Editing 2920: Survey Marker
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Cueball and Megan have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models. | Cueball and Megan have found a {{w|survey marker}} on the ground. Survey markers such as these are used as reference points for the {{w|North American Datum|NAD 83 and NAVD 88}} geodetic reference systems, and the {{w|U.S. National Geodetic Survey}} has a database storing the coordinates of these markers. However, those two systems are being replaced by the {{w|National Spatial Reference System#Datum of 2022|New Datums of 2022}} (delayed to 2024-2025), which is primarily based on satellite systems and gravimetric models. | ||