| ground survey(expression, survey, land, ground, operation) |
| terrestrial survey(expression, survey, land, ground, operation) |
| ground mapping(expression, survey, land, ground, operation) |
| ground radiological survey(expression, survey, land, ground, operation) |
| surface mapping(expression, survey, land, ground, operation) |
| surface survey(expression, survey, land, ground, operation) |
| land-based survey(expression, survey, land, ground, operation) |
| surface study(expression, survey, land, ground, operation) |
| land operations(expression, survey, land, ground, operation) |
| ground prospecting(expression, survey, land, ground) |
| land exploration(expression, survey, land, ground, operation) |
| land survey(expression, survey, land, ground, operation) |
| land works(expression, survey, land, ground, operation) |
| on-the-ground survey(expression, survey, land, ground, operation) |
| reconnaissance from the ground(expression, survey, land, ground) |
| surface measurements(expression, survey, land, ground, operation) |
| astronomy(noun, sky, observation, astrophysics) |
| ground investigations(expression, survey, land, ground, operation) |
| ground reconnaissance(expression, survey, land, ground) |
| land data acquisition(expression, survey, land, ground, operation) |