The geoid is an equipotential, or level, surface of the earth's gravity field. Any vertical coordinate system can be used with different horizontal coordinate systems. Most vertical coordinate systems are gravity related. Surfaces: ellipsoidal (spheroidal) or orthometric (geoidal/gravity related). Vertical coordinate system can be referenced to two types of Horizontal coordinate system, a vertical coordinate system ensures thatÄata is spatially located accurately in relation to other data. Vertical coordinate systemsĪ vertical coordinate system defines the reference Understanding the following terms will help in choosing the correct vertical reference settings. Use the information below to better understand vertical datums and coordinate systems, the difference between a geoid and an ellipsoidal surface, and how to select the correct image and control vertical reference settings for your Drone2Map projects. With the variety of drones, cameras, and flight planning applications available, setting the correct vertical units and reference is vital to ensuring your Drone2Map products align with other layers in the ArcGIS platform.
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