/// <summary>
/// Ogr to DotSpatial at layer level
/// </summary>
/// <param name="layer">Ogr Layer</param>
/// <returns>DotSpatial IFeatureSet</returns>
public static DotSpatial.Data.IFeatureSet Ogr2DSLayer(OSGeo.OGR.Layer layer)
{
DotSpatial.Data.IFeatureSet featureSet = new DotSpatial.Data.FeatureSet();
featureSet.FeatureType = Ogr2DSGeometryType(layer.GetGeomType());
featureSet.DataTable = Ogr2DSDataTable(layer.GetLayerDefn());
featureSet.Projection = Ogr2DSProjection(layer.GetSpatialRef());
for (int i = 0; i < layer.GetFeatureCount(0); i++)
{
OSGeo.OGR.Geometry geometry = layer.GetFeature(i).GetGeometryRef();
DotSpatial.Data.IFeature feature = new DotSpatial.Data.Feature(Ogr2DSGeometry(geometry));
OSGeo.OGR.Feature ogrFeature = layer.GetFeature(i);
feature.DataRow = featureSet.DataTable.NewRow();
for (int j = 0; j < layer.GetLayerDefn().GetFieldCount(); j++)
{
object value = GetOgrValue(ogrFeature, j);
if (value == null)
{
value = DBNull.Value;
}
feature.DataRow[j] = value;
}
featureSet.Features.Add(feature);
}
return(featureSet);
}
public static DotSpatial.Data.FeatureSet Execute(DotSpatial.Data.Raster rst, ContourType contourType, string FieldName = "Value", double[] levels = null)
{
double[] lev = levels;
noData = rst.NoDataValue;
type = contourType;
DotSpatial.Data.Raster iRst = RasterCheck(rst, lev);;
string field;
if (FieldName == null)
{
field = "Value";
}
else
{
field = FieldName;
}
double[] x = new double[rst.NumColumns];
double[] y = new double[rst.NumRows];
for (int i = 0; i < rst.NumColumns; i++)
{
x[i] = rst.Extent.MinX + rst.CellWidth * i + rst.CellWidth / 2;
}
for (int i = 0; i < rst.NumRows; i++)
{
y[i] = rst.Extent.MaxY - rst.CellHeight * i - rst.CellHeight / 2;
}
DotSpatial.Data.FeatureSet fs = null;
switch (type)
{
case ContourType.Line:
{
fs = new DotSpatial.Data.FeatureSet(DotSpatial.Topology.FeatureType.Line);
fs.DataTable.Columns.Add(field, typeof(double));
for (int z = 0; z < levels.Length; z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
var f = (DotSpatial.Data.Feature)fs.AddFeature(ToDotSpatialLineString((ILineString)g));
f.DataRow[field] = lev[z];
}
}
}
break;
case ContourType.Polygon:
{
fs = new DotSpatial.Data.FeatureSet(DotSpatial.Topology.FeatureType.Polygon);
fs.DataTable.Columns.Add("Lev", typeof(int));
fs.DataTable.Columns.Add("Label", typeof(string));
Collection <IGeometry> Contours = new Collection <IGeometry>();
for (int z = 0; z < levels.Count(); z++)
{
IList <IGeometry> cont = GetContours(ref iRst, x, y, lev[z]);
foreach (var g in cont)
{
Contours.Add(new LineString(g.Coordinates));
}
}
Coordinate[] Boundary = new Coordinate[5];
Boundary[0] = new Coordinate(x[0], y[0]);
Boundary[1] = new Coordinate(x[0], y[rst.NumRows - 1]);
Boundary[2] = new Coordinate(x[rst.NumColumns - 1], y[rst.NumRows - 1]);
Boundary[3] = new Coordinate(x[rst.NumColumns - 1], y[0]);
Boundary[4] = new Coordinate(x[0], y[0]);
Contours.Add(new LineString(Boundary));
Collection <IGeometry> NodedContours = new Collection <IGeometry>();
GeometryNoder geomNoder = new GeometryNoder(new PrecisionModel(1000d));
foreach (var c in geomNoder.Node(Contours))
{
NodedContours.Add(c);
}
Polygonizer polygonizer = new Polygonizer();
polygonizer.Add(NodedContours);
foreach (IPolygon p in polygonizer.GetPolygons())
{
Point pnt = (Point)p.InteriorPoint;
int c = (int)((pnt.X - iRst.Extent.MinX) / iRst.CellWidth);
int r = (int)((iRst.Extent.MaxY - pnt.Y) / iRst.CellHeight);
double z = ((DotSpatial.Data.Raster)iRst).Value[r, c];
int Cls = GetLevel(z, lev);
string label = "Undefined";
if (Cls == -1)
{
label = "< " + lev[0].ToString();
}
if (Cls == lev.Count())
{
label = "> " + lev[lev.Count() - 1].ToString();
}
if (Cls >= 0 & Cls < lev.Count())
{
label = lev[Cls].ToString() + " - " + lev[Cls + 1].ToString();
}
DotSpatial.Topology.Polygon dsp = ToDotSpatialPolygon(p);
DotSpatial.Data.Feature f = (DotSpatial.Data.Feature)fs.AddFeature(dsp);
f.DataRow["Lev"] = Cls;
f.DataRow["Label"] = label;
}
}
break;
}
return(fs);
}