State Boundary Marker
Boundary markers established to demarcate the boundary between states
Boundary markers established to demarcate the boundary between states
Control points established at the outer most limit of a country for the purpose of defining its maritime boundaries
Control points established using gravimeter and tied to IGNS
Points with height values
Survey stations established through trigonometric observation in the triangulation network
Control points established by astronomical observations
Control points established by survey techniques other than GPS
Control points established by GPS survey