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Topic: Geodectic datum

	Datums and Coordinate Conversion Practical Exercise
		If the desired input datum is not already displayed in the upper half of the window, select the desired datum using the Datum pull-down list.
		If the desired output datum is not already displayed in the lower half of the window, select the desired datum using the Datum pull-down list, just as for the input datum.
		DATUM – This line identifies the datum for which the coordinates in the file are defined.
	www.oc.nps.navy.mil /oc3902/lab2_datums.html (3108 words)

	Geodetic Center of the Lower 48 United States of America
		The little bronze plaque at that site marks the exact North American Datum, a fixed point from which a sixth of the world's land surface was surveyed.
		This triangulation station was selected to be the Datum in 1901 by the Coast and Geodectic Survey, the primary map makers in America at the time.
		In 1913, it was adopted as the datum for Canada and Mexico's surveys as well.
	ludb.clui.org /ex/i/KS3130 (204 words)

	Intergovernmental Committee on Survey and Mapping - GDA
		The Geocentric Datum of Australia (GDA) is a coordinate reference system that best fits the shape of the earth as a whole.
		Following a resolution of the Intergovernmental Committee on Surveying and Mapping (ICSM) in 1988, it is being progressively implemented throughout Australia as the preferred datum for all spatial information.
		National datums were commonly non-geocentric before satellite based navigation systems were established in the early 1970's.
	www.icsm.gov.au /icsm/gda/index.html (254 words)

	Geodesy :: Geomatics
		Datum Pro: Windows program which converts between map datums and projections, including Gauss Kruger, TM, UTM, and Lambert Conic grids.
		Geodetic Datum Overview: Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
		National Imagery and Mapping Agency Geospatial Sciences Division: Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air and Bouguer gravity anomalies).
	science.gourt.com /Earth-Sciences/Geomatics/Geodesy.html (444 words)

	Trexle - Geodesy
		Geodetic Datum Overview - Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
		Curtin University Geodesy Group - Overview of the geodetic activities the group, biographies of members and details of recent research projects.
		National Imagery and Mapping Agency Geospatial Sciences Division - Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air and Bouguer gravity anomalies).
	www.trexle.com /Directory/Top/Science/Earth_Sciences/Geomatics/Geodesy (224 words)

	Opera Directory (Site not responding. Last check: 2007-10-26)
		Overview of the geodetic activities the group, biographies of members and details of recent research projects.
		Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
		Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air and Bouguer gravity anomalies).
	portal.opera.com /web/?cat=27762 (218 words)

	GSS Cave Location Correction Form (Site not responding. Last check: 2007-10-26)
		NAD83 is the North American Datum of 1983.
		NGVD29 is North American Geodetic Vertical Datum of 1929.
		NAVD88 is the North American Geodetic Vertical Datum of 1988.
	maps.vadose.org:81 /apps/gssinfo/location.html (373 words)

	Map Projections and the conversion of geodetic positions to UTM coordinates
		For example, the NAD-27 datum (North American Datum, 1927) is based on the latitude and longitude of Red Falls, Iowa, whereas the WGS-84 (the World Geodetic Systems 1984 datum) is based on measurements made from space, beyond the effects of local variations in gravity.
		Each datum embodies its own concept of latitude and longitude, and at any given locality, changing the datum may change a coordinate reading by several hundred metres, as in the case of Sudbury.
		Geodetic (geographic) coordinates are given in terms of latitudinal and longitudinal degrees measured relative to the equator and either east or west of the prime meridian running through Greenwich, England, respectively.
	instruct.uwo.ca /earth-sci/505/utms.htm (1794 words)

	Science> Earth Sciences> Geomatics> Geodesy
		Converts individual positions between over 400 datums to or from user specified TM and UTM grids.
		- Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air and Bouguer gravity anomalies).
		- Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
	www.computerrescue911.com /ODP/Science/Earth_Sciences/Geomatics/Geodesy (255 words)

	Science Central - Geodesy Group at University of New Brunswick, Canada
		Converts individual positions between over 400 datums to or from user specified TM and...
		): Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
		): Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air...
	www.sciencecentral.com /site/504345 (178 words)

	Thursday April 5, 2006 Astronomy and Telescopes presents: ODP Search 1078691099 (Site not responding. Last check: 2007-10-26)
		Geodesy Group at University of New Brunswick, Canada - Research in geodesy and precision navigation.
		Geodesy Laboratory and PANGA Data Analysis Facility - They are part of a research program with the Department of Geological Sciences, Central Washington University.
		James Q. Jacobs - Geodesy Page - Definitions relating to geodesy, explanations of coordinate systems, and geodesy formulas.
	www.kyes-world.com /Earth_Sciences/Geodesy.html (304 words)

	TheMostValuablePage Directory - /Science/Earth_Sciences/Geomatics/Geodesy
		» Datum Pro - Windows program which converts between map datums and projections, including Gauss Kruger, TM, UTM, and Lambert Conic grids.
		» Geodetic Datum Overview - Introduction to geodetic datums, geometric earth models, global coordinate systems (such as latitude and longitude), datum conversions, and related topics.
		» National Imagery and Mapping Agency Geospatial Sciences Division - Branch of US military responsible for maintaining satellite geodesy, conducting geodectic survyes, and collecting, processing, and evaluating gravity data (free-air and Bouguer gravity anomalies).
	themostvaluablepage.com /Top/Science/Earth_Sciences/Geomatics/Geodesy (344 words)

	Geona.com -
		Reference ellipsoid defined with derived geometrical constants, equation of the meridional ellipse, and geometry of the meridian section.
		Convert positions between datums and different grid projections Datumpro converts Latitude, longitude, Northing, Easting, TM / UTM / Lambert Conic Grids, over 650 datum transformations and 450 Grids, single points or co-ordinate lists,...
		Central Washington University's Pacific Northwest Geodetic Array web page - Geodesy Laboratory and PANGA Data Analysis Facility This site requires the use of frames.
	www.geona.com /search?c=/Science/Earth+Sciences/Geomatics/Geodesy&b= (338 words)

	Planning SA \| DataDownload (Site not responding. Last check: 2007-10-26)
		Once the conversion is complete it will now be possible to directly use the.tab file directly in MapInfo.
		All data available for download from the Planning SA DataDownload site is based on the Geodectic Datum of Australia (GDA).
		Planning SA uses the South Australian Government standard parameters for Lambert Conformal Conic coordinate system.
	www.atlas.sa.gov.au /datadownload/help.cfm (663 words)

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