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Answer: A datum is a mathematical model of the Earth which approximates the shape of the Earth, and enables calculations such as position and area to be carried out in a consistent and accurate manner. ... Click here to view the map datum list for Garmin units.
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www.garmin.com/support/faqs/faq.jsp?faq=17
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List of geodetic map datums and their parameters used by the Eye4Software GPS Toolkit and Coordinate Calculator ... Today, Eye4Software B.V. Released version 2.2 of the GPS Toolkit, this new version also supports map datum and grid transformations.
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www.eye4software.com/products/coordinatecalculator/datu...
www.eye4software.com/products/coordinatecalculator/datum/173/
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MapTools - Tools and instructions for GPS users to work with UTM, MGRS and lat/lon coordinate systems. ... Every map that shows a geographic coordinate system such as UTM or Latitude and Longitude with any precision will also list the datum used on the map.
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www.maptools.com/UsingUTM/mapdatum.html
www.maptools.com/UsingUTM/mapdatum.html
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Geodetic datums define the size and shape of the earth and the origin and orientation of the coordinate systems used to map the earth. Hundreds of different datums have ... Referencing geodetic coordinates to the wrong datum can result in position errors of hundreds of meters. ... A More Complete List of Reference Ellipsoids...
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www.colorado.edu/geography/gcraft/notes/datum/datum_f.h...
www.colorado.edu/geography/gcraft/notes/datum/datum_f.html
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Delta parameters are with respect to WGS-84 parameters for conversion from the specified datum to WGS-84. ... Parameter Delta a is the WGS-84 Equatorial radius minus the specified datum Equatorial radius in meters.
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www.colorado.edu/geography/gcraft/notes/datum/dlist.htm...
www.colorado.edu/geography/gcraft/notes/datum/dlist.html
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These differing definitions require caution when using the word "datum." The first definition makes datum synonymous with the selection of a reference coordinate system (origin and orientation). The second definition makes datum synonymous with a list of coordinates of the control points.
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www.ngs.noaa.gov/faq.shtml
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Datum, Ellipsoid, Delta a, Delta f (* 10^4), Delta X, Delta Y, Delta Z. ... Delta parameters are with respect to WGS-84 parameters for conversion from the specified datum to WGS-84. ... Parameter Delta a is the WGS-84 Equatorial radius minus the specified datum Equatorial radius in meters.
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www.ncgia.ucsb.edu/education/curricula/giscc/units/u015...
www.ncgia.ucsb.edu/education/curricula/giscc/units/u015/tables/table03.html
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Note that WGS84 is functionally equivalent to the new Australian standard datum, GDA94, shown in the map datum list as GDA. The WGS84 datum is used to be consistent with older GPS receivers that don’t have a GDA94 setting.
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www.dpi.nsw.gov.au/__data/assets/pdf_file/0008/178766/S...
www.dpi.nsw.gov.au/__data/assets/pdf_file/0008/178766/Setup-Garmin-GPS-receivers_v2_3.pdf
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You can subscribe to the list, or change your existing subscription, in the sections below. ... To see the collection of prior postings to the list, visit the searchable Archive. ... This is a private list, which means that the list of members is not available to non-members.
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lists.maptools.org/mailman/listinfo/tiff
lists.maptools.org/mailman/listinfo/tiff
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