Hi ground water level (Subsidence Overlay)

Icon	Key	Unit	Range	Description	Default value
	HI_GROUND_WATER_LEVEL	m + datum		The yearly high (average) ground water level in this area. Note that this is the ground water level (datum), not the ground water depth.	n/a

Notes

This value is overruled when a High ground water prequel is loaded in. Regardless of whether a GeoJSON or GeoTIFF is used, this should be a non-negative value. Negative values would represent water on the surface of the land, and may lead to unpredictable behavior.