Bing Map Longitude Latitude Data Binding?

Part of your pasted code is kind of confusing, I could be dense but I don't know what you are using the CollectionViewSource for. Your Longitude and Latitude Properties seem suspicious though. According to the Reference Documentation bm:Map.

Center takes a Location object, which in turn expect Longitude and Latitude as doubles. I am quite certain that binding a source string property to a target double property will not work by default. You will have to specify a value converter.

In your case, just use double for your Longitude and Latitude Properties if possible.

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