private float GetPointSize(GeoCanvas canvas)
{
// Calculate the size of the points in pixel based on the world point size and the current extent.
//Gets the proper point size according to the current extent. (meter is used as base unit)
double canvasSizeMeter;
double pointSizeMeter = Conversion.ConvertMeasureUnits(pointSize, pointSizeUnit, DistanceUnit.Meter);
//if the mapunit is in Decimal Degrees, it uses a different logic than with other mapunits such as meters and feet.
if (canvas.MapUnit == GeographyUnit.DecimalDegree)
{
try
{
canvasSizeMeter = DecimalDegreesHelper.GetDistanceFromDecimalDegrees(canvas.CurrentWorldExtent.UpperLeftPoint.X,
canvas.CurrentWorldExtent.UpperLeftPoint.Y, canvas.CurrentWorldExtent.LowerLeftPoint.X, canvas.CurrentWorldExtent.LowerLeftPoint.Y, DistanceUnit.Meter);
}
catch { canvasSizeMeter = DecimalDegreesHelper.GetDistanceFromDecimalDegrees(180, 90, 180, -90, DistanceUnit.Meter); }
finally { }
}
else
{
DistanceUnit fromUnit = DistanceUnit.Meter;
if (canvas.MapUnit == GeographyUnit.Feet)
{
fromUnit = DistanceUnit.Feet;
}
canvasSizeMeter = Conversion.ConvertMeasureUnits(canvas.CurrentWorldExtent.Height, fromUnit, DistanceUnit.Meter);
}
float size = (float)((pointSizeMeter * canvas.Height) / canvasSizeMeter);
return(size);
}
internal static double GetEvaluatedDistance(Vertex point1, PointShape point2)
{
return(DecimalDegreesHelper.GetDistanceFromDecimalDegrees(new PointShape(point1), point2, DistanceUnit.Meter));
}