Geospatial referencing systems provide unique codes for every location on the surface of the Earth (or other celestial bodies). These codes are used to measure distances, areas, and volumes, to navigate, and to predict how and where phenomena on the Earths surface may move, spread, or contract. Point-based, vector coordinate systems specify locations in relation to the origins of planar or spherical grids. Tessellated referencing systems specify locations hierarchically, as sequences of numbers that represent smaller and smaller subdivisions of two- or three dimensional surfaces that approximate the Earths shape, Linear referencing systems specify locations in relation to distances along a path from a starting point. Tessellation data models, are considered in Unit DM3 Tessellation data models, and linear referencing models are considered in Unit DM4 Vector data models.
Understand spatial reference systems and apply them to an EO dataset
GI-N2K