diff --git a/src/components/map/tile.tsx b/src/components/map/tile.tsx
index 99772df..f530021 100644
--- a/src/components/map/tile.tsx
+++ b/src/components/map/tile.tsx
@@ -27,7 +27,7 @@ export const tileProviders: any = {
   osmfr: {
     name: 'Open Street Map France',
     minZoom: 0,
-    maxZoom: 19,
+    maxZoom: 20,
     getTileUrl: (zoom: number, x: number, y: number) =>
       'https://' +
       getRandomItem(abc) +
@@ -41,8 +41,8 @@ export const tileProviders: any = {
   },
   otm: {
     name: 'Open Topo Map',
-    minZoom: 0,
-    maxZoom: 19,
+    minZoom: 2,
+    maxZoom: 17,
     getTileUrl: (zoom: number, x: number, y: number) =>
       'https://' +
       getRandomItem(abc) +
@@ -68,7 +68,24 @@ export const tileProviders: any = {
       '/' +
       y +
       '.png',
-  },
+  }, 
+  //https://b.tile.openstreetmap.fr/openriverboatmap/20/535762/382966.png
+  openriverboatmap: {
+    name: 'Open River Boat Map',
+    minZoom: 0,
+    maxZoom: 20,
+    getTileUrl: (zoom: number, x: number, y: number) =>
+      'https://' +
+      getRandomItem(abc) +
+      '.tile.openstreetmap.fr/openriverboatmap/' +
+      zoom +
+      '/' +
+      x +
+      '/' +
+      y +
+      '.png',
+  }, 
+
   // cyclosmlite: {
   //   name: 'CyclOSM lite',
   //   minZoom: 0,
diff --git a/src/components/slippy/wheel-handler.tsx b/src/components/slippy/wheel-handler.tsx
index 9bd5fad..652a18b 100644
--- a/src/components/slippy/wheel-handler.tsx
+++ b/src/components/slippy/wheel-handler.tsx
@@ -42,7 +42,7 @@ const WheelHandler: react.FC<WheelHandlerProps> = (
     ) {
       dispatch(
         mapActions.scale({
-          factor: event.deltaY > 0 ? Math.SQRT2 : Math.SQRT1_2,
+          factor: event.deltaY < 0 ? Math.SQRT2 : Math.SQRT1_2,
           center: { x: event.pageX, y: event.pageY },
         })
       );