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Geodesy Videos

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The Florida Geospatial Users Group has recently posted several 1-hr videos that describe some of the fundamental concepts in geodesy including; reference surfaces, horizontal and vertical datums and the forthcoming 2022 datums planned by NGS -- https://www.youtube.com/channel/UCG69vYuN1Q61fWKiXffzo9A/videos

These may help geocachers better understand the importance of what are generically referenced on this site as "bench marks"

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