If possible, will return the best available low value of the series for a given world coordinate.
            
            
            
            
        
            Parameters
- world
 
- The world coordinate for which to get the value for.
 - useInterpolation
 
- If true, interpolation should be used to get in-between values, rather than only the actual values in the data set.
 - skipUnknowns
 
- If true, unknown values will be skipped when searching for a series value.
 
            
            Return Value
The value in question, or double.NaN if no valid value is available.
 
            
            
            
            
            Target Platforms: Android 4.4+, iOS 8+
Development Environments: Visual Studio 2015+, Visual Studio for Mac Preview, Xamarin for Visual Studio 4.2+