Proactive disclosure
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Natural Resources Canada > Earth Sciences Sector > Priorities > Strong and safe communities > Radiation Geophysics
Radiation Geophysics NATGAM survey coverage
Index map of survey coverage [PDF, 7.5 Mb, viewer]
Survey data are generally classified by the line spacing that was used for
the airborne survey:
Line Spacing
(m) |
Line-kilometres |
Area
(km2) |
Map
Sheets |
Scale |
Description |
| ~25 000 |
36 000 |
??? |
10 |
1:1M |
These surveys were carried out as part of the Uranium
Reconnaissance Program (URP) in the 1970's. The data are
suitable for 1:1M scale. |
| 5000 |
1 200 000 |
??? |
205 |
1:250k |
These surveys were carried out as reconnaissance surveys.
The data are suitable for 1:250k scale. |
| 1000, 2000 & 2500 |
250 000 |
??? |
50 |
1:50k |
This is the 'standard' line spacing for most surveys. It
represents the best combination of economy and detailed
information. |
| <=500 |
50 000 |
??? |
100 |
small areas |
These are 'detail' surveys, that are used for environmental
studies (nuclear waste disposal sites) and detailed geological
mapping/studies of mineral deposits and structural features. |
| Total |
1 536 000 |
??? |
|
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|
The NATGAM database is continually being updated, with ongoing
data recovery and reformatting.
The amount of coverage available (as of 2001-07-01) is shown below.
Ternary radioelement map of Canada showing coverage of NATGAM surveys.
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