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[F1ANNEX III U.K. REQUIREMENTS FOR SPATIAL DATA THEMES LISTED IN ANNEX II TO DIRECTIVE 2007/2/EC

1. ELEVATION U.K.

1.3. Elevation – Base Types U.K.

1.3.1. Enumerations U.K.
1.3.1.1. Elevation Property Type (ElevationPropertyTypeValue) U.K.

Enumeration type which determines the elevation property which has been measured or calculated.

Values for the enumeration ElevationPropertyTypeValue U.K.
Value Definition
height Elevation property measured along a plumb line in a direction opposite to Earth's gravity field (upwards).
depth Elevation property measured along a plumb line in a direction coincident to Earth's gravity field (downwards).
1.3.1.2. Surface Type (SurfaceTypeValue) U.K.

Enumeration type which determines the elevation surface with regard to its relative adherence to the Earth's bare surface.

Values for the enumeration SurfaceTypeValue U.K.
Value Definition
DTM Digital terrain model.
DSM Digital surface model.]