/// <summary>Convert a GeoJSON Polygon geometry to Arcgis Geometry </summary>
/// <param name="JSpoint">The deserialised GeoJson Object</param>
/// <param name="epsg">The EPSG-code of the spatial reference, -1 is unknown</param>
/// <returns>A Arcgis Polygon goemetry</returns>
public static IPolygon geojson2esriPolygon(datacontract.geojsonPolygon JSPolygon, int epsg = -1)
{
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory3 spatialReferenceFactory = obj as ISpatialReferenceFactory3;
IGeometryBridge2 pGeoBrg = new GeometryEnvironment() as IGeometryBridge2;
IGeometryCollection esriGeometryCol = new PolygonClass();
for (int n = 0; n < JSPolygon.coordinates.Count; n++)
{
List<List<double>> JSring = JSPolygon.coordinates[n];
IPointCollection4 ring = new RingClass();
ESRI.ArcGIS.esriSystem.WKSPoint[] aWKSPointBuffer = new ESRI.ArcGIS.esriSystem.WKSPoint[JSring.Count];
for (int i = 0; i < JSring.Count; i++)
{
double[] xy = JSring[i].ToArray();
aWKSPointBuffer[i].X = xy[0];
aWKSPointBuffer[i].Y = xy[1];
}
pGeoBrg.SetWKSPoints(ring , aWKSPointBuffer);
esriGeometryCol.AddGeometry(ring as IGeometry, Type.Missing, Type.Missing);
}
IPolygon esriPolygon = esriGeometryCol as IPolygon;
if (epsg != -1)
{
ISpatialReference srs = spatialReferenceFactory.CreateSpatialReference(epsg);
esriPolygon.SpatialReference = srs;
}
return esriPolygon;
}
/// <summary>Convert a GeoJSON Line geometry to Arcgis Geometry </summary>
/// <param name="JSpoint">The deserialised GeoJson Object</param>
/// <param name="epsg">The EPSG-code of the spatial reference, -1 is unknown</param>
/// <returns>A Arcgis PolyLine goemetry</returns>
public static IPolyline geojson2esriLine(datacontract.geojsonLine JSline, int epsg = -1)
{
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
ISpatialReferenceFactory3 spatialReferenceFactory = obj as ISpatialReferenceFactory3;
IGeometryBridge2 pGeoBrg = new GeometryEnvironment() as IGeometryBridge2;
ESRI.ArcGIS.esriSystem.WKSPoint[] aWKSPointBuffer = new ESRI.ArcGIS.esriSystem.WKSPoint[ JSline.coordinates.Count ];
for (int n = 0; n < JSline.coordinates.Count; n++)
{
double[] xy = JSline.coordinates[n].ToArray();
aWKSPointBuffer[n].X = xy[0];
aWKSPointBuffer[n].Y = xy[1];
}
IPolyline esriLine = new PolylineClass();
pGeoBrg.SetWKSPoints(esriLine as IPointCollection4, aWKSPointBuffer);
if (epsg != -1)
{
ISpatialReference srs = spatialReferenceFactory.CreateSpatialReference(epsg);
esriLine.SpatialReference = srs;
}
return esriLine;
}
