/// <summary>
/// 根据srid创建Projection
/// </summary>
/// <param name="srid"></param>
/// <returns></returns>
public static Crs CreateBySrid(int srid)
{
var coordSys = SridReader.GetCSbyID(srid);
if (coordSys != null)
{
return(new Crs(coordSys));
}
return(null);
}
/// <summary>
/// Gets a coordinate system from the SRID.csv file
/// </summary>
/// <param name="id">EPSG ID</param>
/// <returns>Coordinate system, or null if SRID was not found.</returns>
public static ICoordinateSystem GetCSbyID(int id)
{
//TODO: Enhance this with an index so we don't have to loop all the lines
ICoordinateSystemFactory fac = new CoordinateSystemFactory();
foreach (SridReader.WKTstring wkt in SridReader.GetSRIDs())
{
if (wkt.WKID == id)
{
return(ProjNet.Converters.WellKnownText.CoordinateSystemWktReader.Parse(wkt.WKT) as ICoordinateSystem);
}
}
return(null);
}
public void SetUp()
{
// These files (path 1 and 2 below) do not have to exist regarding the tests they are used.
readerForFilePath1 = new SridReader(@"C:\temp\file1.csv");
readerForFilePath2 = new SridReader(@"C:\temp\file2.csv");
readerForEmbeddedResource1 = new SridReader(new List <EmbeddedResourceFileWithCRSdefinitions> {
EmbeddedResourceFileWithCRSdefinitions.STANDARD_FILE_SHIPPED_WITH_ProjNet
});
readerForEmbeddedResource2 = new SridReader(new List <EmbeddedResourceFileWithCRSdefinitions> {
EmbeddedResourceFileWithCRSdefinitions.SIX_SWEDISH_RT90_CRS_DEFINITIONS_COPIED_FROM_SharpMap_SpatialRefSys_xml
});
readerForEmbeddedResource3 = new SridReader(new List <EmbeddedResourceFileWithCRSdefinitions> {
EmbeddedResourceFileWithCRSdefinitions.STANDARD_FILE_SHIPPED_WITH_ProjNet, EmbeddedResourceFileWithCRSdefinitions.SIX_SWEDISH_RT90_CRS_DEFINITIONS_COPIED_FROM_SharpMap_SpatialRefSys_xml
});
}
private void TestSridReaderForEpsgNumber(
int epsgNumber,
string expectedInitialPartOfWellKnownTextString
)
{
var listWithOnlyTheStandardFile = new List <EmbeddedResourceFileWithCRSdefinitions> {
EmbeddedResourceFileWithCRSdefinitions.STANDARD_FILE_SHIPPED_WITH_ProjNet
};
var sridReader = new SridReader(listWithOnlyTheStandardFile);
//sridReader = new SridReader(@"PATH_TO_FILE\crsTransformations-dotnet\Programmerare.CrsTransformations.Adapter.ProjNet\SRID_ShippedWithProjNet_2_0_0.csv");
CoordinateSystem crs = sridReader.GetCSbyID(epsgNumber);
Assert.IsNotNull(crs);
Assert.AreEqual(
epsgNumber,
crs.AuthorityCode
);
Assert.That(
crs.WKT,
Does.StartWith(expectedInitialPartOfWellKnownTextString)
);
}
protected void Button1_Click(object sender, EventArgs e)
{
lbOutput.Text = "";
int inSRID = 0;
int outSRID = 0;
if (!int.TryParse(tbSRIDin.Text, out inSRID))
{
WriteError("Invalid SRID input number.");
return;
}
if (!int.TryParse(tbSRIDout.Text, out outSRID))
{
WriteError("Invalid SRID output number.");
return;
}
//Get input coordinate system by ID from CSV dataset
ICoordinateSystem csIn = SridReader.GetCSbyID(inSRID);
if (csIn == null)
{
WriteError("Unknown input SRID.");
return;
}
//Get output coordinate system by ID from CSV dataset
ICoordinateSystem csOut = SridReader.GetCSbyID(outSRID);
if (csOut == null)
{
WriteError("Unknown output SRID.");
return;
}
//Create coordinate transformation instance
ICoordinateTransformation trans = null;
try
{
trans = new CoordinateTransformationFactory().CreateFromCoordinateSystems(csIn, csOut);
}
catch (System.Exception ex)
{
WriteError(ex.Message);
return;
}
lbOutput.Text += "<b>Input CS:</b>";
WriteCoordSys(csIn);
lbOutput.Text += "<b>Output CS:</b>";
WriteCoordSys(csOut);
string points = tbPoints.Text;
lbOutput.Text += "<b>Transformed points:</b><br/>";
foreach (string line in points.Split('\n'))
{
//Parse each line and transform the points.
string[] vals = line.Split(',');
if (vals.Length < 2)
{
continue;
}
double x = 0;
double y = 0;
if (!double.TryParse(vals[0], System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out x))
{
WriteError("Error parsing X", true);
continue;
}
if (!double.TryParse(vals[1], System.Globalization.NumberStyles.Any, System.Globalization.CultureInfo.InvariantCulture, out y))
{
WriteError("Error parsing Y", true);
continue;
}
try
{
///Perform transformation
double[] result = trans.MathTransform.Transform(new double[] { x, y });
lbOutput.Text += String.Format(System.Globalization.CultureInfo.InvariantCulture, "{0} , {1}<br/>", result[0], result[1]);
}
catch (System.Exception ex)
{
WriteError(ex.Message, true);
}
}
}
