The ground survey and aerial photography work in the border area has been completed.

You and I are doing a ground survey.

For the ground survey, the five of them functioned simply as specimen collectors.

The first work in 1977 was a ground survey and the 1980 investigation consisted of excavations on site.

Other cities began using aerial mapping, as they found it was faster and less expensive than the ground surveys of the time.

This used satellite imagery, with ground survey used for checking.

The speed and precision of the system was far superior to traditional ground surveys.

Four areas were excavated based on the ground survey and traces of a basalt wall.

"Doesn't look as if you can make much of a ground survey from up here," Bud remarked.

"We won't even need a ground survey for the skyway, eh?"