Variable EPSG_6639`Const`

EPSG_6639: "+vunits=m +no_defs +type=crs" = '+vunits=m +no_defs +type=crs'

Guam 1963 height

CRS-VERTCRS [6639]
Area: Guam - onshore.
Unit: metre
Accuracy: null
BBOX: 13.7,144.58,13.18,145.01