diff --git a/lib/util/geo.cjs b/lib/util/geo.cjs
index 4b9c2d53..a5650075 100644
--- a/lib/util/geo.cjs
+++ b/lib/util/geo.cjs
@@ -1,7 +1,9 @@
 const {range, min, flatten} = require('lodash')
 const {concave, buffer, bbox, bboxPolygon, centroid, feature, featureCollection, truncate, pointOnFeature, booleanPointInPolygon, lineString, pointToLineDistance} = require('@turf/turf')
 const proj = require('@etalab/project-legal')
-const {pointToTile} = require('@mapbox/tilebelt')
+const {pointToTileFraction} = require('@mapbox/tilebelt')
+
+const extent = 4096
 
 function computeBufferedBbox(features, distanceInMeters) {
   if (!features || features.length === 0) {
@@ -73,12 +75,26 @@ function derivePositionProps(position, minZoom, maxZoom) {
     return {lon, lat, x, y}
   }
 
+  const nestedTile = []
   const tiles = range(minZoom, maxZoom + 1).map(zoom => {
-    const [x, y, z] = pointToTile(lon, lat, zoom)
+    const [xf, yf, z] = pointToTileFraction(lon, lat, zoom)
+
+    // Positon theroique
+    const x = Math.floor(xf)
+    const y = Math.floor(yf)
+
+    // Sauf que le rendu est sur mvt v2.1 sur une etendue (extent)
+    const overX = (Math.ceil(xf) - xf) < 1 / (2 * extent)
+    const overY = (Math.ceil(yf) - yf) < 1 / (2 * extent)
+    if (overX || overY) { // L'arrondit du pixel depassera l'etendue
+      console.log(`la position s'affichera sur la tuile suivante ${z}/${overX ? x + 1 : x}/${overY ? y + 1 : y}`)
+      nestedTile.push(`${z}/${overX ? x + 1 : x}/${overY ? y + 1 : y}`)
+    }
+
     return `${z}/${x}/${y}`
   })
 
-  return {lon, lat, x, y, tiles}
+  return {lon, lat, x, y, tiles: [...tiles, ...nestedTile]}
 }
 
 function getRings(polygon) {