Definition
A digital file containing terrain elevation data for the bare ground surface, organized as a grid of points with each point assigned a height value above a reference such as mean sea level. The model represents the shape of the land itself, without buildings, trees, or other surface features.
Plain English
A computer file that stores the height of the ground across an area, point by point, so software can draw or calculate the shape of the terrain.
Context Anchor
Seen in terrain databases, moving-map displays, flight-planning software, and systems that warn pilots about nearby terrain.
Derivation
Digital means stored as numbers a computer can read. Elevation means height above a reference point. Model here means a representation of something real -- in this case, the shape of the ground -- not a physical object or a perfect copy.
Why Pilots Care
Provides the terrain data that powers modern safety systems and helps pilots maintain safe clearance over mountains and obstacles.
Analogy
Like a detailed raised-relief map that a computer can read instantly instead of a paper contour chart.
Grounding Statement
Picture the ground covered by a fine grid, with each square labeled by how high that piece of ground is.
Intuition Check
A Digital Elevation Model is not a photograph or a normal visual map. It is terrain height data that a computer can use to draw or calculate terrain information.
Example Sentence 1
The terrain awareness system uses a digital elevation model to compare the aircraft's position against the height of the ground ahead.
Example Sentence 2
During flight planning the pilot checked the Digital Elevation Model to confirm minimum safe altitudes through the pass.