Name	Notation	Description	Types	Status
A depression	depression	Lower than surrounding land beyond a 50 m radius, with no sur...	Concept	stable
A flat	flat	Slope less than 3 degrees and not a hilltop, ridge, valley bo...	Concept	stable
A hilltop	hilltop	Higher than all or nearly all of the surrounding land beyond ...	Concept	stable
inapplicable	inapplicable	None of the codes in the table are applicable in the context ...	Concept	stable
A ridge	ridge	Higher than all or nearly all of the surrounding land, but el...	Concept	stable
A saddle	saddle	A depression located along the axial trend of an anticline; a...	Concept	stable
A slope	slope	Neither crest nor depression or valley bottom, and with slope...	Concept	stable
unknown	unknown	Unknown local topography	Concept	stable
A valley bottom	valleyBottom	Lower than nearly all of surrounding land beyond a 50 m radiu...	Concept	stable