21.   Spacecraft sent to Venus and Mars have produced better topographical maps of those worlds than exist for Earth.

22.   The animation is only intermittently interesting, with a few gorgeous landscapes and a chase sequence depicted on a topographical map.

23.   The shop includes original topographical maps of the world, as well as maps of European cities, regions and a collection of architectural engravings.

24.   There is a small, crude topographical map for the entire world.

25.   Twenty seconds is all the time it takes for a scanner to digitally create a topographical map of the human face.

26.   Twenty seconds is all the time it takes for the scanner to digitally create a topographical map of the human face.

27.   Topographical maps display the location of streams and water runoff paths that may carry gold flushed out of hillsides and mine tailings.

28.   Using high speed computers, experts there will convert the recorded data into a digital topographical map of the regions scanned by the shuttle.

29.   Using its topographical maps, the robot can calculate where the shadows of hills and mountains fall at the time.

30.   Using satellite-plotted topographical maps and other state-of-the-art information, Lamphere was able to fashion a perfect scale model.