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 matlab Nils Olav |

Re: Convert from ED50 to WGS84 positions | Rune Allnor | 08.12.09 05:39 | I wouldn't be surprised if the mapping toolbox Rune |

Re: Convert from ED50 to WGS84 positions | Rob Comer | 12.12.09 15:33 | Rune Allnor <all...@tele.ntnu.no> 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 Comer |