER

For good consideration, the receipt of which is acknowledged, NR&R licences the non-exclusive use of the digital DATA to the USER on the following terms and conditions.

TERMS AND CONDITIONS

NR&R remains the owner of the DATA and is not assigning copyright privileges to the USER.

The USER agrees to acknowledge NR&R as the source of the DATA, if using or distributing it in its original form, whether in whole or in part, or as part of a value added product.

NR&R reserves the right to modify and/or update the DATA without obligations to notify the USER.

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.

This Licence is the entire Agreement between the parties and supersedes all previous Agreements or understandings between NR&R and the USER hereto, whether written or oral, in connection with or incidental to the DATA. This Licence shall be binding upon the parties hereto and each of their executors, administrators, successors and assigns and shall ensure to the benefit of such executors, administrators, successors and authorized assigns.

This Licence must be included with the DATA if the USER copies, resells, or re-distributes the DATA whether in whole or in part.

This Licence can be terminated by NR&R at any time. Upon such termination, the USER shall refrain from using the DATA and destroy all copies and backups in the USER'S possession.

This Licence is in effect once the USER reads and accepts the Terms and Conditions of this Licence. If the USER is unable or unwilling to fully comply with these terms and conditions, the USER must refrain from using the DATA. By using the DATA, the USER acknowledges that he/she was aware of the terms and conditions of this Licence when he/she accepted it, understood them, and agreed to be bound by them."

A copy of the terms and conditions of the license are available with the downloaded product.
  Use Constraints: Any constraints on the use of the data are contained in the above license agreement. The terms and conditions of the license accompany the downloaded digital product. A statement of some use constraints can be viewed in the technical prerequisites.
 
Browse Graphic Information
  Filename: none
  Description: none at this time
 
Security Information
  Classification System: none
  Classification: Unclassified
  Handling Description: none
 
Data Quality Information
 
Positional Accuracy
  Positional Accuracy Report: There may be positional accuracy errors in the data that came from the original data collection. The survey data was acquired from the Geophysical Data Centre, GSC, Ottawa in 16 bit signed integer raster grid format. The data were then linearly compressed to 8 bit file formats and geo-referenced to the NSGC 1:500 000 planimetric base map for Nova Scotia. Subsequently these data were contrast enhanced using a non-linear technique to facilitate visual appearance and interpretation. Quantitative image analysis using these data is possible, however accurate quantitative data analysis requires the original 16 bit values, which are available from the Geophysical Data Center, Ottawa. "non-linear technique to facilitate visual appearance and interpretation" means to permanently alter data values within a grid so that a narrow range of grid cell values represent the data over a wider range of values. In this case 'non-linear' refers to the mathematical model used in controlling the input and output data value ranges. Once this operation is performed on a grid it is irreversible and returning to the original data values is impossible unless the exact input parameters and mathematical modelling equation is known. 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 from it.
  Horizontal Accuracy Value: Absolute accuracy = +/- 600m
 
Source Information
 
Source (1 of 2)
  Originator: Warner Miles
  Publication Place: Ottawa, Ontario, Canada
  Publisher: Geological Survey of Canada
 
Source (2 of 2)
  Title: NTS Digital 1:500 000 Topographic Maps
  Originator: Nova Scotia Geomatics Center
  Data Form: vector digital data
  Series Name: Digital Bases
  Issue Identification: NTS Digital 1:500 000 Topographic Maps
  Publication Place: Amherst, Nova Scotia, Canada
  Publisher: Nova Scotia Geomatics Center
  Scale Denominator: 500000
  Source Media: disc
  Citation Abbreviation: NSGC
  Source Contribution: The digital 1:500 000 NTS base data was used to georeference the image data
  Currentness Reference: ground condition
  Currentness Date: unknown
 
Processing Step Information
 
Processing Step (1 of 6)
  Description: Total field airborne magnetometer data have been systematically acquired for the province of Nova Scotia. A combination of GSC in-house surveys and external contract surveys and external surveys through various Federal/Provincial Programs have resulted in complete coverage of the province. In total 15 surveys have been flown ranging in date from the 1950's to 1990. The data from these surveys vary with respect to instrumentation, flight parameters (altitude, line spacing, digital/analogue recording, noise levels) and processing. Tables 1 and 2 provide information on digitally acquired data for the period 1970 to 1990. Tables 1 and 2 are provided as an html page at,A,Prior to 1970, all acquisition was analogue-based; contour maps were later digitized along flight path lines to generate digital profile data. A regional aeromagnetic dataset covering the entire province has been created by the GSC by merging the individual surveys. The data have been levelled to a common datum, ensuring a match along coincident boundaries and referenced to the Definitive Geomagnetic Reference Field (DGRF). They are available from the GSC, as either grid or profile data. Two tables are provided with the metadata in a file called gsc_surveys.wpd Table 1. Description of data coverage from GSC in-house aeromagnetic surveys Table 2. Description of data coverage from Federal/Provincial contract survey programs.
  Software and Version: Unknown
  Date: 1950-1990
  Contact Person: (see Contact Information)
 
Processing Step (2 of 6)
  Description: As part of the NSNR&R RFP 1994-001148 Synmap Information Technologies acquired the survey data from the Geophysical Data Centre, GSC, Ottawa in 16 bit signed integer raster grid format. The data was then linearly compressed to 8 bit file formats and georeferenced to the NSGC 1:500 000 planimetric base map for Nova Scotia. Subsequently these data were contrast enhanced using a non-linear technique to facilitate visual appearance and interpretation. Quantitative image analysis using these data is possible, however accurate quantitative data analysis requires the original 16 bit values, which are available from the Geophysical Data Center. The data products have been converted from the original format to a TIFF raster file format that is compatible with ESRI's ArcInfo GIS. Footnotes: "non-linear technique to facilitate visual appearance and interpretation" means to permanently alter data values within a grid so that a narrow range of grid cell values represent the data over a wider range of values. In this case 'non-linear' refers to the mathematical model used in controlling the input and output data value ranges. Once this operation is performed on a grid it is irreversible and returning to the original data values is impossible unless the exact input parameters and mathematical modelling equation are known.
  Software and Version: Unknown
  Date: 1994
  Contact Person: (see Contact Information)
 
Processing Step (3 of 6)
  Description: In 1997, Natural Resources released version 1 of digital product DP 006.
  Software and Version: None
  Date: 1997
  Contact Person: (see Contact Information)
 
Processing Step (4 of 6)
  Description: In January 2006 the data set was renamed from AEROMAG to M006NSAM and moved from the IMAGE directory on the MRB "S" drive to the MAGNETIC directory. This work was done by Brian Fisher.
  Software and Version: ArcView 3.2a
  Date: January 2006
  Contact Person: (see Contact Information)
 
Processing Step (5 of 6)
  Description: The images were renamed in January 2006. The NSTFxxx.TIF image series were renamed to TF_200_xxx.TIF and the NSVGxxx.TIF series was renamed to VG_200_xxx.TIF, where xxx stands for the 1:250 000 NTS sheet name. The images were also re-projected from UTM zone 20 NAD27 to UTM zone 20 NAD83 using an AML for re-projecting single band images. This work was done by Angie Ehler.
  Software and Version: ArcInfo 9.1
  Date: January 2006
  Contact Person: (see Contact Information)
 
Processing Step (6 of 6)
  Description: The new images were released as digital product DP ME 6 version 2 in August 2006.
  Software and Version: not applicable
  Date: August 2006
  Contact Person: (see Contact Information)
 
Spatial Data Organization Information
 
  Spatial Reference Method: Raster
  Raster Type:
  Display Type:  
  Row Count:
  Raster Origin:
  Number of Bands:
  Cell Size X Direction:
  Cell Size X Units:
  Cell Size Y Direction:
  Cell Size Y Units:
  Bits Per Pixel:
  Image Format:
  Image Colormap:
  Compression Type:
 
Spatial Reference Information
 
  Data Projection: Universal Transverse Mercator
  Zone: 20
  Scale Factor at Central Meridian: 0.9996
  Longitude at Central Meridian: -63.0
  Latitude of Projection Origin: 0
  False Easting: 500000
  False Northing: 0
  Geographic Coordinate System: GSC_North_American_1983
  Projected Coordinate System: NAD_1983_UTM_Zone_20N
  Datum: North American Datum of 1983
  Ellipsoid: Geodetic Reference System 80
  Semi-Major Axis: 6378137
  Denominator Of Flattening Axis: 298.257222
 
 
Entity Attribute Information
 
 
Overview Description
  Dataset Overview: Data set consists of 24 color TIFF files and their associted ArcView TFW files.
 
Detailed Description
 
Data Layer/Table (1 of 24)
  Table Name: tf_200_11d.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11D
 
Data Layer/Table (2 of 24)
  Table Name: tf_200_11e.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11E
 
Data Layer/Table (3 of 24)
  Table Name: tf_200_11f.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11F
 
Data Layer/Table (4 of 24)
  Table Name: tf_200_11g.HTM
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11G
 
Data Layer/Table (5 of 24)
  Table Name: tf_200_11j.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11J
 
Data Layer/Table (6 of 24)
  Table Name: tf_200_11k.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11K
 
Data Layer/Table (7 of 24)
  Table Name: tf_200_11n.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 11N
 
Data Layer/Table (8 of 24)
  Table Name: tf_200_20o.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 20O
 
Data Layer/Table (9 of 24)
  Table Name: tf_200_20p.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 20P
 
Data Layer/Table (10 of 24)
  Table Name: tf_200_21a.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 21A
 
Data Layer/Table (11 of 24)
  Table Name: tf_200_21b.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 21B
 
Data Layer/Table (12 of 24)
  Table Name: tf_200_21h.tif
  Description: Tiff image showing total field aeromagnetics for NTS 1:250 000 map sheet 21H
 
Data Layer/Table (13 of 24)
  Table Name: vg_200_11d.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11D
 
Data Layer/Table (14 of 24)
  Table Name: vg_200_11e.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11E
 
Data Layer/Table (15 of 24)
  Table Name: vg_200_11f.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11F
 
Data Layer/Table (16 of 24)
  Table Name: vg_200_11g.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11G
 
Data Layer/Table (17 of 24)
  Table Name: vg_200_11j.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11J
 
Data Layer/Table (18 of 24)
  Table Name: vg_200_11k.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11K
 
Data Layer/Table (19 of 24)
  Table Name: vg_200_11n.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 11N
 
Data Layer/Table (20 of 24)
  Table Name: vg_200_20o.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 20O
 
Data Layer/Table (21 of 24)
  Table Name: vg_200_20p.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 20P
 
Data Layer/Table (22 of 24)
  Table Name: vg_200_21a.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 21A
 
Data Layer/Table (23 of 24)
  Table Name: vg_200_21b.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 21B
 
Data Layer/Table (24 of 24)
  Table Name: vg_200_11h.tif
  Description: Tiff image showing vertical gradient aeromagnetics for NTS 1:250 000 map sheet 21H
 
Distribution Information
 
  Description: Downloadable Data
  Digital Custom Order Process: Digital Product Number = DP ME 6
  Available: since August 2006
  Liability: 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.
  Technical Prerequisite: In order to view our digital files on your computer, you require mapping software (e. g. ArcView(R), MapInfo(R), AutoCAD(R)). If you do not have this software, ESRI* provides a FREE Map Viewer called ArcExplorer(R) which you can download over the Internet. ArcExplorer(R) works with our "E00" and "TIFF" files. You need to download both ArcExplorer(R) and the ArcExplorer(R) Import Utility (Import71.exe). The import utility is required to convert the ArcInfo "E00" files into ArcInfo coverages, which then can be viewed in ArcExplorer(R).
  Ordering Fee: Free
  Instructions: The data set can be downloaded over the Internet.
  Distribution Contact:
  see contact information
 
Digital Form: (1 of 2)
  format name: TIFF
  format specification: dp006v2_tf_tf.exe
  Transfer Size: 2.6 MB
  Dataset Size: 4.1 MB
  Information Content: TIFF images for Nova Scotia divided into several images based on the NTS 1:250 000 map sheets. The image for each map sheet is further divided into TIFF images for total field aeromagnetics. Also included is an ESRI world file (.tfw) used to georeference the image.
  Decompression Technique: self extracting DOS based pkzip archive file
  Online Transfer: https://novascotia.ca/natr/meb/download/dp006.asp
 
Digital Form: (2 of 2)
  format name: TIFF
  format specification: dp006v2_vg_tf.exe
  Transfer Size: 2.2 MB
  Dataset Size: 4.1 MB
  Information Content: TIFF images for Nova Scotia divided into several images based on the NTS 1:250 000 map sheets. The image for each map sheet is further divided into TIFF images for vertical gradient aeromagnetics. Also included is an ESRI world file (.tfw) used to georeference the image.
  Decompression Technique: self extracting DOS based pkzip archive file
  Online Transfer: https://novascotia.ca/natr/meb/download/dp006.asp
 
Metadata Reference
 
  Creation Date: 20060803
  Metadata Standard: FGDC Content Standards for Digital Geospatial Metadata
  Standard Version: FGDC-STD-001-1998
  Metadata Language: English
  Time Convention: local time
  Review Date: As required
  Access Constraints: none
  User Constraints: none
  Security Classification System: none
  Security Classification: Unclassified
  Security Handling Description: none
  Metadata Contact:
  see contact information
  1701 Hollis Street, P.O. Box 698
  Halifax, Nova Scotia, Canada
  B3J 2T9