<div dir="ltr">Hi,<br><br><div class="" itemprop="text">

        <p>I load an external GeoJSON file into a vector layer and add it to the map:</p>

<pre style class=""><code><span class="">geojson_layer </span><span class="">=</span><span class=""> </span><span class="">new</span><span class=""> </span><span class="">OpenLayers</span><span class="">.</span><span class="">Layer</span><span class="">.</span><span class="">Vector</span><span class="">(</span><span class="">"GeoJSON"</span><span class="">,</span><span class=""> </span><span class="">{</span><span class="">
        strategies</span><span class="">:</span><span class=""> </span><span class="">[</span><span class="">new</span><span class=""> </span><span class="">OpenLayers</span><span class="">.</span><span class="">Strategy</span><span class="">.</span><span class="">Fixed</span><span class="">()],</span><span class="">
        protocol</span><span class="">:</span><span class=""> </span><span class="">new</span><span class=""> </span><span class="">OpenLayers</span><span class="">.</span><span class="">Protocol</span><span class="">.</span><span class="">HTTP</span><span class="">({</span><span class="">
            url</span><span class="">:</span><span class=""> </span><span class="">"json/CS_Fr_St_General.json"</span><span class="">,</span><span class="">
            format</span><span class="">:</span><span class=""> </span><span class="">new</span><span class=""> </span><span class="">OpenLayers</span><span class="">.</span><span class="">Format</span><span class="">.</span><span class="">GeoJSON</span><span class="">()</span><span class="">
        </span><span class="">})</span><span class="">
    </span><span class="">});</span><span class=""> 

olmap</span><span class="">.</span><span class="">addLayer</span><span class="">(</span><span class="">geojson_layer</span><span class="">);</span></code></pre>

<p>When I zoom in or out, the old drawings of the geojson are not removed and the new one is added over it.</p>

<p>I suppose there is a setting in olmap that prevent the geojson to be 
refreshed/redrawn when zooming but I dont know how to fix it.</p>

<p>You can inspect the olmap and the geojson_layer in the debug tool from this address</p>

<p><a href="https://carto48dev.mels.gouv.qc.ca/Infogeo/test/window.html" rel="nofollow">https://carto48dev.mels.gouv.qc.ca/Infogeo/test/window.html</a></p>

<p>Thanks for your help</p>

    -Max Demars<br></div><br></div>