21.   Then it correlates that rain data to digital maps showing the prevailing topography, soil types, and soil saturation within each region.

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

23.   When she carries a receiver, she said, the system converts her physical location into a digital map.

24.   The digital map will take up one terabyte or a million megabytes, says Dr. Jim Gray, a researcher at Microsoft leading the project.

25.   The digital maps are far more accurate then their predecessors, making them valuable to both the private and public sectors, Harris said.