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Similar a History Of North American Datums
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History Of North American Datums
- 1. Brief History of North American Horizontal Datums New England Datum of 1879 United States Standard Datum of 1901 North American Datum of 1913 North American Datum of 1927 North American Datum of 1983
- 3. Fire Island Triangulation Network – Long Island, New York – Point Judith, Rhode Island. 1851
- 4. U.S. Coast Survey - Chart of Boston Harbor – 1857 – Based on early New England Datum.
- 7. Transcontinental Arc of Triangulation - 1899
- 10. Ellipsoid – Geoid surfaces in comparison with local topography
- 13. Relative Datums
- 16. Geodetic Latitude & Longitude
- 21. Preparing a station for observations – North Dakota - 1913
- 22. Triangulation setup – Kaibab Plateau, Arizona - 1914
- 23. Triangulation crew, Idaho-Montana - 1922
- 24. Backsighting with a Heliotrope – Snake River, Idaho - 1922
- 25. Measuring a baseline with an Invar tape, Southeastern Oregon - 1916
- 26. Measuring a baseline with a microwave distance meter – Cook Inlet, Alaska - 1970
- 27. NAD-27 Triangulation Network in The U.S. as of 1931
- 32. NAD-27 relative to NAD-83
- 33. There are differences in the two datums ranging from ~100m in the western U.S., to ~1m – 3m in the central and eastern U.S. as show below.
- 41. NGS - Data Sheets KG0640 *********************************************************************** KG0640 FBN - This is a Federal Base Network Control Station. KG0640 DESIGNATION - MEADES RANCH RESET KG0640 PID - KG0640 KG0640 STATE/COUNTY- KS/OSBORNE KG0640 USGS QUAD - MEADES RANCH (1978) KG0640 KG0640 *CURRENT SURVEY CONTROL KG0640 ___________________________________________________________________ KG0640* NAD 83(1997)- 39 13 26.71169(N) 098 32 31.74579(W) ADJUSTED KG0640* NAVD 88 - 600.3 (meters) 1969. (feet) GPS OBS KG0640 ___________________________________________________________________ KG0640 X - -734,972.577 (meters) COMP KG0640 Y - -4,893,188.523 (meters) COMP KG0640 Z - 4,011,982.818 (meters) COMP KG0640 LAPLACE CORR- -2.96 (seconds) DEFLEC99 KG0640 ELLIP HEIGHT- 573.99 (meters) (08/12/03) GPS OBS KG0640 GEOID HEIGHT- -26.35 (meters) GEOID03 KG0640 KG0640 HORZ ORDER - B KG0640 ELLP ORDER - FOURTH CLASS I