## Convert from ED50 to WGS84 positions

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 Convert from ED50 to WGS84 positions Solan 08.12.09 05:28 Dear groupmemers,I need to convert ED50 positions to WGS84. Has anyone written a matlabfunction that can do that?Nils Olav Re: Convert from ED50 to WGS84 positions Rune Allnor 08.12.09 05:39 I wouldn't be surprised if the mapping toolboxcontains such routines.Rune Re: Convert from ED50 to WGS84 positions Rob Comer 12.12.09 15:33 Rune Allnor wrote in message <621d7f44-299a-496e-a019-5a5219833220@a32g2000yqm.googlegroups.com>...There is no Mapping Toolbox function to do the transformation in a single step, but the toolbox can help. The basic procedure is to:1. Use the geodetic2ecef function with the ED50 reference ellipsoid to convert from ED50 latitude, longitude, and elllipsoidal height to X, Y, and Z in the corresponding earth-centered, earth-fixed geocentric system.2. Apply a Helmert ("seven-parameter") transformation to transform X, Y, and Z to a WGS84 geocentric system. This is easy to code, but you'll need to look up a set of parameters somewhere (or fit them yourself if you have appropriate truth data).3. Use the ecef2geodetic function with the WGS84 reference ellipsoid to convert from WGS84 X, Y, Z to WGS84 latitude, longitude, and ellipsoidal height.Rob ComerMapping Toolbox DevelopmentThe MathWorks, Inc. Re: Convert from ED50 to WGS84 positions Aolun Zhou 27.01.16 02:42 "Rob Comer" wrote in message ... This looks like a perfect way, but what is the ED50 reference ellipsoid?  The reference ellipsoid class doesn't have ED50 in its list, and Ed50 was reported as error when I simply typed in. Re: Convert from ED50 to WGS84 positions Rob Comer 28.01.16 08:37 "Aolun Zhou" wrote in message ... ED50 uses the International 1924 ellipsoid. For example, see: http://georepository.com/datum_6230/European-Datum-1950.html In Mapping Toolbox, use:  referenceEllipsoid('International 1924')