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BM
General
This category includes monumented control points such as geodetic control station, benchmarks, tide station, standard traverse marks, ground control point, gravity station and remote sensing imagery such as aerial photography and satellite imagery.
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Global Positioning System (GPS) Station
G2GZA0010Control points established by GPS survey
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Survey Point
G2GZA0020Control points established by survey techniques other than GPS
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Laplace Station
G2GZA0030Control points established by astronomical observations
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Trigonometry Station
G2GZA0040Survey stations established through trigonometric observation in the triangulation network
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Height Point
G2GZA0050Points with height values
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Gravity Reference Point
G2GZA0060Control points established using gravimeter and tied to IGNS
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Base Point
G2GZA0070Control points established at the outer most limit of a country for the purpose of defining its maritime boundaries
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International Boundary Marker
G2GZA0080Boundary markers established in a joint survey to demarcate the international boundary between the countries concerned
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State Boundary Marker
G2GZA0090Boundary markers established to demarcate the boundary between states
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Label of Settlement
G2GZB0010A point to label a settlement such as city, town, pekan or village