Table 1
Main characteristics of the dataset covering the Bay of Biscay and surrounding continental shelves.
| Year | Survey name | Operator | Reference code | Sensor elevation (m) |
Line spacing (km) |
Strategies to compute map at 500 m | |
|---|---|---|---|---|---|---|---|
| 1 | 1962 | Lands | Shell | 1014 | 610 | 2 | Downward continuation |
| 2 | 1963 | Lorient–Arcachon | Shell | 2087 | 600 | 20 | Downward continuation |
| 3 | 1966 | Plateau continental Atlantique | Shell | 2502 | 500 | 4 | – |
| 4 | 1968 | Sud Gascogne sud | ESSO | 2577 | 1500 | 8 | Equivalent layer |
| 5 | 1968 | Sud Gascogne nord | ESSO | 2577 | 500 | 4 | – |
| 6 | 1969 | Gascogne | IPGP | IPG41 | 500 | 10 | – |
| 7 | 1983 | Sud Aquitaine | ESSO | 6200 | 780 | 1.2/3.6 | Downward continuation |
| 8 | 156 marine surveys | 0 | Upward continuation |
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