These up and down movements as the tip scans over the surface provide topographical information which a computer reassembles into an image of the sample.

Community map, 1:300.000, with only political borders, no topographical information except for lakes.

Land use map, 1:300.000, with statistical information only (no topographical information)

It quickly became clear that the areas in question, at least in eastern Canada, were so remote that there was no really accurate topographical information.

Geographical and topographical information gathered by long hunters would later be invaluable to the Nashville area's first settlers.

I described the lie of the ground and the little topographical information I had.

Researchers at the Agricultural Research Service blended this topographical information with the farm land's yield results from previous years.

The topographical information in the diary is largely confirmed, for instance, by the more famous account of George Sandys.

Particular attention was given to accounts containing geographical or topographical information, as well as those which discussed the manners and customs of the Holy Land.

Aerial photographs have been used since the 1920s to provide topographical information about an area.