Geodesy
That branch of applied mathematics which determines,
by means of observations and measurements, the figures and
areas of large portions of the earth's surface, or the general figure
and dimenshions of the earth; or that branch of surveying in which
the curvature of the earth is taken into account, as in the surveys of
States, or of long lines of coast.

Height Modernization
is the establishment of accurate, reliable heights using GPS technology
in conjunction with traditional leveling, gravity, and modern remote sensing
information. With it we will improve our knowledge of elevation, the most basic
of mapping and planning tools, making it better, faster cheaper.