How to limit how far in the user can zoom with the Navigation control

[CharlotteCrawford]

Hi all,

I am trying to figure out how to limit how far in the user can zoom.  I believe it is something to do with the map resolution, is this correct?  How would I set it up so that the user can only zoom in to half the distance that they can by default?

Thanks
CC

[SanajyJadhav]

I am assuming you want to put constraint on the map extent.

You can look at 'Constrain Extent Behavior' sample to do this.Here is the documentation for the same.

Hope this helps.

[DominiqueBroux]

I am trying to figure out how to limit how far in the user can zoom. I believe it is something to do with the map resolution, is this correct?

Right. you have to set or increase the minimum resolution of the map.

If your map has already a minimum resolution (that's the case if your map contains a tiled layer), you can use code like this one to increase it:

 
public MainPage()
{
  InitializeComponent();
  MyMap.Layers.LayersInitialized += ChangeMapResolution;
}
void ChangeMapResolution(object sender, System.EventArgs args)
{
  MyMap.MinimumResolution *= 2;
}

[CharlotteCrawford]

Thanks very much, I'll try it

CC