Elevations are in meters relative to mean sea level.
Spacing of the elevations along and between each profile is 3 arc-seconds with 1,201 elevations per profile, for a total of 1,442,401 elevations per data file. The water elevation data is stored in another matrix which is then displayed on top of the land map. The water level is determined by average rainfall, input from tributaries, and other natural or artificial water sources.