var map = L.Map('divmap', {
   crs : L.geoportalCRS.EPSG2154
 }).setView();
 var lyr = L.geoportalLayer.WMTS(
   {
     layer : "ORTHOIMAGERY.ORTHOPHOTOS.BDORTHO.L93"
   });

 lyr.addTo(map); // ou map.addLayer(lyr);

Members

innerEPSG2154L.geoportalCRS.EPSG2154