| The first step in the process is a binary scanning of the hypsographic separation of the original map. |
| These data have been produced by photogrammetric methods and by scanning, tagging, vectorizing, and gridding of hypsographic map separates. |
| Of these techniques, the derivation of DEM's from vector hypsographic and hydrographic data produces the most accurate model. |
| AverStar's use of hydrologic and hypsographic elements in creating the elevation model has resulted in a more accurate portrayal of hydrographic flow on the model. |
| After hypsographic files are warped, they are used as input to generate vector lines from a raster-to-vector program. |
