Hi list,<br><br>I&#39;m showing some vector features on my map, which come from a GeoJson file.<br>In this GeoJson, features have an id, which is not a&nbsp;standard attribute ... for instance:<br>{<br>           &quot;type&quot;: &quot;Feature&quot;,<br>
           &quot;id&quot;: &quot;1&quot;,<br>           &quot;geometry&quot;: {<br>               &quot;type&quot;: &quot;Point&quot;,<br>               &quot;coordinates&quot;: [613100, 2003000]<br>           },<br>           &quot;properties&quot;: {<br>
               &quot;post80&quot;: &quot;true&quot;,<br>               &quot;precise&quot;: &quot;true&quot;<br>           }<br>       }<br><br>As a result, OL features inherit this id as a &quot;fid&quot; property.<br> <br>
For some reason, I have to clone these&nbsp;features.&nbsp;<br>I&nbsp;was&nbsp;surprised&nbsp;to&nbsp;see&nbsp;that&nbsp;&quot;fid&quot;&nbsp;property is&nbsp;not&nbsp;copied&nbsp;(it becomes &quot;null&quot; in the cloned feature).<br> <br>The reason lies&nbsp;around&nbsp;line&nbsp;100 in Vector.js : <br>
* Method: clone<br>     * Create a clone of this vector feature.  Does not set any non-standard properties.<br><br>I guess I have no other solution&nbsp;to&nbsp;move&nbsp;the&nbsp;id&nbsp;parameter&nbsp;inside&nbsp;the&nbsp;geojson &quot;properties&quot; object.<br>
<br>F.<br><br>