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Geodetic Toolbox

13 Jun 2007 (Updated 13 Jun 2007)

Toolbox for angle conversions, coordinate conversions, coordinate transformations, date conversions,

File Information
Description	A collection of geodetic functions that solve a variety of problems in geodesy. Supports a wide range of common and user-defined reference ellipsoids. Most functions are vectorized. Functions include: Angle Conversions deg2rad - Degrees to radians dms2deg - Degrees,minutes,seconds to degrees dms2rad - Degrees,minutes,seconds to radians rad2deg - Radians to degrees rad2dms - Radians to degrees,minutes,seconds rad2sec - Radians to seconds sec2rad - Seconds to radians Coordinate Conversions ell2utm - Ellipsoidal (lat,long) to UTM (N,E) coordinates ell2xyz - Ellipsoidal (lat,long) to Cartesian (x,y,z) coodinates sph2xyz - Shperical (az,va,dist) to Cartesian (x,y,z) coordinates xyz2sph - Cartesian (x,y,z) to spherical (az,va,dist) coordinates xyz2ell - Cartesian (x,y,z) to ellipsoidal (lat,long,ht) coordinates xyz2ell2 - xyz2ell with Bowring height formula xyz2ell3 - xyz2ell using complete Bowring version Coordinate Transformations refell - Reference ellipsoid definition ellradii - Various radii of curvature cct2clg - Conventional terrestrial to local geodetic cov. matrix clg2cct - Local geodetic to conventional terrestrial cov. matrix ct2lg - Conventional terrestrial (ECEF) to local geodetic (NEU) dg2lg - Differences in Geodetic (lat,lon) to local geodetic (NEU) lg2ct - Local geodetic (NEU) to conventional terrestrial (ECEF) lg2dg - Local geodetic (NEU) to differences in geodetic (lat,lon) direct - Direct geodetic problem (X1,Y1,Z1 + Az,VA,Dist to X2,Y2,Z2) inverse - Inverse geodetic problem (X1,Y1,Z1 + X2,Y2,Z2 to Az,VA,Dist) simil - Similarity transformation (translation,rotation,scale change) Date Conversions cal2jd - Calendar date to Julian date dates - Converts between different date formats doy2jd - Year and day of year to Julian date gps2jd - GPS week & seconds of week to Julian date jd2cal - Julian date to calenar date jd2dow - Julian date to day of week jd2doy - Julian date to year & day of year jd2gps - Julian date to GPS week & seconds of week jd2yr - Julian date to year & decimal year yr2jd - Year & decimal year to Julian date Error Ellipses errell2 - Computes error ellipse semi-axes and azimuth errell3 - Computes error ellipsoid semi-axes, azimuths, inclinations plterrel - Plots error ellipse for covariance matrix Miscellaneous findfixed - Finds fixed station based on 3D covariance matrix pltnet - Plots network of points with labels Example Scripts DirInv - Simple partial GUI script for direct and inverse problems DirProb - Example of direct problem Dist3D - Example to compute incremental 3D distances between points. InvProb - Example of inverse problem PltNetEl - Example plot of network error ellipses ToUTM - Example of conversion from latitude,longitude to UTM Most recent version can be found at <ftp://geod.nrcan.gc.ca/pub/GSD/craymer/software/matlab/geodetic/>.
Acknowledgements	This submission has inspired the following: , Equinoxes and Solstices
MATLAB release	MATLAB 7.3 (R2006b)
Zip File Content
Other Files	Contents.m, DirInv.m, DirProb.m, Dist3D.m, InvProb.m, PltNetEl.m, ToUTM.m, cal2jd.m, cct2clg.m, clg2cct.m, ct2lg.m, dates.m, dates_old.m, deg2rad.m, dg2lg.m, direct.m, dms2deg.m, dms2rad.m, doy2jd.m, ell2utm.m, ell2xyz.m, ellradii.m, errell2.m, errell3.m, findfixed.m, gps2jd.m, inverse.m, jd2cal.m, jd2dow.m, jd2doy.m, jd2gps.m, jd2yr.m, lg2ct.m, lg2dg.m, plterrel.m, pltmap.m, pltnet.m, rad2deg.m, rad2dms.m, rad2sec.m, refell.m, rotct2lg.m, rotlg2ct.m, sec2rad.m, simil.m, sph2xyz.m, txyz2ell.m, xyz2ell.m, xyz2ell2.m, xyz2ell3.m, xyz2sph.m, yr2jd.m

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Comments and Ratings (7)
15 Jun 2007	John D'Errico	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.
28 Jun 2007	Nice Work	Nice work
05 Oct 2007	Ali Ebrahimi
25 Feb 2008	Jagkrich A.warangkul	Thanks
01 Mar 2008	Ray Borough	Very Useful
09 Jul 2008	Gene Newton	Thank you.
11 Sep 2008	jaime torres	gracias

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