Changing the scale step for double click and mouse wheel events.

src/components/slippy/mouse-handler.tsx

@@ -95,7 +95,7 @@ const MouseHandler: react.FC<MouseHandlerProps> = (
     genericHandler(event);
     dispatch(
       mapActions.scale({
-        factor: 2,
+        factor: Math.SQRT2,
         center: { x: event.pageX, y: event.pageY },
       })
     );

src/components/slippy/wheel-handler.tsx

@@ -47,7 +47,7 @@ const WheelHandler: react.FC<WheelHandlerProps> = (
     ) {
       dispatch(
         mapActions.scale({
-          factor: event.deltaY > 0 ? 2 : 0.5,
+          factor: event.deltaY > 0 ? Math.SQRT2 : Math.SQRT1_2,
           center: { x: event.pageX, y: event.pageY },
         })
       );