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273 lines
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273 lines
23 KiB
HTML
<!DOCTYPE html>
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<meta http-equiv="content-type" content="text/html;charset=utf-8">
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<title>kml.py</title>
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<link rel="stylesheet" href="../pycco.css">
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<body>
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<div id="background"></div>
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<div class='section'>
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<div class='docs'><h1>kml.py</h1></div>
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<div class='section' id='section-0'>
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<div class='code'>
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<div class="highlight"><pre><span class="kn">from</span> <span class="nn">kartograph.renderer</span> <span class="kn">import</span> <span class="n">MapRenderer</span>
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<span class="kn">from</span> <span class="nn">kartograph.errors</span> <span class="kn">import</span> <span class="n">KartographError</span>
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<span class="kn">from</span> <span class="nn">pykml.factory</span> <span class="kn">import</span> <span class="n">KML_ElementMaker</span> <span class="k">as</span> <span class="n">KML</span></pre></div>
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<div class='code'>
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<div class="highlight"><pre><span class="k">class</span> <span class="nc">KmlRenderer</span><span class="p">(</span><span class="n">MapRenderer</span><span class="p">):</span></pre></div>
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<a class='octothorpe' href='#section-2'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">render</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_init_kml_canvas</span><span class="p">()</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_store_layers_kml</span><span class="p">()</span></pre></div>
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<a class='octothorpe' href='#section-3'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
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<span class="n">outfile</span> <span class="o">=</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s">'w'</span><span class="p">)</span>
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<span class="kn">from</span> <span class="nn">lxml</span> <span class="kn">import</span> <span class="n">etree</span>
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<span class="n">outfile</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">etree</span><span class="o">.</span><span class="n">tostring</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">kml</span><span class="p">,</span> <span class="n">pretty_print</span><span class="o">=</span><span class="bp">True</span><span class="p">))</span></pre></div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">preview</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="s">'tmp.kml'</span><span class="p">)</span>
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<span class="kn">from</span> <span class="nn">subprocess</span> <span class="kn">import</span> <span class="n">call</span>
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<span class="n">call</span><span class="p">([</span><span class="s">"open"</span><span class="p">,</span> <span class="s">"tmp.kml"</span><span class="p">])</span></pre></div>
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<a class='octothorpe' href='#section-5'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">_init_kml_canvas</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">kml</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">kml</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">Document</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">name</span><span class="p">(</span><span class="s">'kartograph map'</span><span class="p">)</span>
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<span class="p">)</span>
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<span class="p">)</span></pre></div>
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</div>
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<div class='section' id='section-6'>
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<a class='octothorpe' href='#section-6'>#</a>
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<p>store features in kml (projected to WGS84 latlon)</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">_store_layers_kml</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
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</div>
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<div class='section' id='section-7'>
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<a class='octothorpe' href='#section-7'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="kn">from</span> <span class="nn">pykml.factory</span> <span class="kn">import</span> <span class="n">KML_ElementMaker</span> <span class="k">as</span> <span class="n">KML</span>
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<span class="k">for</span> <span class="n">layer</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">map</span><span class="o">.</span><span class="n">layers</span><span class="p">:</span>
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">layer</span><span class="o">.</span><span class="n">features</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
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<span class="k">continue</span> <span class="c"># ignore empty layers</span>
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<span class="n">g</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">Folder</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">name</span><span class="p">(</span><span class="nb">id</span><span class="p">)</span>
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<span class="p">)</span>
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<span class="k">for</span> <span class="n">feat</span> <span class="ow">in</span> <span class="n">layer</span><span class="o">.</span><span class="n">features</span><span class="p">:</span>
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<span class="n">g</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_render_feature</span><span class="p">(</span><span class="n">feat</span><span class="p">,</span> <span class="n">layer</span><span class="o">.</span><span class="n">options</span><span class="p">[</span><span class="s">'attributes'</span><span class="p">]))</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">kml</span><span class="o">.</span><span class="n">Document</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">g</span><span class="p">)</span></pre></div>
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<a class='octothorpe' href='#section-8'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">_render_feature</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">feature</span><span class="p">,</span> <span class="n">attributes</span><span class="o">=</span><span class="p">[]):</span>
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<span class="n">path</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_render_geometry</span><span class="p">(</span><span class="n">feature</span><span class="o">.</span><span class="n">geometry</span><span class="p">)</span>
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<span class="n">pm</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">Placemark</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">name</span><span class="p">(</span><span class="nb">unicode</span><span class="p">(</span><span class="n">feature</span><span class="o">.</span><span class="n">props</span><span class="p">[</span><span class="n">attributes</span><span class="p">[</span><span class="mi">0</span><span class="p">][</span><span class="s">'src'</span><span class="p">]])),</span>
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<span class="n">path</span>
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<span class="p">)</span>
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<span class="n">xt</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">ExtendedData</span><span class="p">()</span>
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<span class="k">for</span> <span class="n">cfg</span> <span class="ow">in</span> <span class="n">attributes</span><span class="p">:</span>
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<span class="k">if</span> <span class="s">'src'</span> <span class="ow">in</span> <span class="n">cfg</span><span class="p">:</span>
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<span class="k">if</span> <span class="n">cfg</span><span class="p">[</span><span class="s">'src'</span><span class="p">]</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">feature</span><span class="o">.</span><span class="n">props</span><span class="p">:</span>
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<span class="k">continue</span></pre></div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-9'>
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<a class='octothorpe' href='#section-9'>#</a>
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<p>raise KartographError(('attribute not found "%s"'%cfg['src']))</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">val</span> <span class="o">=</span> <span class="n">feature</span><span class="o">.</span><span class="n">props</span><span class="p">[</span><span class="n">cfg</span><span class="p">[</span><span class="s">'src'</span><span class="p">]]</span>
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<span class="kn">import</span> <span class="nn">unicodedata</span>
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<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
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<span class="n">val</span> <span class="o">=</span> <span class="nb">unicode</span><span class="p">(</span><span class="n">val</span><span class="p">,</span> <span class="n">errors</span><span class="o">=</span><span class="s">'ignore'</span><span class="p">)</span>
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<span class="n">val</span> <span class="o">=</span> <span class="n">unicodedata</span><span class="o">.</span><span class="n">normalize</span><span class="p">(</span><span class="s">'NFKD'</span><span class="p">,</span> <span class="n">val</span><span class="p">)</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s">'ascii'</span><span class="p">,</span> <span class="s">'ignore'</span><span class="p">)</span>
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<span class="n">xt</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">KML</span><span class="o">.</span><span class="n">Data</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">value</span><span class="p">(</span><span class="nb">unicode</span><span class="p">(</span><span class="n">val</span><span class="p">)),</span>
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<span class="n">name</span><span class="o">=</span><span class="n">cfg</span><span class="p">[</span><span class="s">'tgt'</span><span class="p">]</span>
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<span class="p">))</span>
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<span class="k">elif</span> <span class="s">'where'</span> <span class="ow">in</span> <span class="n">cfg</span><span class="p">:</span>
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<span class="n">src</span> <span class="o">=</span> <span class="n">cfg</span><span class="p">[</span><span class="s">'where'</span><span class="p">]</span>
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<span class="n">tgt</span> <span class="o">=</span> <span class="n">cfg</span><span class="p">[</span><span class="s">'set'</span><span class="p">]</span>
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">cfg</span><span class="p">[</span><span class="s">'equals'</span><span class="p">])</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">cfg</span><span class="p">[</span><span class="s">'to'</span><span class="p">]):</span>
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<span class="k">raise</span> <span class="n">KartographError</span><span class="p">(</span><span class="s">'attributes: "equals" and "to" arrays must be of same length'</span><span class="p">)</span>
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<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">cfg</span><span class="p">[</span><span class="s">'equals'</span><span class="p">])):</span>
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<span class="k">if</span> <span class="n">feature</span><span class="o">.</span><span class="n">props</span><span class="p">[</span><span class="n">src</span><span class="p">]</span> <span class="o">==</span> <span class="n">cfg</span><span class="p">[</span><span class="s">'equals'</span><span class="p">][</span><span class="n">i</span><span class="p">]:</span>
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<span class="n">xt</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">KML</span><span class="o">.</span><span class="n">Data</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">value</span><span class="p">(</span><span class="n">cfg</span><span class="p">[</span><span class="s">'to'</span><span class="p">][</span><span class="n">i</span><span class="p">]),</span>
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<span class="n">name</span><span class="o">=</span><span class="n">tgt</span>
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<span class="p">))</span>
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<span class="n">pm</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">xt</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">pm</span></pre></div>
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</div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-10'>
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<div class='octowrap'>
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<a class='octothorpe' href='#section-10'>#</a>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">_render_geometry</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">geometry</span><span class="p">):</span>
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<span class="kn">from</span> <span class="nn">shapely.geometry</span> <span class="kn">import</span> <span class="n">Polygon</span><span class="p">,</span> <span class="n">MultiPolygon</span>
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<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">geometry</span><span class="p">,</span> <span class="p">(</span><span class="n">Polygon</span><span class="p">,</span> <span class="n">MultiPolygon</span><span class="p">)):</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_render_polygon</span><span class="p">(</span><span class="n">geometry</span><span class="p">)</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="k">raise</span> <span class="n">KartographError</span><span class="p">(</span><span class="s">'kml-renderer is not fully implemented yet'</span><span class="p">)</span></pre></div>
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</div>
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</div>
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<div class='section' id='section-11'>
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<a class='octothorpe' href='#section-11'>#</a>
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<p>renders a Polygon or MultiPolygon as KML node</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">_render_polygon</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">geometry</span><span class="p">):</span></pre></div>
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<a class='octothorpe' href='#section-12'>#</a>
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</div>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">geoms</span> <span class="o">=</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">geometry</span><span class="p">,</span> <span class="s">'geoms'</span><span class="p">)</span> <span class="ow">and</span> <span class="n">geometry</span><span class="o">.</span><span class="n">geoms</span> <span class="ow">or</span> <span class="p">[</span><span class="n">geometry</span><span class="p">]</span>
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<span class="n">kml_polys</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">geom</span> <span class="ow">in</span> <span class="n">geoms</span><span class="p">:</span>
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<span class="n">poly</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">Polygon</span><span class="p">(</span>
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<span class="n">KML</span><span class="o">.</span><span class="n">tesselate</span><span class="p">(</span><span class="s">"1"</span><span class="p">)</span>
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<span class="p">)</span>
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<span class="n">outer</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">outerBoundaryIs</span><span class="p">()</span>
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<span class="n">coords</span> <span class="o">=</span> <span class="s">''</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">geom</span><span class="o">.</span><span class="n">exterior</span><span class="o">.</span><span class="n">coords</span><span class="p">:</span>
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<span class="n">coords</span> <span class="o">+=</span> <span class="s">','</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="nb">str</span><span class="p">,</span> <span class="n">pt</span><span class="p">))</span> <span class="o">+</span> <span class="s">' '</span>
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<span class="n">outer</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">KML</span><span class="o">.</span><span class="n">LinearRing</span><span class="p">(</span>
|
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<span class="n">KML</span><span class="o">.</span><span class="n">coordinates</span><span class="p">(</span><span class="n">coords</span><span class="p">)</span>
|
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<span class="p">))</span>
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<span class="n">poly</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">outer</span><span class="p">)</span>
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<span class="n">inner</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">innerBoundaryIs</span><span class="p">()</span>
|
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<span class="k">for</span> <span class="n">hole</span> <span class="ow">in</span> <span class="n">geom</span><span class="o">.</span><span class="n">interiors</span><span class="p">:</span>
|
|
<span class="n">coords</span> <span class="o">=</span> <span class="s">''</span>
|
|
<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">hole</span><span class="o">.</span><span class="n">coords</span><span class="p">:</span>
|
|
<span class="n">coords</span> <span class="o">+=</span> <span class="s">','</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="nb">map</span><span class="p">(</span><span class="nb">str</span><span class="p">,</span> <span class="n">pt</span><span class="p">))</span> <span class="o">+</span> <span class="s">' '</span>
|
|
<span class="n">inner</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">KML</span><span class="o">.</span><span class="n">LinearRing</span><span class="p">(</span>
|
|
<span class="n">KML</span><span class="o">.</span><span class="n">coordinates</span><span class="p">(</span><span class="n">coords</span><span class="p">)</span>
|
|
<span class="p">))</span>
|
|
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">inner</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
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|
<span class="n">poly</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">inner</span><span class="p">)</span>
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<span class="n">kml_polys</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">poly</span><span class="p">)</span>
|
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">kml_polys</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
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<span class="k">return</span> <span class="n">kml_polys</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
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<span class="n">multigeometry</span> <span class="o">=</span> <span class="n">KML</span><span class="o">.</span><span class="n">MultiGeometry</span><span class="p">()</span>
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<span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="n">kml_polys</span><span class="p">:</span>
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<span class="n">multigeometry</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
|
|
<span class="k">return</span> <span class="n">multigeometry</span>
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</pre></div>
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</div>
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</div>
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<div class='clearall'></div>
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</div>
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</body>
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