What's the difference between geodesy and geodetic?

Geodesy

Definition:

(n.) 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.

Example Sentences:

(1) Chris Rizos, a professor of geodesy and navigation at the University of New South Wales, said that he believed it was unlikely the images were of a plane.
(2) Determining this to an accuracy of about 10 centimetres in 730km is required – and, apparently, is possible by geodesy.
(3) Here’s an explanation as to how the process could have worked from Chris Rizos, a professor of geodesy and navigation at the University of New South Wales: DigitalGlobe have several satellites and they have the highest accuracy in terms of pixels of any commercial satellite imaging system.

Definition:

Example Sentences:

(1) The shortest path consists of the geodetic line at the endocardial layer and the normal that connects the endocardium with the point considered.