public void Reproject_DifferentCoordinateSystems_ReprojectImageAndMetaData()
{
// Setup
var mapArgs = new MapArgs(new Rectangle(0, 0, 722, 349),
new Extent(520981.864447542, 6853700.54100246, 709995.365081098, 6945065.79269375));
ProjectionInfo sourceProjection = ProjectionInfo.FromEpsgCode(25831);
ProjectionInfo targetProjection = KnownCoordinateSystems.Projected.World.WebMercator;
var projector = new TileReprojector(mapArgs, sourceProjection, targetProjection);
var sourceReference = new WorldFile(140, 0.0, 0.0, -140, 641716.59261121, 5825498);
Bitmap sourceTile = Resources.source;
WorldFile targetReference;
Bitmap targetTile;
// Call
projector.Reproject(sourceReference, sourceTile, out targetReference, out targetTile);
// Assert
// Note: These ground truth values have been defined using https://github.com/FObermaier/DotSpatial.Plugins/blob/master/DotSpatial.Plugins.BruTileLayer/Reprojection/TileReprojector.cs
Assert.AreEqual(261.791552124038, targetReference.A11, 1e-8);
Assert.AreEqual(0.0, targetReference.A21);
Assert.AreEqual(0.0, targetReference.A12);
Assert.AreEqual(-261.79155212403651, targetReference.A22, 1e-8);
Assert.AreEqual(564962.84520438069, targetReference.B1, 1e-8);
Assert.AreEqual(6902131.9781454066, targetReference.B2, 1e-8);
TestHelper.AssertImagesAreEqual(Resources.target, targetTile);
}
private void DrawTile(MapArgs args, TileInfo info, Resolution resolution, byte[] buffer, TileReprojector tr = null)
{
if (buffer == null || buffer.Length == 0)
{
return;
}
tr = tr ?? new TileReprojector(args, _sourceProjection, _targetProjection);
using (var bitmap = (Bitmap)Image.FromStream(new MemoryStream(buffer)))
{
var inWorldFile = new WorldFile(resolution.UnitsPerPixel, 0,
0, -resolution.UnitsPerPixel,
info.Extent.MinX, info.Extent.MaxY);
WorldFile outWorldFile;
Bitmap outBitmap;
tr.Reproject(inWorldFile, bitmap, out outWorldFile, out outBitmap);
if (outWorldFile == null)
{
return;
}
var lt = args.ProjToPixel(outWorldFile.ToGround(0, 0));
var rb = args.ProjToPixel(outWorldFile.ToGround(outBitmap.Width, outBitmap.Height));
var rect = new Rectangle(lt, Size.Subtract(new Size(rb), new Size(lt)));
args.Device.DrawImage(outBitmap, rect, 0, 0, outBitmap.Width, outBitmap.Height,
GraphicsUnit.Pixel, _imageAttributes);
if (outBitmap != bitmap)
{
outBitmap.Dispose();
}
if (FrameTile)
{
if (FramePen != null)
{
args.Device.DrawRectangle(FramePen, rect);
}
}
}
}
public void Reproject_SameProjection_ReturnSourceMaterial()
{
// Setup
ProjectionInfo projection = KnownCoordinateSystems.Projected.NationalGrids.Rijksdriehoekstelsel;
var mapArgs = new MapArgs(new Rectangle(), new Extent());
var projector = new TileReprojector(mapArgs, projection, projection);
var sourceReference = new WorldFile(1.0, 0.0, 0.0, -1.0, 0.0, 0.0);
Bitmap sourceTile = Resources.testImage;
WorldFile targetReference;
Bitmap targetTile;
// Call
projector.Reproject(sourceReference, sourceTile, out targetReference, out targetTile);
// Assert
Assert.AreSame(sourceReference, targetReference);
Assert.AreSame(sourceTile, targetTile);
}
public void Reproject_TargetTileWouldNotBeVisibleInViewport_ReturnNull()
{
// Setup
ProjectionInfo sourceProjection = KnownCoordinateSystems.Projected.NationalGrids.Rijksdriehoekstelsel;
ProjectionInfo targetProjection = KnownCoordinateSystems.Projected.World.WebMercator;
var mapArgs = new MapArgs(new Rectangle(0, 0, 10, 10), new Extent(5, 50, 10, 100));
var projector = new TileReprojector(mapArgs, sourceProjection, targetProjection);
var sourceReference = new WorldFile(1.0, 0.0, 0.0, -1.0, 0.0, 0.0);
Bitmap sourceTile = Resources.testImage;
WorldFile targetReference;
Bitmap targetTile;
// Call
projector.Reproject(sourceReference, sourceTile, out targetReference, out targetTile);
// Assert
Assert.IsNull(targetReference);
Assert.IsNull(targetTile);
}