private double CalculateDistance(int doc, IState state)
{
var document = _currentIndexReader.Document(doc, state);
if (document == null)
{
return(double.NaN);
}
var field = document.GetField(Constants.Documents.Indexing.Fields.SpatialShapeFieldName);
if (field == null)
{
return(double.NaN);
}
var shapeAsText = field.StringValue(state);
Shape shape;
try
{
shape = _spatialField.ReadShape(shapeAsText);
}
catch (InvalidOperationException)
{
return(double.NaN);
}
var pt = shape as Point;
if (pt == null)
{
pt = shape.GetCenter();
}
return(_spatialField.GetContext().GetDistCalc().Distance(pt, _originPt));
}
private SpatialResult ActuallyCalculateDistance(int doc, IState state)
{
var document = _currentIndexReader.Document(doc, state);
if (document == null)
{
return(SpatialResult.Invalid);
}
var field = document.GetField(Constants.Documents.Indexing.Fields.SpatialShapeFieldName);
if (field == null)
{
return(SpatialResult.Invalid);
}
var shapeAsText = field.StringValue(state);
Shape shape;
try
{
shape = _spatialField.ReadShape(shapeAsText);
}
catch (InvalidOperationException)
{
return(SpatialResult.Invalid);
}
var pt = shape as Point;
if (pt == null)
{
pt = shape.GetCenter();
}
var result = new SpatialResult
{
Latitude = pt.GetY(),
Longitude = pt.GetX()
};
if (_isGeo == false)
{
result.Distance = CartesianDistance(pt.GetY(), pt.GetX(), _originPt.GetY(), _originPt.GetX());
return(result);
}
result.Distance = HaverstineDistanceInMiles(pt.GetY(), pt.GetX(), _originPt.GetY(), _originPt.GetX());
switch (Units)
{
case SpatialUnits.Kilometers:
result.Distance *= DistanceUtils.MILES_TO_KM;
break;
case SpatialUnits.Miles:
default:
break;
}
return(result);
}