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<div class="title"><a class="el" href="classGeographicLib_1_1Utility.html" title="Some utility routines for GeographicLib. ">Utility</a> programs </div>  </div>
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<div class="textblock"><center> Back to <a class="el" href="start.html">Getting started</a>. Forward to <a class="el" href="organization.html">Code organization</a>. Up to <a class="el" href="index.html#contents">Contents</a>. </center><p>Various utility programs are provided with <a class="el" href="namespaceGeographicLib.html" title="Namespace for GeographicLib. ">GeographicLib</a>. These should be installed in a directory included in your PATH (e.g., /usr/local/bin). These programs are wrapper programs that invoke the underlying functionality provided by the library.</p>
<p>The utilities are</p><ul>
<li><a href="GeoConvert.1.html"><b>GeoConvert</b></a>: convert geographic coordinates using <a class="el" href="classGeographicLib_1_1GeoCoords.html" title="Conversion between geographic coordinates. ">GeoCoords</a>. See <a class="el" href="GeoConvert_8cpp.html">GeoConvert.cpp</a>.</li>
<li><a href="GeodSolve.1.html"><b>GeodSolve</b></a>: perform geodesic calculations using <a class="el" href="classGeographicLib_1_1Geodesic.html" title="Geodesic calculations ">Geodesic</a> and <a class="el" href="classGeographicLib_1_1GeodesicLine.html" title="A geodesic line. ">GeodesicLine</a>. See <a class="el" href="GeodSolve_8cpp.html">GeodSolve.cpp</a>.</li>
<li><a href="Planimeter.1.html"><b>Planimeter</b></a>: compute the area of geodesic polygons using <a class="el" href="classGeographicLib_1_1PolygonAreaT.html" title="Polygon areas. ">PolygonAreaT</a>. See <a class="el" href="Planimeter_8cpp.html">Planimeter.cpp</a>.</li>
<li><a href="TransverseMercatorProj.1.html"><b>TransverseMercatorProj</b></a>: convert between geographic and transverse Mercator. This is for testing <a class="el" href="classGeographicLib_1_1TransverseMercatorExact.html" title="An exact implementation of the transverse Mercator projection. ">TransverseMercatorExact</a> and <a class="el" href="classGeographicLib_1_1TransverseMercator.html" title="Transverse Mercator projection. ">TransverseMercator</a>. See <a class="el" href="TransverseMercatorProj_8cpp.html">TransverseMercatorProj.cpp</a>.</li>
<li><a href="CartConvert.1.html"><b>CartConvert</b></a>: convert geodetic coordinates to geocentric or local cartesian using <a class="el" href="classGeographicLib_1_1Geocentric.html" title="Geocentric coordinates ">Geocentric</a> and <a class="el" href="classGeographicLib_1_1LocalCartesian.html" title="Local cartesian coordinates. ">LocalCartesian</a>. See <a class="el" href="CartConvert_8cpp.html">CartConvert.cpp</a>.</li>
<li><a href="GeodesicProj.1.html"><b>GeodesicProj</b></a>: perform projections based on geodesics using <a class="el" href="classGeographicLib_1_1AzimuthalEquidistant.html" title="Azimuthal equidistant projection. ">AzimuthalEquidistant</a>, <a class="el" href="classGeographicLib_1_1Gnomonic.html" title="Gnomonic projection ">Gnomonic</a>, and <a class="el" href="classGeographicLib_1_1CassiniSoldner.html" title="Cassini-Soldner projection. ">CassiniSoldner</a>. See <a class="el" href="GeodesicProj_8cpp.html">GeodesicProj.cpp</a>.</li>
<li><a href="ConicProj.1.html"><b>ConicProj</b></a>: perform conic projections using <a class="el" href="classGeographicLib_1_1LambertConformalConic.html" title="Lambert conformal conic projection. ">LambertConformalConic</a> and <a class="el" href="classGeographicLib_1_1AlbersEqualArea.html" title="Albers equal area conic projection. ">AlbersEqualArea</a>. See <a class="el" href="ConicProj_8cpp.html">ConicProj.cpp</a>.</li>
<li><a href="GeoidEval.1.html"><b>GeoidEval</b></a>: look up geoid heights using <a class="el" href="classGeographicLib_1_1Geoid.html" title="Looking up the height of the geoid above the ellipsoid. ">Geoid</a>. See <a class="el" href="GeoidEval_8cpp.html">GeoidEval.cpp</a>.</li>
<li><a href="Gravity.1.html"><b>Gravity</b></a>: compute the earth's gravitational field using <a class="el" href="classGeographicLib_1_1GravityModel.html" title="Model of the earth&#39;s gravity field. ">GravityModel</a> and <a class="el" href="classGeographicLib_1_1GravityCircle.html" title="Gravity on a circle of latitude. ">GravityCircle</a>. See <a class="el" href="Gravity_8cpp.html">Gravity.cpp</a>.</li>
<li><a href="MagneticField.1.html"><b>MagneticField</b></a>: compute the earth's magnetic field using <a class="el" href="classGeographicLib_1_1MagneticModel.html" title="Model of the earth&#39;s magnetic field. ">MagneticModel</a> and <a class="el" href="classGeographicLib_1_1MagneticCircle.html" title="Geomagnetic field on a circle of latitude. ">MagneticCircle</a>. See <a class="el" href="MagneticField_8cpp.html">MagneticField.cpp</a>.</li>
<li><a href="RhumbSolve.1.html"><b>RhumbSolve</b></a>: perform rhumb line calculations using <a class="el" href="classGeographicLib_1_1Rhumb.html" title="Solve of the direct and inverse rhumb problems. ">Rhumb</a> and <a class="el" href="classGeographicLib_1_1RhumbLine.html" title="Find a sequence of points on a single rhumb line. ">RhumbLine</a>. See <a class="el" href="RhumbSolve_8cpp.html">RhumbSolve.cpp</a>.</li>
</ul>
<p>The documentation for these utilities is in the form of man pages. This documentation can be accessed by clicking on the utility name in the list above, running the man command on Unix-like systems, or by invoking the utility with the <code>--help</code> option. A brief summary of usage is given by invoking the utility with the <code>-h</code> option. The version of the utility is given by the <code>--version</code> option.</p>
<p>The utilities all accept data on standard input, transform it in some way, and print the results on standard output. This makes the utilities easy to use within scripts to transform tabular data; however they can also be used interactively, often with the input supplied via a pipe, e.g.,</p><ul>
<li>echo 38SMB4488 | GeoConvert -d</li>
</ul>
<p>Online versions of four of these utilities are provided:</p><ul>
<li><a href="https://geographiclib.sourceforge.io/cgi-bin/GeoConvert">GeoConvert</a></li>
<li><a href="https://geographiclib.sourceforge.io/cgi-bin/GeodSolve">GeodSolve</a></li>
<li><a href="https://geographiclib.sourceforge.io/cgi-bin/Planimeter">Planimeter</a></li>
<li><a href="https://geographiclib.sourceforge.io/cgi-bin/GeoidEval">GeoidEval</a></li>
<li><a href="https://geographiclib.sourceforge.io/cgi-bin/RhumbSolve">RhumbSolve</a></li>
</ul>
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