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+ + <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"><nav class="wy-nav-top" aria-label="Mobile navigation menu" style="background: #353130" > + <i data-toggle="wy-nav-top" class="fa fa-bars"></i> + <a href="../../index.html">PROJ</a> + </nav> + + <div class="wy-nav-content"> + <div class="rst-content"> + <div role="navigation" aria-label="Page navigation"> + <ul class="wy-breadcrumbs"> + <li><a href="../../index.html" class="icon icon-home"></a> »</li> + <li><a href="../index.html">Coordinate operations</a> »</li> + <li><a href="index.html">Conversions</a> »</li> + <li>Axis swap</li> + <li class="wy-breadcrumbs-aside"> + <a href="https://github.com/OSGeo/PROJ/edit/8.2/docs/source/operations/conversions/axisswap.rst" class="fa fa-github"> Edit on GitHub</a> + </li> + </ul><div class="rst-breadcrumbs-buttons" role="navigation" aria-label="Sequential page navigation"> + <a href="index.html" class="btn btn-neutral float-left" title="Conversions" accesskey="p"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a> + <a href="cart.html" class="btn btn-neutral float-right" title="Geodetic to cartesian conversion" accesskey="n">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a> + </div> + <hr/> +</div> + <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> + <div itemprop="articleBody"> + + <section id="axis-swap"> +<span id="axisswap"></span><h1>Axis swap<a class="headerlink" href="#axis-swap" title="Permalink to this headline">¶</a></h1> +<div class="versionadded"> +<p><span class="versionmodified added">New in version 5.0.0.</span></p> +</div> +<p>Change the order and sign of 2,3 or 4 axes.</p> +<table class="docutils align-default"> +<colgroup> +<col style="width: 27%" /> +<col style="width: 73%" /> +</colgroup> +<tbody> +<tr class="row-odd"><td><p><strong>Alias</strong></p></td> +<td><p>axisswap</p></td> +</tr> +<tr class="row-even"><td><p><strong>Domain</strong></p></td> +<td><p>2D, 3D or 4D</p></td> +</tr> +<tr class="row-odd"><td><p><strong>Input type</strong></p></td> +<td><p>Any</p></td> +</tr> +<tr class="row-even"><td><p><strong>Output type</strong></p></td> +<td><p>Any</p></td> +</tr> +</tbody> +</table> +<p>Each of the possible four axes are numbered with 1–4, such that the first input axis +is 1, the second is 2 and so on. The output ordering is controlled by a list of the +input axes re-ordered to the new mapping.</p> +<section id="usage"> +<h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2> +<p>Reversing the order of the axes:</p> +<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>+proj=axisswap +order=4,3,2,1 +</pre></div> +</div> +<p>Swapping the first two axes (x and y):</p> +<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>+proj=axisswap +order=2,1,3,4 +</pre></div> +</div> +<p>The direction, or sign, of an axis can be changed by adding a minus in +front of the axis-number:</p> +<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>+proj=axisswap +order=1,-2,3,4 +</pre></div> +</div> +<p>It is only necessary to specify the axes that are affected by the swap +operation:</p> +<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>+proj=axisswap +order=2,1 +</pre></div> +</div> +</section> +<section id="parameters"> +<h2>Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline">¶</a></h2> +<dl class="std option"> +<dt class="sig sig-object std" id="cmdoption-arg-order"> +<span class="sig-name descname"><span class="pre">+order</span></span><span class="sig-prename descclassname"><span class="pre">=<list></span></span><a class="headerlink" href="#cmdoption-arg-order" title="Permalink to this definition">¶</a></dt> +<dd><p>Ordered comma-separated list of axis, e.g. <em>+order=2,1,3,4</em>. +Adding a minus in front of an axis number results in a change of direction +for that axis, e.g. southward instead of northward.</p> +<p><em>Required.</em></p> +</dd></dl> + +</section> +</section> + + + </div> + </div> + <footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer"> + <a href="index.html" class="btn btn-neutral float-left" title="Conversions" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a> + <a href="cart.html" class="btn btn-neutral float-right" title="Geodetic to cartesian conversion" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right" aria-hidden="true"></span></a> + </div> + + <hr/> + + <div role="contentinfo"> + <p>© Copyright 1983-2022. + <span class="lastupdated">Last updated on 22 Mar 2022. + </span></p> + </div> + + Built with <a href="https://www.sphinx-doc.org/">Sphinx</a> using a + <a href="https://github.com/readthedocs/sphinx_rtd_theme">theme</a> + provided by <a href="https://readthedocs.org">Read the Docs</a>. + + +</footer> + </div> + </div> + </section> + </div> + <script> + jQuery(function () { + SphinxRtdTheme.Navigation.enable(true); + }); + </script> + +</body> +</html>
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