option value="RdYlBu">RdYlBu</option><option value="Greys">Greys</option></select>\
                    Nombre d\'intervalles : <select name="interval_number" id="interval_number-select" oninput="render ()"></select>'
                    document.getElementById('rendering_parameters').appendChild(div);
                    colorsValue ();
                } else if (document.getElementById('map_type-select').value === 'heatmap') {
                    var div = document.createElement('div');
                  