/// <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 {
DataType = ras.DataType, 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.Extent.Intersects(output.Extent) == false)
{
return(false);
}
RcIndex start = slopeGrid.ProjToCell(output.Extent.MinX, output.Extent.MaxY);
RcIndex stop = slopeGrid.ProjToCell(output.Extent.MaxX, output.Extent.MinY);
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(string.Empty, 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);
}
/// <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 != FeatureType.Polygon || outerShpFile.FeatureType != FeatureType.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(string.Empty, 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].Geometry.Covers(point.Geometry))
{
continue; // not found the point inside.
}
for (int c = 0; c < poly.Features.Count; c++)
{
if (output.Features[c].Geometry.Covers(point.Geometry))
{
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="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 { DataType = ras.DataType, 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.Extent.Intersects(output.Extent) == false)
{
return false;
}
RcIndex start = slopeGrid.ProjToCell(output.Extent.MinX, output.Extent.MaxY);
RcIndex stop = slopeGrid.ProjToCell(output.Extent.MaxX, output.Extent.MinY);
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(string.Empty, 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;
}
/// <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 != FeatureType.Polygon || outerShpFile.FeatureType != FeatureType.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(string.Empty, 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;
}
