public void Test(string sourceResourceName, string targetResourceName, double projectDelta, double unprojectDelta)
{
var sourceData = GoldData.GetReadyReader(sourceResourceName);
var targetData = GoldData.GetReadyReader(targetResourceName);
var sourceCrs = GoldData.GetCrs(sourceData);
var targetCrs = GoldData.GetCrs(targetData);
Assert.IsNotNull(sourceCrs);
Assert.IsNotNull(targetCrs);
var operationGenerator = new HelmertCrsCoordinateOperationPathGenerator();
var operationPath = operationGenerator.Generate(sourceCrs, targetCrs).First();
Assert.IsNotNull(operationPath);
var compiler = new StaticCoordinateOperationCompiler();
var forward = new CompiledConcatenatedTransformation<GeographicCoordinate, Point2>(compiler.Compile(operationPath) as IEnumerable<ITransformation>);
var inverse = forward.GetInverse();
while (sourceData.Read() && targetData.Read()) {
var geogreaphicExpected = sourceData.CurrentLatLon();
var projectedExpected = targetData.CurrentPoint2D();
var projected = forward.TransformValue(geogreaphicExpected);
Assert.AreEqual(projectedExpected.X, projected.X, projectDelta);
Assert.AreEqual(projectedExpected.Y, projected.Y, projectDelta);
var geographic = inverse.TransformValue(projectedExpected);
Assert.AreEqual(geogreaphicExpected.Latitude, geographic.Latitude, unprojectDelta);
Assert.AreEqual(geogreaphicExpected.Longitude, geographic.Longitude, unprojectDelta);
}
}
public HttpResponseMessage Draw(double?minLon, double?maxLon, double?minLat, double?maxLat, int?maxImgWidth, int?maxImgHeight)
{
var shapefilePath = HostingEnvironment.MapPath("~/App_Data/builtupp_usa/builtupp_usa.shp");
ITransformation <GeographicCoordinate, Point2> transformation = null;
var targetCrs = EpsgMicroDatabase.Default.GetCrs(3005);
LongitudeDegreeRange dataLongitudeRange;
Range dataLatitudeRange;
using (var shapeFile = Shapefile.Open(shapefilePath)) {
dataLongitudeRange = new LongitudeDegreeRange(shapeFile.Extent.MinX, shapeFile.Extent.MaxX);
dataLatitudeRange = new Range(shapeFile.Extent.MinY, shapeFile.Extent.MaxY);
var dataCrs = EpsgMicroDatabase.Default.GetCrs(4326);
var pathGenerator = new EpsgCrsCoordinateOperationPathGenerator();
var paths = pathGenerator.Generate(dataCrs, targetCrs);
var compiler = new StaticCoordinateOperationCompiler();
var firstTransfom = paths.Select(p => {
return(compiler.Compile(p));
}).First(x => x != null);
transformation = firstTransfom as ITransformation <GeographicCoordinate, Point2>;
if (transformation == null && firstTransfom is IEnumerable <ITransformation> )
{
transformation = new CompiledConcatenatedTransformation <GeographicCoordinate, Point2>((IEnumerable <ITransformation>)firstTransfom);
}
}
var geoMbrMin = new GeographicCoordinate(minLat ?? dataLatitudeRange.Low, minLon ?? dataLongitudeRange.Start);
var geoMbrMax = new GeographicCoordinate(maxLat ?? dataLatitudeRange.High, maxLon ?? dataLongitudeRange.End);
var geoMbrTL = new GeographicCoordinate(geoMbrMax.Latitude, geoMbrMin.Longitude);
var geoMbrTR = new GeographicCoordinate(geoMbrMin.Latitude, geoMbrMax.Longitude);
var projectedMbrPoints = new[] {
geoMbrMin,
geoMbrMax,
geoMbrTL,
geoMbrTR,
new GeographicCoordinate(geoMbrMin.Latitude, Math.Abs(geoMbrMin.Longitude + geoMbrMax.Longitude) / 2.0)
}
.Select(transformation.TransformValue)
.ToArray();
var projectedExtent = new Mbr(
new Point2(projectedMbrPoints.Min(x => x.X), projectedMbrPoints.Min(x => x.Y)),
new Point2(projectedMbrPoints.Max(x => x.X), projectedMbrPoints.Max(x => x.Y))
);
var geogMapOrigin = new GeographicCoordinate(dataLatitudeRange.Mid, dataLongitudeRange.Mid);
var mapOrigin = transformation.TransformValue(geogMapOrigin);
var mapOffset = new Vector2(0 /*-(mapOrigin.X - projectedExtent.X.Mid)*/, projectedExtent.Height / 2.0);
var imageSizeLimits = new Vector2(maxImgWidth ?? 300, maxImgHeight ?? 300);
if (imageSizeLimits.X > 4096 || imageSizeLimits.Y > 4096)
{
throw new ArgumentException("Image size too large");
}
var dataRatio = new Vector2(projectedExtent.Width / imageSizeLimits.X, projectedExtent.Height / imageSizeLimits.Y);
var lowCorner = projectedExtent.Min;
Vector2 desiredImageSize;
double imageScaleFactor;
if (dataRatio.Y < dataRatio.X)
{
imageScaleFactor = imageSizeLimits.X / projectedExtent.Width;
desiredImageSize = new Vector2(imageSizeLimits.X, (int)(projectedExtent.Height * imageScaleFactor));
}
else
{
imageScaleFactor = imageSizeLimits.Y / projectedExtent.Height;
desiredImageSize = new Vector2((int)(projectedExtent.Width * imageScaleFactor), imageSizeLimits.Y);
}
using (var image = new System.Drawing.Bitmap((int)desiredImageSize.X, (int)desiredImageSize.Y))
using (var graphics = Graphics.FromImage(image)) {
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
var shapeSource = new PointShapefileShapeSource(shapefilePath);
var shapeReader = new ShapeReader(shapeSource);
using (var shapeEnumerator = shapeReader.GetEnumerator()) {
var sourceCoordinates = ReadPagesToGeographicCoordinate(shapeEnumerator).SelectMany(x => x);
var pointColor = Color.Black;
var circleFillBrush = new SolidBrush(Color.FromArgb(64, 16, 64, 128));
var featureRadius = 3.0;
var featureDiameter = featureRadius * 2;
var featureDiameterFloat = (float)featureDiameter;
var topLeftOffset = new Vector2(-featureRadius, -featureRadius);
foreach (var transformedPoint in transformation.TransformValues(sourceCoordinates))
{
var offsetPoint = transformedPoint.Difference(lowCorner).Add(mapOffset);
var scaledPoint = offsetPoint.GetScaled(imageScaleFactor);
var screenPoint = new Point2(scaledPoint.X, image.Height - scaledPoint.Y);
var drawTopLeft = screenPoint.Add(topLeftOffset);
graphics.FillEllipse(circleFillBrush, (float)drawTopLeft.X, (float)drawTopLeft.Y, featureDiameterFloat, featureDiameterFloat);
}
}
var result = new HttpResponseMessage(HttpStatusCode.OK);
byte[] imageBytes;
using (var memoryStream = new MemoryStream()) {
image.Save(memoryStream, ImageFormat.Png);
imageBytes = memoryStream.ToArray();
}
result.Content = new ByteArrayContent(imageBytes);
result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("image/png");
return(result);
}
}
public HttpResponseMessage Draw(double? minLon, double? maxLon, double? minLat, double? maxLat, int? maxImgWidth, int? maxImgHeight)
{
var shapefilePath = HostingEnvironment.MapPath("~/App_Data/builtupp_usa/builtupp_usa.shp");
ITransformation<GeographicCoordinate, Point2> transformation = null;
var targetCrs = EpsgMicroDatabase.Default.GetCrs(3005);
LongitudeDegreeRange dataLongitudeRange;
Range dataLatitudeRange;
using (var shapeFile = Shapefile.Open(shapefilePath)) {
dataLongitudeRange = new LongitudeDegreeRange(shapeFile.Extent.MinX, shapeFile.Extent.MaxX);
dataLatitudeRange = new Range(shapeFile.Extent.MinY, shapeFile.Extent.MaxY);
var dataCrs = EpsgMicroDatabase.Default.GetCrs(4326);
var pathGenerator = new EpsgCrsCoordinateOperationPathGenerator();
var paths = pathGenerator.Generate(dataCrs, targetCrs);
var compiler = new StaticCoordinateOperationCompiler();
var firstTransfom = paths.Select(p => {
return compiler.Compile(p);
}).First(x => x != null);
transformation = firstTransfom as ITransformation<GeographicCoordinate, Point2>;
if (transformation == null && firstTransfom is IEnumerable<ITransformation>)
transformation = new CompiledConcatenatedTransformation<GeographicCoordinate, Point2>((IEnumerable<ITransformation>)firstTransfom);
}
var geoMbrMin = new GeographicCoordinate(minLat ?? dataLatitudeRange.Low, minLon ?? dataLongitudeRange.Start);
var geoMbrMax = new GeographicCoordinate(maxLat ?? dataLatitudeRange.High, maxLon ?? dataLongitudeRange.End);
var geoMbrTL = new GeographicCoordinate(geoMbrMax.Latitude, geoMbrMin.Longitude);
var geoMbrTR = new GeographicCoordinate(geoMbrMin.Latitude, geoMbrMax.Longitude);
var projectedMbrPoints = new[] {
geoMbrMin,
geoMbrMax,
geoMbrTL,
geoMbrTR,
new GeographicCoordinate(geoMbrMin.Latitude, Math.Abs(geoMbrMin.Longitude + geoMbrMax.Longitude) / 2.0)
}
.Select(transformation.TransformValue)
.ToArray();
var projectedExtent = new Mbr(
new Point2(projectedMbrPoints.Min(x => x.X), projectedMbrPoints.Min(x => x.Y)),
new Point2(projectedMbrPoints.Max(x => x.X), projectedMbrPoints.Max(x => x.Y))
);
var geogMapOrigin = new GeographicCoordinate(dataLatitudeRange.Mid, dataLongitudeRange.Mid);
var mapOrigin = transformation.TransformValue(geogMapOrigin);
var mapOffset = new Vector2(0/*-(mapOrigin.X - projectedExtent.X.Mid)*/, projectedExtent.Height / 2.0);
var imageSizeLimits = new Vector2(maxImgWidth ?? 300, maxImgHeight ?? 300);
if (imageSizeLimits.X > 4096 || imageSizeLimits.Y > 4096)
throw new ArgumentException("Image size too large");
var dataRatio = new Vector2(projectedExtent.Width / imageSizeLimits.X, projectedExtent.Height / imageSizeLimits.Y);
var lowCorner = projectedExtent.Min;
Vector2 desiredImageSize;
double imageScaleFactor;
if (dataRatio.Y < dataRatio.X) {
imageScaleFactor = imageSizeLimits.X / projectedExtent.Width;
desiredImageSize = new Vector2(imageSizeLimits.X, (int)(projectedExtent.Height * imageScaleFactor));
}
else {
imageScaleFactor = imageSizeLimits.Y / projectedExtent.Height;
desiredImageSize = new Vector2((int)(projectedExtent.Width * imageScaleFactor), imageSizeLimits.Y);
}
using (var image = new System.Drawing.Bitmap((int)desiredImageSize.X, (int)desiredImageSize.Y))
using (var graphics = Graphics.FromImage(image)) {
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
var shapeSource = new PointShapefileShapeSource(shapefilePath);
var shapeReader = new ShapeReader(shapeSource);
using (var shapeEnumerator = shapeReader.GetEnumerator()) {
var sourceCoordinates = ReadPagesToGeographicCoordinate(shapeEnumerator).SelectMany(x => x);
var pointColor = Color.Black;
var circleFillBrush = new SolidBrush(Color.FromArgb(64,16,64,128));
var featureRadius = 3.0;
var featureDiameter = featureRadius * 2;
var featureDiameterFloat = (float)featureDiameter;
var topLeftOffset = new Vector2(-featureRadius,-featureRadius);
foreach (var transformedPoint in transformation.TransformValues(sourceCoordinates)) {
var offsetPoint = transformedPoint.Difference(lowCorner).Add(mapOffset);
var scaledPoint = offsetPoint.GetScaled(imageScaleFactor);
var screenPoint = new Point2(scaledPoint.X, image.Height - scaledPoint.Y);
var drawTopLeft = screenPoint.Add(topLeftOffset);
graphics.FillEllipse(circleFillBrush, (float)drawTopLeft.X, (float)drawTopLeft.Y, featureDiameterFloat, featureDiameterFloat);
}
}
var result = new HttpResponseMessage(HttpStatusCode.OK);
byte[] imageBytes;
using (var memoryStream = new MemoryStream()) {
image.Save(memoryStream, ImageFormat.Png);
imageBytes = memoryStream.ToArray();
}
result.Content = new ByteArrayContent(imageBytes);
result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("image/png");
return result;
}
}
