Specifies the Spatial Reference Model (SRM) defining relevant aspects of spatial positioning and related information processing. The SRM allows precise and unambiguous specification of geometric properties such as position (location), direction, and distance. The SRM addresses the needs of a broad community of users, who have a range of accuracy and performance requirements in computationally intensive applications. Aspects of this standard apply to, but are not limited to: 1.mapping, charting, geodesy, and imagery; 2.topography; 3.location-based services; 4.oceanography; 5.meteorology and climatology; 6.interplanetary and planetary sciences; 7.embedded systems; and 8.modelling and simulation.