The measurement of a straight line perpendicularly downwards from a sea level horizontal plane.
Elevation
of a trajectory point LaTeX Math Inline body z(l)
above the Earth's sea level, where LaTeX Math Inline body l
| path length along the trajectory from Logging Reference Point |
See also
...
Natural Science / Physics / Measuring / Positioning / Subsurface Positioning
[ Deviation Data ]TVD = TVDSS + Sea_Elevation