Setting Maximum Scale in Silverlight App

Question

Hello, My co-worker and I are developing a Silverlight application containing two base maps. One of the basemaps is Esri's World Street map: http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer . The other basemap contains imagery I cached. With the imagery basemap, the map will zoom into a scale greater than the cache and there will just be a blank background. Does anyone have suggestions on how I can limit the Silverlight app's scale? I need it to NOT zoom into a larger scale than the imagery base map. Please see DesiredMaxScale.PNG, containing the scale I want to be the maximum zoom level, and CurrentMaxScale.PNG, which displays the empty base map. (A vector map service is overlaid in both of these maps.) Here is part of the page from my XAML: I am a beginner with Silverlight. Thank you for your suggestions. Regards, Patty [ATTACH=CONFIG]30346[/ATTACH][ATTACH=CONFIG]30347[/ATTACH] DesiredMaxScale.PNG CurrentMaxScale.PNG test.png ArcGISProScreen.png Screenshot 2025-09-26 122722.png JamesPoeschel_0-1758911294012.png

PattyJula · Answer

Thanks, Brett and Rich. I ended up removing the largest scale from my imagery cache - which I hadn't/don't need to tile. This took care of the problem of a blank background. Your feedback is useful reference.

Regards,
Patty

Anonymous User · Answer

Original User: rzwaap

Hi Patty:

You can use the Map Scale Settings add-in to define the maximum scale.  You can download the add-in at the following link: http://www.arcgis.com/home/item.html?id=0b2c8fcac5624bdd92f9fef15fdb96ef.

brettangel · Answer

You could create a behavior that doesn't allow the MapApplication.Current.Map.Scale to get below a certain value similar to the constainExtent behavior.        private void OnExtentChanged(object s, ExtentEventArgs args)
        {
            if MapApplication.Current.Map.Scale < 1500
            {
             code to zoom to scale here
            }
        }

Something like this maybe.