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16 Oct 2009	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Jonathan	Hello, Thank you for such a useful toolbox! I have a question, however, regarding transforming lat,lon on the WGS84 ellipsoid to local North East Up. If I use the same lat,lon coordinate as both my point to convert and my origin, why would I get a -21.5 km local North value? Shouldn't North and East both be zero? Thanks again, Jon <SNIP> >> [a,b,e2,finv] = refell('WGS84'); %get ellipsoid params rlat = deg2rad(40); rlon = deg2rad(-108); %lat,lon [Xec Yec Zec] = ell2xyz(rlat,rlon,0,a,e2) %convert to ECEF xyz [N E Up] = ct2lg(Xec,Yec,Zec,rlat,rlon) %convert to local NEU Xec = -1.5119e+06 Yec = -4.6532e+06 Zec = 4.0780e+06 N = -2.1054e+04 E = 0 Up = 6.3693e+06 </SNIP>
29 Jul 2009	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Sepideh	Thanks for that, very useful
24 Feb 2009	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Craymer, Mike	I corrected the bug for vector and array input to function ell2utm per Sebastian Holz's comments and posted a new version 2.91. Unfortunately, the fix only worked for row vectors. I've corrected it again in version 2.92 and tested it this time to make sure it works. Sorry for any problems this may have caused. In addition to error checking, I'll consider adding array input to all functions in the next major release (this Summer I hope).
18 Feb 2009	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Hölz, Sebastian	There is a potential bug in function ell2UTM, which may lead to wrong results in the calculated northing, if the funciton is called with a vector containing coordinates from both southern and northern hemisphere. Change lines 23-27, which read ... if lat>=0 No=0; else No=10000000; end to ... No(size(lat))=0; % False northing (north) No(lat<0) = 1e7; % False northing (south) Sebastian
27 Jan 2009	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Christopher	under matlab which file do i put this in so that it is being used?
11 Sep 2008	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	torres, jaime	gracias
09 Jul 2008	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Newton, Gene	Thank you.
01 Mar 2008	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Borough, Ray	Very Useful
25 Feb 2008	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	A.warangkul, Jagkrich	Thanks
05 Oct 2007	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Ebrahimi, Ali
28 Jun 2007	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	Work, Nice	Nice work
15 Jun 2007	Geodetic Toolbox Toolbox for angle, coordinate and date conversions and transformations. Version 2.92a. Author: Mike Craymer	D'Errico, John	This seems pretty good from what I checked. There are many conversions in here. A couple of minor points. I notice that there is no error checking. For example, in ellradii one must provide an axis length and eccentricity (squared). But there are no checks on the proper number of parameters or even on the sign of the eccentricity. In dms2deg, I noticed one interesting feature. Converting from 32 degrees, 12 minutes, -3 seconds, results in a degree prediction of: dms2deg([32 12 -3]) ans = -32.201 Overall, its still pretty good.
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