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Update GeoApiProjection.cs

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This commit is contained in:
ClemensF 2020-04-19 21:31:31 +02:00
parent b6f33b5c1a
commit 802a5255d7
1 changed files with 13 additions and 7 deletions
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20
MapProjections/Shared/GeoApiProjection.cs
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@ -25,6 +25,7 @@ namespace MapControl.Projections
private ICoordinateSystem coordinateSystem;
private bool isNormalCylindrical;
private bool isWebMercator;
private double scaleFactor;
private string bboxFormat;
public IMathTransform LocationToMapTransform { get; private set; }
@ -64,17 +65,19 @@ namespace MapControl.Projections
var falseNorthing = projection.GetParameter("false_northing");
isNormalCylindrical =
centralMeridian != null && centralMeridian.Value == 0d &&
centralParallel != null && centralParallel.Value == 0d &&
(centralMeridian == null || centralMeridian.Value == 0d) &&
(centralParallel == null || centralParallel.Value == 0d) &&
(falseEasting == null || falseEasting.Value == 0d) &&
(falseNorthing == null || falseNorthing.Value == 0d);
isWebMercator = CrsId == "EPSG:3857" || CrsId == "EPSG:900913";
scaleFactor = 1d;
bboxFormat = "{0},{1},{2},{3}";
}
else
{
isNormalCylindrical = true;
isWebMercator = false;
scaleFactor = Wgs84MetersPerDegree;
bboxFormat = "{1},{0},{3},{2}";
}
}
@ -108,9 +111,10 @@ namespace MapControl.Projections
throw new InvalidOperationException("The CoordinateSystem property is not set.");
}
var coordinate = LocationToMapTransform.Transform(new Coordinate(location.Longitude, location.Latitude));
var coordinate = LocationToMapTransform.Transform(
new Coordinate(location.Longitude, location.Latitude));
return new Point(coordinate.X, coordinate.Y);
return new Point(coordinate.X * scaleFactor, coordinate.Y * scaleFactor);
}
public override Location MapToLocation(Point point)
@ -120,15 +124,17 @@ namespace MapControl.Projections
throw new InvalidOperationException("The CoordinateSystem property is not set.");
}
var coordinate = MapToLocationTransform.Transform(new Coordinate(point.X, point.Y));
var coordinate = MapToLocationTransform.Transform(
new Coordinate(point.X / scaleFactor, point.Y / scaleFactor));
return new Location(coordinate.Y, coordinate.X);
}
public override string GetBboxValue(Rect rect)
{
return string.Format(CultureInfo.InvariantCulture,
bboxFormat, rect.X, rect.Y, (rect.X + rect.Width), (rect.Y + rect.Height));
return string.Format(CultureInfo.InvariantCulture, bboxFormat,
rect.X / scaleFactor, rect.Y / scaleFactor,
(rect.X + rect.Width) / scaleFactor, (rect.Y + rect.Height) / scaleFactor);
}
}
}