/// <summary>
/// Finds the average slope in the given polygons with more user preferences.
/// </summary>
/// <param name="ras">The dem Raster(Grid file).</param>
/// <param name="inZFactor">The scaler factor</param>
/// <param name="slopeInPercent">The slope in percentage.</param>
/// <param name="poly">The flow poly shapefile path.</param>
/// <param name="fldInPolyToStoreSlope">The field name to store average slope in the attribute.</param>
/// <param name="outerShpFile">The Featureset where we have the area of interest</param>
/// <param name="outerShpIndex">The index of featureset which give paticular area of interest.</param>
/// <param name="output">The path to save created slope Feature set.</param>
/// <param name="cancelProgressHandler">The progress handler.</param>
/// <returns></returns>
public bool Execute(IRaster ras, double inZFactor, bool slopeInPercent, IFeatureSet poly, string fldInPolyToStoreSlope, IFeatureSet outerShpFile, int outerShpIndex, IFeatureSet output, ICancelProgressHandler cancelProgressHandler)
{
//Validates the input and output data
if (ras == null || poly == null || outerShpFile == null || output == null)
{
return false;
}
if (poly.FeatureType != FeatureTypes.Polygon || outerShpFile.FeatureType != FeatureTypes.Polygon)
return false;
int previous = 0;
IRaster slopegrid = new Raster();
int[] areaCount = new int[poly.Features.Count];
double[] areaTotal = new double[poly.Features.Count];
double[] areaAve = new double[poly.Features.Count];
Slope(ras, inZFactor, slopeInPercent, slopegrid, cancelProgressHandler);
if (slopegrid == null)
throw new SystemException(TextStrings.Slopegridfileisnull);
foreach (IFeature f in poly.Features)
output.Features.Add(f);
for (int i = 0; i < slopegrid.NumRows; i++)
{
int current = Convert.ToInt32(Math.Round(i * 100D / slopegrid.NumRows));
//only update when increment in percentage
if (current > previous+5)
{
cancelProgressHandler.Progress("", current, current + TextStrings.progresscompleted);
previous = current;
}
for (int j = 0; j < slopegrid.NumColumns; j++)
{
Coordinate coordin = slopegrid.CellToProj(i, j);
IPoint pt = new Point(coordin);
IFeature point = new Feature(pt);
if (!outerShpFile.Features[outerShpIndex].Covers(point))
continue;//not found the point inside.
for (int c = 0; c < poly.Features.Count; c++)
{
if (output.Features[c].Covers(point))
{
areaCount[c]++;
areaTotal[c] += slopegrid.Value[i, j] / 100;
}
if (cancelProgressHandler.Cancel)
return false;
}
}
}
//Add the column
output.DataTable.Columns.Add("FID", typeof(int));
output.DataTable.Columns.Add(fldInPolyToStoreSlope, typeof(Double));
for (int c = 0; c < output.Features.Count; c++)
{
if (areaCount[c] == 0)
areaAve[c] = 0.0;
else
areaAve[c] = areaTotal[c] / areaCount[c];
//Add the field values
output.Features[c].DataRow["FID"] = c;
output.Features[c].DataRow[fldInPolyToStoreSlope] = areaAve[c];
}
output.SaveAs(output.Filename,true);
slopegrid.Close();
ras.Close();
return true;
}
/// <summary>
/// Finds the average slope in the given polygons.
/// </summary>
/// <param name="gridIn">The Polygon Raster(Grid file).</param>
/// <param name="polyOut">The Polygon shapefile path.</param>
/// <param name="progress">The progress handler.</param>
public bool Execute(IRaster gridIn, IFeatureSet polyOut, ICancelProgressHandler cancelProgressHandler)
{
//Validates the input and output data
if (gridIn == null || polyOut == null)
{
return false;
}
int maxX, maxY;
int current = 0;
int previous = 0;
double noData, currVal, currTrack;
string strTrackPath;
IRaster gridTrack = new Raster();
maxX = gridIn.NumRows - 1;
maxY = gridIn.NumColumns - 1;
noData = gridIn.NoDataValue;
//strTrackPath = System.IO.Path.GetDirectoryName(strInRast) + "\\" + System.IO.Path.GetFileNameWithoutExtension(strInRast) + "_track.bgd";
gridTrack = Raster.Create("gridTrack.bgd", "", gridIn.NumColumns, gridIn.NumRows, 1, gridIn.DataType, new string[] { "" });
//gridTrack.CreateNew("gridTrack", "", gridIn.NumColumns, gridIn.NumRows, 1, gridIn.DataType, new string[] { "" });
gridTrack.Bounds = gridIn.Bounds;
gridTrack.NoDataValue = gridIn.NoDataValue;
polyOut.DataTable.Columns.Add("Value", typeof(int));
polyOut.DataTable.Columns.Add("Zone", typeof(string));
polyOut.DataTable.Columns.Add("Area", typeof(double));
polyOut.DataTable.Columns.Add("COMID", typeof(string));
polyOut.DataTable.Columns.Add("AveSlope", typeof(double));
for (int i = 0; i <= maxX; i++)
{
current = Convert.ToInt32(i * 100 / maxX);
//only update when increment in percentage
if (current > previous+5)
{
cancelProgressHandler.Progress("", current, current.ToString() + "% progress completed");
previous = current;
}
for (int j = 0; j <= maxY; j++)
{
if (i > 0 && j > 0)
{
currVal = Convert.ToInt16(gridIn.Value[i, j]);
currTrack = Convert.ToInt16(gridTrack.Value[i, j]);
if (currVal == gridIn.NoDataValue)
{
gridTrack.Value[i, j] = 1;
if (cancelProgressHandler.Cancel == true)
return false;
}
else
{
if (currTrack == 1)
{
}
else
{
formPolyFromCell(gridIn, gridTrack, i, j, polyOut, cancelProgressHandler);
if (cancelProgressHandler.Cancel == true)
return false;
}
}
}
else
{
gridTrack.Value[i, j] = gridIn.NoDataValue;
}
}
}
gridIn.Close();
gridTrack.Close();
polyOut.SaveAs(polyOut.Filename, true);
polyOut.Close();
return true;
}
/// <summary>
/// Finds the average slope in the given polygons.
/// </summary>
/// <param name="ras">The dem Raster(Grid file).</param>
/// <param name="zFactor">The scaler factor</param>
/// <param name="poly">The flow poly shapefile path.</param>
/// <param name="output">The resulting DEM of slopes</param>
/// <param name="cancelProgressHandler">The progress handler.</param>
public bool Execute(IRaster ras, double zFactor, IFeatureSet poly, IFeatureSet output, ICancelProgressHandler cancelProgressHandler)
{
//Validates the input and output data
if (ras == null || poly == null || output == null)
{
return false;
}
output.FeatureType = poly.FeatureType;
foreach (IFeature f in poly.Features)
output.Features.Add(f);
output.DataTable.Columns.Add("FID", typeof(int));
output.DataTable.Columns.Add(TextStrings.AveSlope, typeof(Double));
IRaster slopeGrid = new Raster();
slopeGrid.DataType = ras.DataType;
slopeGrid.Bounds = ras.Bounds;
//FeatureSet polyShape = new FeatureSet();
int previous = 0;
if (Slope(ref ras, zFactor, false, ref slopeGrid, cancelProgressHandler) == false)
return false;
int shapeCount = output.Features.Count;
int[] areaCount = new int[shapeCount];
double[] areaTotal = new double[shapeCount];
double[] areaAve = new double[shapeCount];
double dxHalf = slopeGrid.CellWidth / 2;
double dyHalf = slopeGrid.CellHeight / 2;
//check whether those two envelope are intersect
if (ras.Bounds.Envelope.Intersects(output.Envelope) == false)
return false;
RcIndex start = slopeGrid.ProjToCell(output.Envelope.Minimum.X, output.Envelope.Maximum.Y);
RcIndex stop = slopeGrid.ProjToCell(output.Envelope.Maximum.X, output.Envelope.Minimum.Y);
int rowStart = start.Row;
int colStart = start.Column;
int rowStop = stop.Row;
int colStop = stop.Column;
for (int row = rowStart - 1; row < rowStop + 1; row++)
{
int current = Convert.ToInt32((row - rowStart + 1) * 100.0 / (rowStop + 1 - rowStart + 1));
//only update when increment in percentage
if (current > previous + 5)
{
cancelProgressHandler.Progress("", current, current + TextStrings.progresscompleted);
previous = current;
}
for (int col = colStart - 1; col < colStop + 1; col++)
{
Coordinate cent = slopeGrid.CellToProj(row, col);
double xCent = cent.X;
double yCent = cent.Y;
for (int shpindx = 0; shpindx < output.Features.Count; shpindx++)
{
IFeature tempFeat = output.Features[shpindx];
Point pt1 = new Point(xCent, yCent);
Point pt2 = new Point(xCent - dxHalf, yCent - dyHalf);
Point pt3 = new Point(xCent + dxHalf, yCent - dyHalf);
Point pt4 = new Point(xCent + dxHalf, yCent + dyHalf);
Point pt5 = new Point(xCent - dxHalf, yCent + dyHalf);
if ((((!tempFeat.Covers(pt1) && !tempFeat.Covers(pt2)) && !tempFeat.Covers(pt3)) &&
!tempFeat.Covers(pt4)) && !tempFeat.Covers(pt5)) continue;
areaCount[shpindx]++;
areaTotal[shpindx] += slopeGrid.Value[row, col] / 100;
if (cancelProgressHandler.Cancel)
return false;
}
}
}
for (int shpindx = 0; shpindx < output.Features.Count; shpindx++)
{
if (areaCount[shpindx] == 0)
{
areaAve[shpindx] = 0;
}
else
{
areaAve[shpindx] = areaTotal[shpindx] / areaCount[shpindx];
}
output.Features[shpindx].DataRow["FID"] = shpindx;
output.Features[shpindx].DataRow[TextStrings.AveSlope] = areaAve[shpindx];
}
poly.Close();
slopeGrid.Close();
output.SaveAs(output.Filename,true);
return true;
}
