Table Of Contents
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__________________________________________________________________ |
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| Identification Information |
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| Citation Information |
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Title: |
DP ME 5, Version 2, 2006, Airborne Gamma Ray Spectrometric Survey Images, Elemental and Elemental Ratio Images Covering 11D, 11E, 11F, 11G, 11J, 11K, 11N, 20O, 20P, 21A, 21B and 21H, (250 m x 250 m resolution)
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Originator: |
Nova Scotia Department of Natural Resources, Mineral Resources Branch |
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Publication Date: |
August 2006 |
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Edition: |
2 |
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Data Type: |
remote-sensing image |
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Series: |
Digital Product |
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Issue Identification: |
DP ME 5 |
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Publisher: |
Nova Scotia Department of Natural Resources, Mineral Resources Branch |
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Publication Place: |
Halifax, Nova Scotia, Canada |
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Online linkage: |
http://www.gov.ns.ca/natr/meb/download/dp005.asp |
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| Data Description |
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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 gamma ray surveys exist over Nova Scotia. Twelve of the TIFF images represent the radioelements for the entire province, while the other twelve represent the ratios of the radioelements values. The original data were collected by aeromagnetic surveys flown by the Geological Survey of Canada (GSC).
rd_250_xxx.tif Series:
Band 1: %K - Potassium
Band 2: eU - equivalent Uranium
Band 3: eTh - equivalent Thorium
rr_250_xxxx.tif Series:
Band 1: eU/%K - equivalent Uranium/Potassium
Band 2: eTh/%K - equivalent Thorium/Potassium
Band 3: eU/eTh - equivalent Uranium/equivalent Thorium
These are the .tiff images showing ratios of radiometrics values for the entire province. |
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Purpose: |
The TIFFs are to be used as a backdrop behind other geological layers to assist with geological intepretations. |
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Supplemental Information: |
Dataset ID = i005nsaa;
Data Class = radiomet;
Project ID = RFP1994 |
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Language |
English |
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Data Credit: |
Nova Scotia Department of Natural Resources |
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Data Environment |
ArcInfo 8.3 on a SUN Sparc 20 workstation running Solaris 7 |
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Native Data Set Format |
TIFF image |
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| Contact Information |
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Brian Fisher |
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Nova Scotia Department of Natural Resources, Mineral Resources Branch |
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Digital Information Services Supervisor |
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1701 Hollis Street, P.O. Box 698 |
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Halifax, Nova Scotia, Canada |
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B3J 2T9 |
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(phone)
(902)-424-6660 |
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(fax)
(902)-424-7735 |
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befisher@gov.ns.ca |
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Available:
9:00 a.m. to 5:00 p.m. AST Monday - Friday |
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| Time Period Information |
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Beginning Date: |
1994 |
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Ending Date: |
1997 |
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Currentness Reference: |
publication date |
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| Data Status |
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Progress: |
Complete |
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Update Frequency: |
As needed |
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| Spatial Domain |
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West Coordinate: |
-66.50 |
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East Coordinate: |
-59.50 |
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North Coordinate: |
47.25 |
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South Coordinate: |
43.25 |
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| Keywords |
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Theme Keywords: |
Environmental protection; Geology; Geophysics; Natural resources; Physics; Remote Sensing; regional geology; computer applications; gamma-ray surveys, airborne; gamma-ray spectroscopy; spectrometric survey images; geoscientific Information; Downloadable Data; Gamma Ray (GAM); Geologic & Geophysical; Geophysics (GP); GAM Images; radiometric survey; Digital Products; Digital Geoscience Data; Digital Images |
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Place Keywords: |
Nova Scotia; 11C; 11D; 11E; 11F; 11G; 11J; 11K; 11N; 20O; 20P; 21A; 21B; 21H |
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| Access and Usage Information |
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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 DNR
and the recipient of the data hereinafter called the USER
For good consideration, the receipt of which is acknowledged, DNR licences the non-exclusive use of the digital DATA to the USER on the following terms and conditions.
TERMS AND CONDITIONS
DNR remains the owner of the DATA and is not assigning copyright privileges to the USER.
The USER agrees to acknowledge DNR 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.
DNR 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.
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.
This Licence is the entire Agreement between the parties and supersedes all previous Agreements or understandings between DNR 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 DNR 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. |
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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. |
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| Browse Graphic Information |
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Filename: |
none |
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Description: |
none at this time |
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| Security Information |
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Classification System: |
none |
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Classification: |
Unclassified |
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Handling Description: |
none |
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__________________________________________________________________ |
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| Data Quality Information |
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| Positional Accuracy |
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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 NRCan/GSC/Geophysics Division in 16 bit signed integer raster grid format and have been linearly compressed from 16 bit to 8 bit file formats. The grid cells were resampled to a resolution of 250 metres by 250 metres and then contrast enhanced using a non-linear enhancement technique to facilitate visual appearance and interpretation. Consequently, the original digital values have been significantly altered. Quantitative analysis using this data is possible, however, if actual values are required the original data should be used. "non-linear enhancement 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 values 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. "significantly altered" means that the data values within the grid cells have been appreciably changed from the original values and the process is irreversible. In this method, returning to the original data values is impossible. Scaling data from 16 bit data range to 8 bit data range is a method of compression. For example, take an input sample of grid values of 457-496, these may be scaled to the value of 128 in the output grid (depending on the modelled in scaling). Returning to the original values is impossible because there is no method of retaining which of the (128 value) cells had an original value of 461 or 483. "qualitative analysis" is possible with these image files. Image files represent a two dimensional array of data values. Images may be classified or grouped according to a set of training areas which define distinct class parameters. However, if these techniques are performed on imagery or grids which contain altered or enhanced data values, then the clusters or classes will be correspondingly altered relative to the same procedure applied to the original, non-altered data. 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. |
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Horizontal Accuracy Value: |
Absolute accuracy= +/- 750 m |
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| Processing Step Information |
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| Processing Step (1 of 6) |
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Description: |
Since 1976, the Geological Survey of Canada has been systematically collecting high sensitivity airborne gamma ray survey data for the Province of Nova Scotia. Between 1976 and 1990, complete coverage of the province was acquired as either reconnaissance (5000 m flight line spacing) or as detailed surveys (1000 m flight line spacing). Currently, all of the province has been covered at a flight line spacing of 1000 m (see table 1- D:\Nsgov\Nsgov\gamma2.htm). The survey data was acquired along north-south or east-west flight lines using a 50 l sodium iodide detector system at an altitude of approximately 120 metres at a ground speed of 190 km/hr. Table 1 provides information about GSC Airborne Gamma Ray Surveys available for the province at 1000 m and 250 m flight line spacings.
Survey data acquired at a flight line of 5 km have been averaged and interpolated to a 500 by 500 metre grid cell raster. Alternately, data acquired using a flight line spacing of 1 km have been averaged and interpolated to a 250 by 250 metre grid cell raster. The GSC releases Air Absorbed Dose Rate, Ternary Radioelement Map, equivalent Uranium (eU), equivalent Thorium (eTh), Potassium (K), as well as the ratios eU/K, eTh/K, eU/eTh.
The sodium iodide detector provides a measurement of the three most abundant naturally occurring radioactive elements, potassium, uranium and thorium. Potassium is measured directly from the 1.46 MeV gamma ray photons emitted by 40K, whereas uranium and thorium are measured indirectly from gamma ray photons emitted by daughter products in their decay chains. Uranium is monitored by means of gamma ray photons at approximately 1.46 MeV from 214Bi, and thorium, from 2.6c MeV photons emitted by 208Tl. Corrections have been applied to account for dead time, ambient temperature changes, background radiation, spectral scattering and deviations of terrain clearance from the planned survey altitude.
A regional Airborne Gamma Ray Data Set covering the entire province has been created by the GSC. This data set was generated by merging the individual surveys and processing the data to remove levelling errors during the surveys and matched along survey boundaries. The data have been georeferenced by GSC in a NAD27 datum and projected into a UTM zone 20 grid. |
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Date: |
1976-1990 |
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Contact Person: |
(see Contact Information)
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| Processing Step (2 of 6) |
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Description: |
As part of the NSDNR RFP 1994-001148 Synmap Information Technologies acquired the data from the Geophysical Data Centre NRCan/GSC/Geophysics Division in 16 bit signed integer raster grid format and have been linearly compressed from 16 bit to 8 bit file formats. The grid cells were resampled to a resolution of 250 metres by 250 metres and then contrast enhanced using a non-linear enhancement technique to facilitate visual appearance and interpretation. Consequently, the original digital values have been significantly altered. Quantitative analysis using these data is possible, however, if actual values are required the original data should be used. The data products provided to the NSDNR-MRB have been converted from the original format to a TIFF raster file format. |
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Date: |
1994 |
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Contact Person: |
(see Contact Information)
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| Processing Step (3 of 6) |
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Description: |
In 1997, Natural Resources released version 1 of digital product DP 005. |
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Date: |
1997 |
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Contact Person: |
(see Contact Information)
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| Processing Step (4 of 6) |
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Description: |
In January 2006 the data set was renamed from GAMMARAY to I005NSAA and moved from the IMAGE directory on the MRB "S" drive to the RADIOMET directory. This work was done by Brian Fisher. |
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Software and Version: |
ArcView 3.2a |
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Date: |
January 2006 |
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Contact Person: |
(see Contact Information)
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| Processing Step (5 of 6) |
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Description: |
In January 2006 the .TIF images were converted from UTM zone 20 NAD27 coordinates to UTM zone 20 NAD83 coordinates. This was done by Angie Ehler running the AML file - Tif27to83.aml. The images were renamed at the same time. The RADxxx.TIF image series were renamed to RD_250_xxx.TIF and the RADRxxx.TIF series was renamed to RR_250_xxx.TIF, where xxx stands for the 1:250 000 NTS sheet name. |
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Software and Version: |
ArcInfo 9.1 |
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Date: |
Jauary 2006 |
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Contact Person: |
(see Contact Information)
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| Processing Step (6 of 6) |
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Description: |
Digital Product DP ME 5, Version 2, was released for free download from the MRB website in August 2006. |
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Software and Version: |
ArcInfo 9.1 |
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Date: |
August 2006 |
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Contact Person: |
(see Contact Information)
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__________________________________________________________________ |
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| Spatial Data Organization Information |
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Spatial Reference Method: |
Raster |
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Raster Type: |
Pixel |
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Display Type: |
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Row Count: |
1 |
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Raster Origin: |
upper left |
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Number of Bands: |
3 |
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Cell Size X Direction: |
250.000000 |
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Cell Size X Units: |
meters |
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Cell Size Y Direction: |
250.000000 |
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Cell Size Y Units: |
meters |
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Bits Per Pixel: |
8 |
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Image Format: |
TIFF |
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Image Colormap: |
False |
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Compression Type: |
none |
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__________________________________________________________________ |
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| Spatial Reference Information |
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Data Projection: |
Universal Transverse Mercator |
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Zone: |
20
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Scale Factor at Central Meridian: |
0.9996
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Longitude at Central Meridian: |
-63.0
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Latitude of Projection Origin: |
0
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False Easting: |
500000
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False Northing: |
0
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Geographic Coordinate System: |
GSC_North_American_1983
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Projected Coordinate System: |
NAD_1983_UTM_Zone_20N
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Datum: |
North American Datum of 1983
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Ellipsoid: |
Geodetic Reference System 80
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Semi-Major Axis: |
6378137
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Denominator Of Flattening Axis: |
298.257222
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__________________________________________________________________ |
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| Entity Attribute Information |
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| Overview Description |
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Dataset Overview: |
Data set consists of 24 color TIFF files and associated .TFW files that are used to georeference the TIFF images. |
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| Detailed Description |
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| Data Layer/Table (1 of 24) |
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Table Name: |
rd_250_11d.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11D |
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| Data Layer/Table (2 of 24) |
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Table Name: |
rd_250_11e.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11E |
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| Data Layer/Table (3 of 24) |
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Table Name: |
rd_250_11f.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11F |
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| Data Layer/Table (4 of 24) |
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Table Name: |
rd_250_11g.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11G |
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| Data Layer/Table (5 of 24) |
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Table Name: |
rd_250_11j.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11J |
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| Data Layer/Table (6 of 24) |
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Table Name: |
rd_250_11k.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11K |
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| Data Layer/Table (7 of 24) |
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Table Name: |
rd_250_11n.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 11N |
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| Data Layer/Table (8 of 24) |
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Table Name: |
rd_250_20o.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 20O |
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| Data Layer/Table (9 of 24) |
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Table Name: |
rd_250_20p.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 20P |
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| Data Layer/Table (10 of 24) |
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Table Name: |
rd_250_21a.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 21A |
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| Data Layer/Table (11 of 24) |
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Table Name: |
rd_250_21b.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 21B |
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| Data Layer/Table (12 of 24) |
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Table Name: |
rd_250_21h.tif |
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Description: |
Tiff image showing radiometrics based on NTS 1:250 000 map sheet 21H |
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| Data Layer/Table (13 of 24) |
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Table Name: |
rr_250_11d.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11D |
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| Data Layer/Table (14 of 24) |
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Table Name: |
rr_250_11e.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11E |
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| Data Layer/Table (15 of 24) |
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Table Name: |
rr_250_11f.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11F |
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| Data Layer/Table (16 of 24) |
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Table Name: |
rr_250_11g.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11G |
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| Data Layer/Table (17 of 24) |
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Table Name: |
rr_250_11j.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11J |
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| Data Layer/Table (18 of 24) |
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Table Name: |
rr_250_11k.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11K |
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| Data Layer/Table (19 of 24) |
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Table Name: |
rr_250_11n.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 11N |
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| Data Layer/Table (20 of 24) |
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Table Name: |
rr_250_20o.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 20O |
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| Data Layer/Table (21 of 24) |
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Table Name: |
rr_250_20p.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 20P |
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| Data Layer/Table (22 of 24) |
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Table Name: |
rr_250_21a.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 21A |
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| Data Layer/Table (23 of 24) |
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Table Name: |
rr_250_21b.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 21B |
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| Data Layer/Table (24 of 24) |
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Table Name: |
rr_250_21h.tif |
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Description: |
Tiff image showing ratio of radiometrics based on NTS 1:250 000 map sheet 21H |
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__________________________________________________________________ |
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| Distribution Information |
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Description: |
Dwonloadable Data |
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Digital Custom Order Process: |
Digital Product Number = DP ME 5 |
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Available: |
since August 2006 |
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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.
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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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). |
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Ordering Fee: |
Free |
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Instructions: |
The data set can be downloaded over the Internet. |
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Distribution Contact: |
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see contact information |
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| Digital Form: (1 of 2) |
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format name: |
TIFF |
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format specification: |
dp005v2_rd_tf.exe |
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Transfer Size: |
2.6 MB |
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Dataset Size: |
6.7 MB |
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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 radiometrics. Each imaged is provided with a copy of an ArcView TFW world file. |
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Decompression Technique: |
self extracting DOS based pkzip archive file |
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Online Transfer: |
http://www.gov.ns.ca/natr/meb/download/dp005.asp |
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| Digital Form: (2 of 2) |
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format name: |
TIFF |
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format specification: |
dp005v2_rr_tf.exe |
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Transfer Size: |
2.2 MB |
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Dataset Size: |
6.7 MB |
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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 ratio of radiometrics. Each imaged is provided with a copy of an ArcView TFW world file |
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Decompression Technique: |
self extracting DOS based pkzip archive file |
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Online Transfer: |
http://www.gov.ns.ca/natr/meb/download/dp005.asp |
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__________________________________________________________________ |
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| Metadata Reference |
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Creation Date: |
20060803 |
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Metadata Standard: |
FGDC Content Standards for Digital Geospatial Metadata |
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Standard Version: |
FGDC-STD-001-1998 |
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Metadata Language: |
English |
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Time Convention: |
local time |
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Review Date: |
As required |
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Access Constraints: |
none |
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User Constraints: |
none |
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Security Classification System: |
none |
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Security Classification: |
Unclassified |
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Security Handling Description: |
none |
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Metadata Contact: |
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see contact information |
