Jacob's thigh was disabled by the Angel, to show the patriarch that his prevalence was through his faith and prayer, not through force, Genesis 32:25-31. Smiting the thigh was a gesture of self-condemnation and grief, Jeremiah 31:19 Ezekiel 21:12.
In general, a datum is a base elevation used as a reference from which to reckon heights or depths. A tidal datum is a standard elevation defined by a certain phase of the tide.
Establishment Process Steps. 1  Decode the feature control frame. 2  Identify the datum features. 3  Construct the datum feature simulators. 4  Extract the datums from the simulators. 5  Use the datums to constrain a starter coordinate system in the simulators, thereby turning it into the sought after datum reference frame.