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142 lines
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<li class="toctree-l1"><a class="reference internal" href="funda.html">Scraping Funda</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#using-the-google-api">Using the Google API</a></li>
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<section id="google-maps-api">
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<h1>Google Maps API<a class="headerlink" href="#google-maps-api" title="Permalink to this heading"></a></h1>
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<p><code class="docutils literal notranslate"><span class="pre">Google</span> <span class="pre">Maps</span></code> has a <em>free</em> api that can be used to calculate distance matrixes as well as show point on a map.
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In order to use this API you will need to request an API key from the <a class="reference external" href="https://cloud.google.com/">google cloud console</a>.</p>
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<p>This API can be used at a cost for each request, but Google gives ~200 dollars worth of request at the start of every month.</p>
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<section id="using-the-google-api">
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<h2>Using the Google API<a class="headerlink" href="#using-the-google-api" title="Permalink to this heading"></a></h2>
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<p>For a quick test to see if it was possible to geolocate each house and calculate the distance. For this a simple python script was used.</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">origin_locations</span> <span class="o">=</span> <span class="p">{</span>
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<span class="s2">"nfi_location"</span> <span class="p">:</span> <span class="p">(</span><span class="mf">52.044867266861466</span><span class="p">,</span> <span class="mf">4.3585175985355225</span><span class="p">),</span>
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<span class="s2">"hoogstraat_location"</span> <span class="p">:</span> <span class="p">(</span><span class="mf">52.08725689123654</span><span class="p">,</span> <span class="mf">5.147180442716177</span><span class="p">),</span>
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<span class="s2">"bakkersdijk_location"</span> <span class="p">:</span> <span class="p">(</span><span class="mf">51.85802695253161</span><span class="p">,</span> <span class="mf">4.482033956202426</span><span class="p">),</span>
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<span class="s2">"korhoen_location"</span> <span class="p">:</span> <span class="p">(</span><span class="mf">52.5219455005375</span><span class="p">,</span> <span class="mf">5.732514040876346</span><span class="p">),</span>
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<span class="s2">"harde_location"</span> <span class="p">:</span> <span class="p">(</span><span class="mf">52.41650138296019</span><span class="p">,</span> <span class="mf">5.870995170999243</span><span class="p">)</span>
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<span class="p">}</span>
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<span class="k">def</span> <span class="nf">get_distances</span><span class="p">(</span><span class="n">out_dict</span><span class="p">,</span> <span class="n">destination_location</span><span class="p">):</span>
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<span class="k">for</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">origin_locations</span><span class="p">:</span>
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<span class="n">distance</span> <span class="o">=</span> <span class="n">gmaps</span><span class="o">.</span><span class="n">distance_matrix</span><span class="p">(</span><span class="n">origin_locations</span><span class="p">[</span><span class="n">key</span><span class="p">],</span> <span class="n">destination_location</span><span class="p">,</span> <span class="n">mode</span> <span class="o">=</span> <span class="s1">'driving'</span><span class="p">)</span>
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<span class="n">out_dict</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">distance</span><span class="p">[</span><span class="s1">'rows'</span><span class="p">][</span><span class="mi">0</span><span class="p">][</span><span class="s1">'elements'</span><span class="p">][</span><span class="mi">0</span><span class="p">]</span>
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</pre></div>
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</div>
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<p>We can do about 40.000 request for free each month. With about 1200 houses and 6 requests per house that would mean up to 7000 requests.
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That is enough to build a quick PoC to see if this method would work.</p>
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<img alt="_images/poc_houses_on_maps.png" src="_images/poc_houses_on_maps.png" />
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<p>This works and a lot of houses are shown on google maps with markers.</p>
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</section>
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<section id="google-ban">
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<h2>Google Ban<a class="headerlink" href="#google-ban" title="Permalink to this heading"></a></h2>
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<p>Another result of this action was a Ban from google.
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The reason for this was that I did not read the terms of use.
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You are allowed to do 40K requests for free every month, just not several thousand in a few minutes. Oops.</p>
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<img alt="_images/ban_google.png" src="_images/ban_google.png" />
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<p>Because we want to do more than 40k requests and dont want to pay for these requests, the project was switched to <strong>O</strong>pen <strong>S</strong>treet <strong>M</strong>ap(OSM)</p>
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