grou - heli
- ground
- ground control point
- ground control survey
- ground cover
- ground elevation
- ground features
- ground forms
- ground level
- ground line
- ground line gradient
- ground location
- ground map
- ground nadir
- ground nadir point
- ground object
- ground observation
- ground parallel
- ground photogrammetric camera
- ground photograph
- ground photography
- ground plane
- ground point
- ground polygonometry
- ground reconnaissance
- ground reference plane
- ground signs
- ground station
- ground stereophotogrammetric survey
- ground stereophotogrammetry
- ground survey
- ground table
- ground triangulation
- ground work
- grounds
- group of photographs
- group of two observations
- group-flashing
- group-like space
- group-occulting
- grouping process
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