Variable EPSG_9681`Const`

EPSG_9681: "+vunits=m +no_defs +type=crs" = '+vunits=m +no_defs +type=crs'

NVD 1992 height

CRS-VERTCRS [9681]
Area: Bangladesh - onshore.
Unit: metre
Accuracy: null
BBOX: 26.64,88.01,20.52,92.67