/// <summary>
/// Exports the shapes from the inputSF which fall within the given polygon, saving to the resultSF provided.
/// </summary>
/// <returns>False if an error occurs, true otherwise.</returns>
public static bool SelectPointsWithPolygon(ref MapWinGIS.Shapefile inputSF, ref MapWinGIS.Shape polygon, ref MapWinGIS.Shapefile resultSF, bool SkipMWShapeID)
{
MapWinGIS.Utils utils = new MapWinGIS.UtilsClass();
int numPoints = inputSF.NumShapes;
int shpIndex = 0;
if (Globals.CopyFields(ref inputSF, ref resultSF) == false)
{
return(false);
}
for (int i = 0; i <= numPoints - 1; i++)
{
MapWinGIS.Point currPt = new MapWinGIS.PointClass();
currPt = inputSF.QuickPoint(i, 0);
if (utils.PointInPolygon(polygon, currPt))
{
shpIndex = resultSF.NumShapes;
if (resultSF.EditInsertShape(inputSF.get_Shape(i), ref shpIndex) == false)
{
gErrorMsg = "Problem inserting shape into result file: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
return(false);
}
//add the table values
int numFields = resultSF.NumFields;
for (int j = 0; j <= numFields - 1; j++)
{
if (resultSF.EditCellValue(j, shpIndex, inputSF.get_CellValue(j, i)) == false)
{
gErrorMsg = "Problem inserting value into DBF table: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
return(false);
}
} //end of looping through table
} //end of checking if point is inside polygon
} //end of looping through points
if (resultSF.NumShapes > 0)
{
if (resultSF.NumFields == 0 || !SkipMWShapeID)
{
//add the ID field and values
if (Globals.DoInsertIDs(ref resultSF) == false)
{
return(false);
}
}
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Returns the shape indexes of the shapes falling within the specified polygon.
/// </summary>
/// <returns>False if an error occurs, true otherwise.</returns>
public static bool SelectPointsWithPolygon(ref MapWinGIS.Shapefile inputSF, ref MapWinGIS.Shape polygon, ref System.Collections.ArrayList results)
{
results = new System.Collections.ArrayList();
MapWinGIS.Utils utils = new MapWinGIS.UtilsClass();
int numPoints = inputSF.NumShapes;
for (int i = 0; i <= numPoints - 1; i++)
{
MapWinGIS.Point currPt = new MapWinGIS.PointClass();
currPt = inputSF.QuickPoint(i, 0);
if (utils.PointInPolygon(polygon, currPt))
{
results.Add(i);
} //end of checking if point is inside polygon
} //end of looping through points
return(results.Count > 0);
}
private void AddLayer()
{
MapWinGIS.Shapefile shpfileOpen;
string[] fileNombres;
MapWinGIS.Grid grid;
MapWinGIS.GridColorScheme gridScheme;
MapWinGIS.Image image;
MapWinGIS.Utils utils;
OpenFileDialog openDlg = new OpenFileDialog();
openDlg.Multiselect = true;
int handle;
string ext;
//initialize dialog
openDlg.Filter = "Supported Formats|*.shp;*.bgd;*asc;*.jpg|Shapefile (*.shp)|*.shp|Binary Grids (*.bgd)|*.bgd|ASCII Grids (*.asc)|*.asc |World File (*.jpg)|*.jpg";
openDlg.CheckFileExists = true;
if (openDlg.ShowDialog(this) == DialogResult.OK)
{
fileNombres = openDlg.FileNames;
int totalNombres = fileNombres.Length;
for (int j = 0; j < totalNombres; j++)
{
//get the extension of the file
ext = System.IO.Path.GetExtension(openDlg.FileNames[j]);
if (ext == ".bgd" || ext == ".asc" || ext == ".jpg")
{
if (ext == ".jpg")
{
image = new MapWinGIS.Image();
// open image world file
image.Open(openDlg.FileNames[j], MapWinGIS.ImageType.JPEG_FILE, true, null);
handle = legend1.Layers.Add(image, true);
legend1.Map.set_LayerName(handle, System.IO.Path.GetFileNameWithoutExtension(image.Filename));
//handle = axMap1.AddLayer(image, true);
handleMap.Add(handle);
}
else
{
utils = new MapWinGIS.UtilsClass();
gridScheme = new MapWinGIS.GridColorScheme();
grid = new MapWinGIS.GridClass();
//open the grid
grid.Open(openDlg.FileName, MapWinGIS.GridDataType.UnknownDataType, true, MapWinGIS.GridFileType.UseExtension, null);
//create a coloring scheme for the image
gridScheme.UsePredefined(System.Convert.ToDouble(grid.Minimum), System.Convert.ToDouble(grid.Maximum), MapWinGIS.PredefinedColorScheme.SummerMountains);
//convert the grid to a image
image = utils.GridToImage(grid, gridScheme, null);
//add the image to the legend and map
handle = axMap1.AddLayer(image, true);
handleMap.Add(handle);
grid.Close();
//utils = new MapWinGIS.UtilsClass();
//gridScheme = new MapWinGIS.GridColorScheme();
//grid = new MapWinGIS.GridClass();
////open the grid
//grid.Open(openDlg.FileName, MapWinGIS.GridDataType.UnknownDataType, true, MapWinGIS.GridFileType.UseExtension, null);
////create a coloring scheme for the image
//gridScheme.UsePredefined(System.Convert.ToDouble(grid.Minimum), System.Convert.ToDouble(grid.Maximum), MapWinGIS.PredefinedColorScheme.SummerMountains);
////convert the grid to a image
//image = utils.GridToImage(grid, gridScheme, null);
////add the image to the legend and map
//handle = axMap1.AddLayer(image, true);
////handle = legend1.Layers.Add(image, true);
//if (legend1.Layers.IsValidHandle(handle))
//{
// //set the layer name
// legend1.Map.set_LayerName(handle, System.IO.Path.GetFileNameWithoutExtension(grid.Filename));
// //set's the legend layer type, this displays a default icon in the legend (line shapefile, point shapefile,polygon shapefile,grid,image)
// legend1.Layers.ItemByHandle(handle).Type = MapWindow.Interfaces.eLayerType.Grid;
// //set coloring scheme
// //when applying a coloring scheme to a shapfile use axMap1.ApplyLegendColors(ShapefileColorScheme)
// //when applying a coloring scheme for a grid or image use axMap1.SetImageLayerColorScheme(handle,GridColorScheme);
// axMap1.SetImageLayerColorScheme(legend1.SelectedLayer, gridScheme);
// legend1.Layers.ItemByHandle(legend1.SelectedLayer).Refresh();
//}
//close the grid
//grid.Close();
}
}
else if (ext == ".shp")
{
shpfileOpen = new MapWinGIS.ShapefileClass();
//open the shapefile
shpfileOpen.Open(openDlg.FileNames[j], null);
//add the shapefile to the map and legend
handle = legend1.Layers.Add(shpfileOpen, true);
legend1.Map.set_LayerName(handle, System.IO.Path.GetFileNameWithoutExtension(shpfileOpen.Filename));
//handle = axMap1.AddLayer(shpfileOpen, true);
handleMap.Add(handle);
string oldProj = shpfileOpen.Projection;
// bool status = MapWinGeoProc.SpatialReference.ProjectShapefile(sourceProj, destProj, inputSF, resultSF)
this.flagMapaAbierto = true;
}
}
}
}
