Guam Vertical Datum of 2004
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Guam Vertical Datum of 2004 Open
Datum Details [VALID]
Name: Guam Vertical Datum of 2004
Code: 1126
Type: vertical
Usage:
Usage Details
Scope: Geodesy, topographic mapping.
Extent:

Origin: Mean sea level at Apra harbor, Guam. Benchmark 1630000 TIDAL 4 = 2.170m relative to US National Tidal Datum Epoch 1983-2001. MSL is 0.419m above MLLW and the BM is 2.589m above MLLW.
Realisation Method:
Publication Date: 2009