Control points established by GPS survey

Control points established by survey techniques other than GPS

Control points established by astronomical observations

Survey stations established through trigonometric observation in the triangulation network

Points with height values

Control points established using gravimeter and tied to IGNS

Control points established at the outer most limit of a country for the purpose of defining its maritime boundaries

Boundary markers established to demarcate the boundary between states

A point to label a settlement such as city, town, pekan or village

A point to label a geographical feature such as sea, straits, gulf, river mouth, beach, cape, hill, mountain, abandoned village, harbour/port, swamp, pit, farm and country name