public static void Run()
{
//ExStart: ExportSpatialReferenceSystemToWKT
var parameters = new ProjectedSpatialReferenceSystemParameters
{
Name = "WGS 84 / World Mercator",
Base = SpatialReferenceSystem.Wgs84,
ProjectionMethodName = "Mercator_1SP",
LinearUnit = Unit.Meter,
XAxis = new Axis("Easting", AxisDirection.East),
YAxis = new Axis("Northing", AxisDirection.North),
AxisesOrder = ProjectedAxisesOrder.XY,
};
parameters.AddProjectionParameter("central_meridian", 0);
parameters.AddProjectionParameter("scale_factor", 1);
parameters.AddProjectionParameter("false_easting", 0);
parameters.AddProjectionParameter("false_northing", 0);
var projectedSrs = SpatialReferenceSystem.CreateProjected(parameters, Identifier.Epsg(3395));
string wkt = projectedSrs.ExportToWkt();
Console.WriteLine(wkt);
//ExEnd: ExportSpatialReferenceSystemToWKT
}
public static void Run()
{
string dataDir = RunExamples.GetDataDir();
//ExStart: CreateVectorLayerWithSpatialReferenceSystem
var parameters = new ProjectedSpatialReferenceSystemParameters
{
Name = "WGS 84 / World Mercator",
Base = SpatialReferenceSystem.Wgs84,
ProjectionMethodName = "Mercator_1SP",
LinearUnit = Unit.Meter,
XAxis = new Axis("Easting", AxisDirection.East),
YAxis = new Axis("Northing", AxisDirection.North),
AxisesOrder = ProjectedAxisesOrder.XY,
};
parameters.AddProjectionParameter("central_meridian", 0);
parameters.AddProjectionParameter("scale_factor", 1);
parameters.AddProjectionParameter("false_easting", 0);
parameters.AddProjectionParameter("false_northing", 0);
var projectedSrs = SpatialReferenceSystem.CreateProjected(parameters, Identifier.Epsg(3395));
using (var layer = Drivers.Shapefile.CreateLayer(dataDir + "filepath_out.shp", new ShapefileOptions(), projectedSrs))
{
var feature = layer.ConstructFeature();
feature.Geometry = new Point(1, 2);
layer.Add(feature);
feature = layer.ConstructFeature();
feature.Geometry = new Point(1, 2)
{
SpatialReferenceSystem = SpatialReferenceSystem.Nad83
};
try
{
layer.Add(feature); // geometry of feature has different SRS - exception is thrown
}
catch (GisException e)
{
Console.WriteLine(e.Message);
}
}
using (var layer = Drivers.Shapefile.OpenLayer(dataDir + "filepath_out.shp"))
{
var srsName = layer.SpatialReferenceSystem.Name; // "WGS 84 / World Mercator"
layer.SpatialReferenceSystem.IsEquivalent(projectedSrs); // true
}
//ExEnd: CreateVectorLayerWithSpatialReferenceSystem
}