| Definition Type: | Element |
| Name: | realizationEpoch |
| Namespace: | http://www.opengis.net/gml |
| Type: | date:http://www.w3.org/2001/XMLSchema |
| Containing Schema: | datums.xsd |
| Abstract | |
| Documentation: |
The time for which this datum definition is valid. This time may be precise (e.g.
1997.0 for IRTF97) or merely a year (e.g. 1983 for NAD83). In the latter case, the
epoch usually refers to the year in which a major recalculation of the geodetic control
network, underlying the datum, was executed or initiated.
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