private void writePx(MapWinGIS.Grid gr, MapWinGIS.GridDataType grType,
GridPixel pix, object val, MapWinGIS.ICallback cback)
{
switch (grType)
{
case GridDataType.ShortDataType:
short v1 = Convert.ToInt16(val);
gr.set_Value(pix.col, pix.row, v1);
break;
case GridDataType.LongDataType:
int v2 = Convert.ToInt32(val);
gr.set_Value(pix.col, pix.row, v2);
break;
case GridDataType.FloatDataType:
float v3 = Convert.ToSingle(val);
gr.set_Value(pix.col, pix.row, v3);
break;
case GridDataType.DoubleDataType:
double v4 = Convert.ToDouble(val);
gr.set_Value(pix.col, pix.row, v4);
break;
default:
reportError("the grid data type " + grType.ToString() + "is not supported.", cback);
break;
}
}
/// <summary>
/// Adds boxes from grid row number rowNum of length length
/// </summary>
/// <param name="grid"></param>
/// <param name="rowNum"></param>
/// <param name="length"></param>
public void addGridRow(MapWinGIS.Grid grid, int rowNum, int length)
{
GridRow gr = new GridRow(grid, rowNum);
addRow(new Row(gr.Row), rowNum, length, (int)((double)grid.Header.NodataValue));
if (gr.readError)
{
lastError = "Grid does not seem to be an integer grid";
}
}
/// <summary>
/// Reprojects a grid
/// </summary>
/// <param name="grid">Grid object to reproject</param>
/// <param name="inPlace">Whether reprojected file should replace the initial one</param>
/// <returns>True on success and false otherwise</returns>
public static TestingResult Reproject(MapWinGIS.Grid grid, out MapWinGIS.Grid gridNew, MapWinGIS.GeoProjection projection, frmTesterReport report)
{
string sourcePrj = grid.Header.GeoProjection.ExportToProj4();
string targetPrj = projection.ExportToProj4();
string origFilename = grid.Filename;
MapWinGIS.ICallback callback = grid.GlobalCallback;
gridNew = null;
LayerSource obj = new LayerSource(grid);
LayerSource objNew = null;
if (CoordinateTransformation.SeekSubstituteFile(obj, projection, out objNew))
{
gridNew = objNew.Grid;
return(TestingResult.Substituted);
}
string newFilename = CoordinateTransformation.FilenameWithProjectionSuffix(origFilename, grid.Header.GeoProjection, projection);
newFilename = CoordinateTransformation.GetSafeNewName(newFilename);
// setting callback
if (report != null)
{
if (!report.Visible)
{
report.InitProgress(projection);
}
report.ShowFilename(grid.Filename);
}
bool result = MapWinGIS.GeoProcess.SpatialReference.ProjectGrid(ref sourcePrj, ref targetPrj, ref origFilename, ref newFilename, true, report);
if (report != null)
{
report.ClearFilename();
}
if (!result)
{
return(TestingResult.Error);
}
// TODO: no need to open it if only a name is supposed to be returned
gridNew = new MapWinGIS.Grid();
gridNew.Open(newFilename, MapWinGIS.GridDataType.UnknownDataType, false, MapWinGIS.GridFileType.UseExtension, callback);
gridNew.AssignNewProjection(projection.ExportToProj4());
return(TestingResult.Ok);
}
public void AddTest12()
{
MapWindow.Interfaces.Layers target = new Layers(); // TODO: Initialize to an appropriate value
MapWinGIS.Grid GridObject = null; // TODO: Initialize to an appropriate value
MapWinGIS.Grid GridObjectExpected = null; // TODO: Initialize to an appropriate value
string LayerName = string.Empty; // TODO: Initialize to an appropriate value
MapWindow.Interfaces.Layer expected = null; // TODO: Initialize to an appropriate value
MapWindow.Interfaces.Layer actual;
actual = target.Add(ref GridObject, LayerName);
Assert.AreEqual(GridObjectExpected, GridObject);
Assert.AreEqual(expected, actual);
Assert.Inconclusive("Verify the correctness of this test method.");
}
private bool Multipoint2Grid(MapWinGIS.Shapefile MultipointSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
//count the number of shapes
int s, p;
MapWinGIS.Shape shp;
MapWinGIS.Point pt;
ArrayList pixels = new ArrayList();
object val;
GridPixel px;
int nShps = MultipointSf.NumShapes;
int nPts = 0;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//get the shape
shp = MultipointSf.get_Shape(s);
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(shp, header))
{
continue;
}
//get the shape's value
val = GetCellValue(MultipointSf, FldID, s, header.NodataValue);
nPts = shp.numPoints;
for (p = 0; p < nPts; ++p)
{
//write pixel values
pt = shp.get_Point(p);
Newgrd.ProjToCell(pt.x, pt.y, out px.col, out px.row);
pixels.Add(px);
writePxList(Newgrd, grType, pixels, val, cback);
}
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
}
return(true);
}
/// <summary>
/// convert point shapefile to grid
/// </summary>
private bool Point2Grid(MapWinGIS.Shapefile PointSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
//count the number of shapes
int s;
MapWinGIS.Shape shp;
MapWinGIS.Point pt = new MapWinGIS.Point();
object val;
GridPixel px;
int nShps = PointSf.NumShapes;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//get the point
shp = PointSf.get_Shape(s);
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(shp, header))
{
continue;
}
if (shp.numPoints > 0)
{
pt = shp.get_Point(0);
if (pt != null)
{
//return the shape's value and write the pixel
val = GetCellValue(PointSf, FldID, s, header.NodataValue);
Newgrd.ProjToCell(pt.x, pt.y, out px.col, out px.row);
writePx(Newgrd, grType, px, val, cback);
}
}
//report the progress
if (s >= shpsPerc)
{
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
}
}
return(true);
}
/// <summary>
/// writes the pixel values from arrayList to grid
/// </summary>
/// <param name="gr"></param>
/// <param name="pxList"></param>
/// <param name="val"></param>
/// <param name="cback"></param>
private void writePxList(MapWinGIS.Grid gr, MapWinGIS.GridDataType grType,
System.Collections.ArrayList pxList, object val, MapWinGIS.ICallback cback)
{
switch (grType)
{
case GridDataType.ShortDataType:
short v1 = Convert.ToInt16(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v1);
}
break;
case GridDataType.LongDataType:
int v2 = Convert.ToInt32(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v2);
}
break;
case GridDataType.FloatDataType:
float v3 = Convert.ToSingle(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v3);
}
break;
case GridDataType.DoubleDataType:
double v4 = Convert.ToDouble(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v4);
}
break;
default:
reportError("the grid data type " + grType.ToString() + "is not supported.", cback);
break;
}
pxList.Clear();
}
/// <summary>
/// populate all the grid cells between two consecutive intersections with shape's value
/// </summary>
private bool ScanLine2(System.Collections.ArrayList vettore, double xref,
ref System.Collections.ArrayList pixels, ref MapWinGIS.Grid gr, MapWinGIS.GridHeader header,
object value, MapWinGIS.ICallback cback)
{
bool result = false;
bool control;
double yll, ystart, yend, ycellstart;
double pxsize;
int c, r, v;
r = 0;
GridPixel curPx;
control = false;
yll = header.YllCenter;
pxsize = header.dX;
ystart = 0;
for (v = vettore.Count - 1; v >= 0; --v)
{
if (control == false)
{
ystart = (double)vettore[v];
control = true;
}
else
{
yend = (double)vettore[v];
ycellstart = FirstLineXY(ystart, yll, pxsize, -1);
do
{
gr.ProjToCell(xref, ycellstart, out c, out r);
curPx.col = c;
curPx.row = r;
pixels.Add(curPx);
ycellstart = ycellstart - pxsize;
}while (ycellstart >= yend);
control = false;
}
}
return(result);
}
/// <summary>
/// Reprojects layer of undefined type
/// </summary>
/// <param name="filename">Filename of layer to reproject. A changed name will be returned when new file was created</param>
/// <param name="projection">New projection</param>
/// <param name="inPlace">Whether new files should be written</param>
/// <param name="report">A reference to report form</param>
/// <returns>True on success and false otherwise</returns>
public static TestingResult ReprojectLayer(LayerSource layer, out LayerSource newLayer, MapWinGIS.GeoProjection projection, frmTesterReport report)
{
newLayer = null;
TestingResult result = TestingResult.Error;
switch (layer.Type)
{
case LayerSourceType.Shapefile:
MapWinGIS.Shapefile sfNew = null;
result = CoordinateTransformation.Reproject(layer.Shapefile, out sfNew, projection, report);
if (sfNew != null)
{
newLayer = new LayerSource(sfNew);
}
break;
case LayerSourceType.Grid:
MapWinGIS.Grid gridNew = null;
result = CoordinateTransformation.Reproject(layer.Grid, out gridNew, projection, report);
if (gridNew != null)
{
newLayer = new LayerSource(gridNew);
}
break;
case LayerSourceType.Image:
MapWinGIS.Image imageNew = null;
result = CoordinateTransformation.Reproject(layer.Image, out imageNew, projection, report);
if (imageNew != null)
{
newLayer = new LayerSource(imageNew);
}
break;
default:
System.Diagnostics.Debug.Print("Coordinate transformation: unsupported interface");
break;
}
return(result);
}
/// <summary>
/// converts a Line shapefile to grid using Bresenham algorithm
/// </summary>
/// <param name="PolySf">Polygon shapefile object</param>
/// <param name="FldID">Field index</param>
/// <param name="Newgrd">New grid object</param>
/// <param name="header">Grid header</param>
/// <param name="nodatavalue"></param>
/// <param name="cback">optional, for reporting progress</param>
/// <returns>true if successful</returns>
private bool Line2Grid(MapWinGIS.Shapefile LineSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
int numParts, numPoints;
int curPartStart, curPartEnd, vertexCol, vertexRow, lastCol, lastRow;
int nShps = LineSf.NumShapes;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
int s = 0; //shape number
int p = 0; //part number
int k = 0; //point number
MapWinGIS.Shape LineShp = new MapWinGIS.Shape();
MapWinGIS.Point curPoint;
//Rasterization ras = new Rasterization(); //rasterization class, contains the code of
//lineToGrid methods independent on MapWinGIS functions
ArrayList vertices = new ArrayList(); //list of line vertex points
ArrayList pixels = new ArrayList(); //list of calculated pixels on the line
GridPixel px;
object val; //the shape's value
for (s = 0; s < nShps; ++s)
{
LineShp = LineSf.get_Shape(s);
numParts = LineShp.NumParts;
numPoints = LineShp.numPoints;
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(LineShp, header))
{
continue;
}
//get the shape's value
val = GetCellValue(LineSf, FldID, s, header.NodataValue);
//process each part of the polyline
curPartStart = 0;
for (p = 0; p < numParts; ++p)
{
vertices.Clear();
pixels.Clear();
curPartStart = LineShp.get_Part(p);
// check for multi-part lines
if (p < numParts - 1)
{
curPartEnd = LineShp.get_Part(p + 1) - 1;
}
else
{
curPartEnd = numPoints - 1;
}
//go to next part if there's zero points
if (numPoints <= 0)
{
continue;
}
// add all points of current part to rasterization list
// always add the first point of the part (convert its coordinates to
// grid row and column)
curPoint = LineShp.get_Point(curPartStart);
Newgrd.ProjToCell(curPoint.x, curPoint.y,
out vertexCol, out vertexRow);
px.col = vertexCol;
px.row = vertexRow;
vertices.Add(px);
lastCol = vertexCol; lastRow = vertexRow;
// add all other points with different grid coordinates
for (k = curPartStart + 1; k <= curPartEnd; ++k)
{
// (check if it has a different row or column than the previous point)
curPoint = LineShp.get_Point(k);
Newgrd.ProjToCell(curPoint.x, curPoint.y,
out vertexCol, out vertexRow);
if (vertexCol != lastCol || vertexRow != lastRow)
{
px.col = vertexCol;
px.row = vertexRow;
vertices.Add(px);
lastCol = vertexCol;
lastRow = vertexRow;
}
}
// convert the polyline and write pixels to grid
LineBresenham(vertices, pixels);
writePxList(Newgrd, grType, pixels, val, cback);
}
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
}
return(true);
}
/// <summary>
/// Handles the opening of map layer files from a file open dialog
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public (bool success, string errMsg) FileOpenHandler(string fileName, string layerName = "", bool reproject = false)
{
var success = false;
var errMsg = "";
var fm = new FileManager();
if (!fm.get_IsSupported(fileName))
{
errMsg = "Datasource isn't supported by MapWinGIS";
}
else
{
var obj = fm.Open(fileName, tkFileOpenStrategy.fosAutoDetect, null);
if (fm.LastOpenIsSuccess)
{
if (fm.LastOpenStrategy == tkFileOpenStrategy.fosVectorLayer)
{
var shapefile = obj as Shapefile;
success = shapefile != null;
if (success)
{
if (reproject)
{
int reprojectCount = 0;
var sf = shapefile.Reproject(MapControl.GeoProjection, reprojectCount);
if (reprojectCount > 0 || sf.NumShapes > 0)
{
shapefile = sf;
}
}
if (AddLayer(shapefile, layerName) < 0)
{
success = false;
errMsg = "Failed to add layer to map";
}
}
}
else if (fm.LastOpenStrategy == tkFileOpenStrategy.fosRgbImage)
{
var folderPath = Path.GetDirectoryName(fileName);
var file = Path.GetFileNameWithoutExtension(fileName);
var ext = Path.GetExtension(fileName);
var prjFile = $@"{folderPath}\{file}.prj";
var worldFile = $@"{folderPath}\{file}.{WorldfileExtension(ext)}";
if (File.Exists(prjFile) || File.Exists(worldFile))
{
var image = obj as MapWinGIS.Image;
success = image != null;
if (success)
{
if (AddLayer(image) < 0)
{
success = false;
errMsg = "Failed to add layer to map";
}
}
}
else
{
errMsg = $"{fileName} does not have a projection or world file";
}
}
else if (fm.LastOpenStrategy == tkFileOpenStrategy.fosDirectGrid ||
fm.LastOpenStrategy == tkFileOpenStrategy.fosProxyForGrid)
{
var grid = new MapWinGIS.Grid();
success = grid.Open(fileName, GridDataType.DoubleDataType, false, GridFileType.UseExtension, null);
if (success)
{
AddLayer(grid, Path.GetFileName(fileName), true, true);
}
}
}
else
{
errMsg = "Failed to open datasource: " + fm.get_ErrorMsg(fm.LastErrorCode);
}
}
if (success)
{
//save directory to the registry
RegistryTools.SaveSetting("FAD3", "LastOpenedLayerDirectory", Path.GetDirectoryName(fileName));
}
return(success, errMsg);
}
/// <summary>
/// 'Copyright (C) 2008 Enrico Antonio Chiaradia, UNIMI
///'This program is free software; you can redistribute it and/or
///'modify it under the terms of the GNU General Public License
///'version 2, 1991 as published by the Free Software Foundation.
///'This program is distributed in the hope that it will be useful,
///'but WITHOUT ANY WARRANTY; without even the implied warranty of
///'MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
///'GNU General Public License for more details.
///'A copy of the full GNU General Public License is available at:
///'http://www.gnu.org/copyleft/gpl.html
///'or from:
///'The Free Software Foundation, Inc., 59 Temple Place - Suite 330,
///'Boston, MA 02111-1307, USA.
///'If you wish to use or incorporate this program (or parts of it) into
///'other software that does not meet the GNU General Public License
///'conditions contact the author to request permission.
///'If you have any question or suggestion, please contact the author.
///'Enrico A. Chiaradia
///'University of Milan
///'Ist. di Idraulica Agraria
///'via Celoria 2
///'20133, Milan, Italy
///'email: [email protected]
/// </summary>
/// <param name="sfPath">the name of the shapefile</param>
/// <param name="resultGridPath">the name of the new grid</param>
/// <param name="gridFileType">file type of the new grid</param>
/// <param name="gridDataType">data format of the new grid</param>
/// <param name="sfValueField">the name of the field that contains data</param>
/// <param name="resultGridHeader">contains information about dimension of the new grid</param>
/// <param name="callback">(optional) reports progress and error messages</param>
/// <returns></returns>
public bool ShapefileToGrid2(string SfNm, string GrdName,
MapWinGIS.GridFileType GrdFileType, MapWinGIS.GridDataType GrdDataType,
string Fldname, MapWinGIS.GridHeader GrdHd,
MapWinGIS.ICallback cback)
{
int i;
bool flg;
string projStr;
//open the shapefile
MapWinGIS.Shapefile MySf = new MapWinGIS.Shapefile();
flg = MySf.Open(SfNm, cback);
if (flg == false)
{
reportError("ERROR in opening shapefile: " + SfNm, cback);
MySf.Close();
return false;
}
//get the handle for the field
MapWinGIS.Field field;
int FldId = -1;
int LayFldNum = MySf.NumFields;
i = 0;
for (i = 0; i < LayFldNum; ++i)
{
field = MySf.get_Field(i);
if (field.Name.ToLower() == Fldname.ToLower())
{
FldId = i;
break;
}
}
if (FldId < 0)
{
reportError("The shapefile " + SfNm + " doesn't have a field " + Fldname, cback);
MySf.Close();
return false;
}
//copy shapefile projection
projStr = MySf.Projection;
if (!MapWinUtility.Strings.IsEmpty(projStr))
{
GrdHd.Projection = projStr;
}
//create a new grid and a new gridheader
MapWinGIS.Grid NewGrd = new MapWinGIS.Grid();
flg = NewGrd.CreateNew(GrdName, GrdHd, GrdDataType, GrdHd.NodataValue, false, GrdFileType, cback);
if (flg == false)
{
reportError("ERROR in grid initialization: " + GrdName, cback);
NewGrd.Close();
MySf.Close();
}
//verify the type of shapefile and call rasterization function
MapWinGIS.ShpfileType SfType = new MapWinGIS.ShpfileType();
SfType = MySf.ShapefileType;
switch (SfType)
{
case ShpfileType.SHP_POLYGON:
case ShpfileType.SHP_POLYGONM:
case ShpfileType.SHP_POLYGONZ:
flg = Poly2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POLYLINE:
case ShpfileType.SHP_POLYLINEM:
case ShpfileType.SHP_POLYLINEZ:
flg = Line2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POINT:
case ShpfileType.SHP_POINTM:
case ShpfileType.SHP_POINTZ:
flg = Point2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_MULTIPOINT:
case ShpfileType.SHP_MULTIPOINTM:
case ShpfileType.SHP_MULTIPOINTZ:
flg = Multipoint2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
default:
reportError("The shapefile type " + SfType.ToString() + "is not supported.", cback);
NewGrd.Close();
MySf.Close();
flg = false;
break;
}
//save and close the grid, close shapefile
NewGrd.Save(GrdName, GrdFileType, cback);
NewGrd.Close();
MySf.Close();
return flg;
}
/// <summary>
/// 'Copyright (C) 2008 Enrico Antonio Chiaradia, UNIMI
///'This program is free software; you can redistribute it and/or
///'modify it under the terms of the GNU General Public License
///'version 2, 1991 as published by the Free Software Foundation.
///'This program is distributed in the hope that it will be useful,
///'but WITHOUT ANY WARRANTY; without even the implied warranty of
///'MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
///'GNU General Public License for more details.
///'A copy of the full GNU General Public License is available at:
///'http://www.gnu.org/copyleft/gpl.html
///'or from:
///'The Free Software Foundation, Inc., 59 Temple Place - Suite 330,
///'Boston, MA 02111-1307, USA.
///'If you wish to use or incorporate this program (or parts of it) into
///'other software that does not meet the GNU General Public License
///'conditions contact the author to request permission.
///'If you have any question or suggestion, please contact the author.
///'Enrico A. Chiaradia
///'University of Milan
///'Ist. di Idraulica Agraria
///'via Celoria 2
///'20133, Milan, Italy
///'email: [email protected]
/// </summary>
/// <param name="sfPath">the name of the shapefile</param>
/// <param name="resultGridPath">the name of the new grid</param>
/// <param name="gridFileType">file type of the new grid</param>
/// <param name="gridDataType">data format of the new grid</param>
/// <param name="sfValueField">the name of the field that contains data</param>
/// <param name="resultGridHeader">contains information about dimension of the new grid</param>
/// <param name="callback">(optional) reports progress and error messages</param>
/// <returns></returns>
public bool ShapefileToGrid2(string SfNm, string GrdName,
MapWinGIS.GridFileType GrdFileType, MapWinGIS.GridDataType GrdDataType,
string Fldname, MapWinGIS.GridHeader GrdHd,
MapWinGIS.ICallback cback)
{
int i;
bool flg;
string projStr;
//open the shapefile
MapWinGIS.Shapefile MySf = new MapWinGIS.Shapefile();
flg = MySf.Open(SfNm, cback);
if (flg == false)
{
reportError("ERROR in opening shapefile: " + SfNm, cback);
MySf.Close();
return(false);
}
//get the handle for the field
MapWinGIS.Field field;
int FldId = -1;
int LayFldNum = MySf.NumFields;
i = 0;
for (i = 0; i < LayFldNum; ++i)
{
field = MySf.get_Field(i);
if (field.Name.ToLower() == Fldname.ToLower())
{
FldId = i;
break;
}
}
if (FldId < 0)
{
reportError("The shapefile " + SfNm + " doesn't have a field " + Fldname, cback);
MySf.Close();
return(false);
}
//copy shapefile projection
projStr = MySf.Projection;
if (!MapWinUtility.Strings.IsEmpty(projStr))
{
GrdHd.Projection = projStr;
}
//create a new grid and a new gridheader
MapWinGIS.Grid NewGrd = new MapWinGIS.Grid();
flg = NewGrd.CreateNew(GrdName, GrdHd, GrdDataType, GrdHd.NodataValue, false, GrdFileType, cback);
if (flg == false)
{
reportError("ERROR in grid initialization: " + GrdName, cback);
NewGrd.Close();
MySf.Close();
}
//verify the type of shapefile and call rasterization function
MapWinGIS.ShpfileType SfType = new MapWinGIS.ShpfileType();
SfType = MySf.ShapefileType;
switch (SfType)
{
case ShpfileType.SHP_POLYGON:
case ShpfileType.SHP_POLYGONM:
case ShpfileType.SHP_POLYGONZ:
flg = Poly2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POLYLINE:
case ShpfileType.SHP_POLYLINEM:
case ShpfileType.SHP_POLYLINEZ:
flg = Line2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POINT:
case ShpfileType.SHP_POINTM:
case ShpfileType.SHP_POINTZ:
flg = Point2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_MULTIPOINT:
case ShpfileType.SHP_MULTIPOINTM:
case ShpfileType.SHP_MULTIPOINTZ:
flg = Multipoint2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
default:
reportError("The shapefile type " + SfType.ToString() + "is not supported.", cback);
NewGrd.Close();
MySf.Close();
flg = false;
break;
}
//save and close the grid, close shapefile
NewGrd.Save(GrdName, GrdFileType, cback);
NewGrd.Close();
MySf.Close();
return(flg);
}
public int AddLayer(MapWinGIS.Grid grid, bool visible)
{
return(base.AddLayer(grid, visible));
}
/// <summary>
/// This function converts a polygon shapefile to grid. It implements the line-scan algorithm.
/// <param name="PolySf">The polygon shapefile</param>
/// <param name="FldID">The field index</param>
/// <param name="Newgrd">File name of the new grid</param>
/// <param name="header">Header object of the new grid</param>
/// <param name="writePxDeleg">Delegate function for writing the grid pixels</param>
/// <param name="nodatavalue">'no data' value</param>
/// <param name="cback">can be used to report progress (optional)</param>
/// <returns>true if successful</returns>
//
// AUTHOR NAME: Enrico A. Chiaradia
// FROM: University of Milan (Italy)
// e.mail: [email protected]
//
// For details about the line-scan algorithm,
// please refer to http://www.profc.udec.cl/~gabriel/tutoriales/giswb/vol1/cp3/cp3-6.htm
//
// for each shape in PolySf
// 0) get the shape value (in the shapefile table)
// 1) load all the borders in a matrix composed by x(startpoint), x(endpoint), slope and share
// 2) define x of first scan line
// for each scan lines
// 3) calculate intersections with polygon border
// 4) sort intersections from lower Y to the higther
// 5) convert line space between two consecutive intersection to raster
private bool Poly2Grid(MapWinGIS.Shapefile PolySf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType,
MapWinGIS.ICallback cback)
{
double xMin, xMax;
double x0, x1, x2, y0, y1, y2, m, q;
int nShps, nVs, i, s, nP, p, tempn, v, b;
object val;
bool flg;
bord brd; //struct to keep a border
System.Collections.ArrayList bordi2; //list of borders
int perc = 1; //percent shapes done
int shpsPerc;
MapWinGIS.Shape PolyShp; //the polygon shape
//count the number of shapes
nShps = PolySf.NumShapes;
shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//for each shape, determine the extent and the number of parts
i = 0;
PolyShp = PolySf.get_Shape(s);
nP = PolyShp.NumParts;
xMin = PolyShp.Extents.xMin;
//yMin = PolyShp.Extents.yMin;
xMax = PolyShp.Extents.xMax;
//yMax = PolyShp.Extents.yMax;
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(PolyShp, header))
{
continue;
}
//return the shape's value
val = GetCellValue(PolySf, FldID, s, header.NodataValue);
//load polygon borders
nVs = PolyShp.numPoints - 1;
bordi2 = new System.Collections.ArrayList(nVs + 1);
b = -1;
tempn = 0;
for (p = 0; p < nP; ++p)
{
x0 = PolyShp.get_Point(tempn).x;
y0 = PolyShp.get_Point(tempn).y;
for (v = tempn; v < nVs; ++v)
{
x1 = PolyShp.get_Point(v).x;
x2 = PolyShp.get_Point(v + 1).x;
y1 = PolyShp.get_Point(v).y;
y2 = PolyShp.get_Point(v + 1).y;
if (x1 != x2) // no vertical lines
{
m = (y2 - y1) / (x2 - x1);
q = y1 - (m * x1);
//add border to the list
b = b + 1;
brd = new bord();
brd.x1 = x1;
brd.x2 = x2;
brd.m = m;
brd.q = q;
bordi2.Add(brd);
}
//in case of multi-parts polygon
if ((x2 == x0) && (y2 == y0))
{
tempn = v + 2;
break;
}
} //Next v
} // next p
//define the first line-scan
double xstart;
// 20 nov 07 added by Enrico A. Chiaradia
//necessary if grid extentions differ from shapefile extentions
if (xMin >= header.XllCenter)
{
xstart = FirstLineXY(xMin, header.XllCenter, header.dX, 1);
}
else
{
xstart = FirstLineXY(xMin, header.XllCenter, header.dX, -1);
}
// the list of intersection y-values
System.Collections.ArrayList y_int = new System.Collections.ArrayList();
System.Collections.ArrayList pixels = new System.Collections.ArrayList();
do
{
flg = Interseca(bordi2, y_int, xstart);
flg = SortArray(y_int);
flg = ScanLine2(y_int, xstart, ref pixels, ref Newgrd, header, val, cback);
xstart = xstart + header.dX;
}while (xstart <= xMax);
writePxList(Newgrd, grType, pixels, val, cback);
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
} // next shape
reportProgress(100, 100, "shapefile to grid", cback); //100 % shapes done
return(true);
}
public void PopulateForm(bool ShowAfterward, MapWinGIS.Grid grid, string layerName, MapWinGIS.Extents ex, int LyrHandle)
{
m_HavePanel = !ShowAfterward;
try
{
SetTitle(layerName);
MapWinGIS.Extents extents = null;
//clear the list view
dgv.DataSource = null;
System.Data.DataSet ds = new System.Data.DataSet();
ds.Tables.Add();
ds.Tables[0].Columns.Add("Value", typeof(string));
ds.Tables[0].Columns.Add("Count", typeof(long));
if (m_hDraw != -1)
{
m_parent.m_MapWin.View.Draw.ClearDrawing(m_hDraw);
m_hDraw = -1;
}
//recalculates the extents if needed
extents = GetMaxExtents(ex, grid.Header);
extents = ex;
if (extents != null)
{
//set the map cursor to a wait cursor
MapWinGIS.tkCursor m_PreviousCursor = m_parent.m_MapWin.View.MapCursor;
m_parent.m_MapWin.View.MapCursor = MapWinGIS.tkCursor.crsrWait;
//populate all the values and counts
PopulateLV(ref ds, grid, extents, LyrHandle);
//set the cursor back to the Identifier cursor
m_parent.m_MapWin.View.MapCursor = m_PreviousCursor;
}
else
{
lbHighValue.Text = "No Data";
lbLowValue.Text = "No Data";
}
SkipDisplayValues = true;
if (m_hDraw != -1)
{
m_parent.m_MapWin.View.Draw.ClearDrawing(m_hDraw);
}
dgv.DataSource = ds.Tables[0];
if (dgv.SelectedRows.Count > 0)
{
dgv.SelectedRows[0].Selected = false;
}
SkipDisplayValues = false;
m_Extents = extents;
m_Grid = grid;
if (ShowAfterward)
{
this.Show();
}
}
catch (System.Exception exception)
{
ShowErrorBox("PopulateForm()", exception.Message);
}
}
public GridRow(MapWinGIS.Grid grid, int rowNum)
{
this.grid = grid;
this.rowNum = rowNum;
}
public void Unitialize()
{
m_parent.m_MapWin.View.Draw.ClearDrawing(m_hDraw);
m_Grid = null;
m_hDraw = -1;
}
