/// <summary>
/// Prompts the user for information needed to create a new shapefile, then creates it.
/// </summary>
public void AddNewShapefile()
{
AddShapefileForm dlg = new AddShapefileForm();
if (dlg.ShowDialog(m_globals.MapWindowForm) == System.Windows.Forms.DialogResult.OK)
{
MapWinGIS.Shapefile sf = new MapWinGIS.ShapefileClass();
switch (dlg.cmbType.Text)
{
case "Point":
sf.CreateNewWithShapeID(dlg.txtFilename.Text, MapWinGIS.ShpfileType.SHP_POINT);
break;
case "Line":
sf.CreateNewWithShapeID(dlg.txtFilename.Text, MapWinGIS.ShpfileType.SHP_POLYLINE);
break;
case "Polygon":
sf.CreateNewWithShapeID(dlg.txtFilename.Text, MapWinGIS.ShpfileType.SHP_POLYGON);
break;
default:
return;
}
sf.SaveAs(dlg.txtFilename.Text, null);
sf.Close();
m_globals.MapWin.Layers.Add(dlg.txtFilename.Text);
MapWinUtility.Logger.Message("An empty shapefile has been created. Before adding shapes, make sure that your extents are set properly. To make sure extents are correct load an image, grid or shapefile that is located in the same area.", "Important Information!", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Information, System.Windows.Forms.DialogResult.OK);
}
}
/// <summary>
/// Returns a shapefile of points from the input shapefile that fall within the polygon.
/// </summary>
/// <param name="pointSFPath">Full path to the point shapefile.</param>
/// <param name="polygon">The polygon used for clipping the point shapefile.</param>
/// <param name="resultSFPath">Full path to where the resulting point shapefile should be saved.</param>
/// <param name="copyAttributes">True if copying attributes over</param>
/// <returns>False if an error was encountered, true otherwise.</returns>
public static bool ClipPointSFWithPolygon(ref string pointSFPath, ref MapWinGIS.Shape polygon, ref string resultSFPath, bool copyAttributes)
{
MapWinUtility.Logger.Dbg("ClipPointSFWithPolygon(pointSFPath: " + pointSFPath + ",\n" +
" polygon: " + Macro.ParamName(polygon) + ",\n" +
" resultSFPath: " + resultSFPath.ToString() + ",\n" +
" copyAttributes: " + copyAttributes.ToString() + ")");
MapWinGIS.Shapefile resultSF = new MapWinGIS.ShapefileClass();
MapWinGIS.Shapefile pointSF = new MapWinGIS.ShapefileClass();
int shpIndex = 0; //all new shapes will be placed at the beginning of the shapefile
string tmpName;
if (pointSF.Open(pointSFPath, null) == false)
{
gErrorMsg = "Failure to open input shapefile: " + pointSF.get_ErrorMsg(pointSF.LastErrorCode);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
MapWinGIS.ShpfileType sfType = pointSF.ShapefileType;
//make sure we are dealing with a valid shapefile type
if (sfType == MapWinGIS.ShpfileType.SHP_POINT || sfType == MapWinGIS.ShpfileType.SHP_POINTM || sfType == MapWinGIS.ShpfileType.SHP_POINTZ)
{
if (Globals.PrepareResultSF(ref resultSFPath, ref resultSF, sfType, copyAttributes) == false)
{
return(false);
}
if (copyAttributes)
{
MapWinGIS.Field tmpField, pointField;
for (int f = 0; f <= pointSF.NumFields - 1; f++)
{
tmpField = new MapWinGIS.Field();
pointField = pointSF.get_Field(f);
tmpName = pointField.Name;
if (tmpName.Contains("MWShapeID"))
{
tmpField.Name = "Last_" + tmpName;
}
else
{
tmpField.Name = tmpName;
}
tmpField.Width = pointField.Width;
tmpField.Type = pointField.Type;
tmpField.Precision = pointField.Precision;
tmpField.Key = pointField.Key;
if (!resultSF.EditInsertField(tmpField, ref f, null))
{
return(false);
}
}
}
int numTargetPoints = pointSF.NumShapes;
MapWinGIS.Point targetPoint = new MapWinGIS.PointClass();
//MapWinGIS.Utils utils = new MapWinGIS.UtilsClass();
int numParts = polygon.NumParts;
if (numParts == 0)
{
numParts = 1;
}
Globals.Vertex[][] polyVertArray = new Globals.Vertex[numParts][];
Globals.ConvertPolyToVertexArray(ref polygon, out polyVertArray);
for (int i = 0; i <= numTargetPoints - 1; i++)
{
targetPoint = pointSF.QuickPoint(i, 0);
if (Utils.PointInPoly(ref polyVertArray, ref targetPoint) == true)
{
resultSF.EditInsertShape(pointSF.get_Shape(i), ref shpIndex);
if (copyAttributes)
{
for (int f = 0; f <= pointSF.NumFields - 1; f++)
{
bool tmpbool = resultSF.EditCellValue(f, shpIndex, pointSF.get_CellValue(f, i));
}
}
}
}
MapWinGIS.Field ID = new MapWinGIS.FieldClass();
ID.Name = "MWShapeID";
ID.Type = MapWinGIS.FieldType.INTEGER_FIELD;
int fieldIndex = 0;
if (resultSF.EditInsertField(ID, ref fieldIndex, null) == false)
{
gErrorMsg = "Problem inserting field into .dbf table: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
int numIDs = resultSF.NumShapes;
for (int i = 0; i <= numIDs - 1; i++)
{
if (resultSF.EditCellValue(fieldIndex, i, i) == false)
{
gErrorMsg = "Problem inserting value into .dbf table for shape " + i + ": " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
}
if (resultSF.StopEditingShapes(true, true, null) == false)
{
gErrorMsg = "Problem with StopEditingShapes: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
resultSF.Close();
pointSF.Close();
MapWinUtility.Logger.Dbg("Finished ClipPointSFWithPolygon");
}
else
{
pointSF.Close();
gErrorMsg = "Shapefile type is incorrect. Must be of type Point.";
Debug.WriteLine(gErrorMsg);
MapWinGeoProc.Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
return(true);
}
/// <summary>
/// Returns all portions of the shapefile polygons that fall within the clipper polygon.
/// </summary>
/// <param name="polySFPath">The full path to the shapefile of polygons to be clipped.</param>
/// <param name="polygon">The polygon used for clipping the shapefile.</param>
/// <param name="resultSFPath">The full path to the result file for where the clipped polygons should be saved.</param>
/// <param name="copyAttributes">True if copying attrs</param>
/// <returns>False if an error was encountered, true otherwise.</returns>
public static bool ClipPolygonSFWithPolygon(ref string polySFPath, ref MapWinGIS.Shape polygon, ref string resultSFPath, bool copyAttributes)
{
MapWinUtility.Logger.Dbg("ClipPolygonSFWithPolygon(polySFPath: " + polySFPath + ",\n " +
" polygon: + " + Macro.ParamName(polygon) + ",\n" +
" resultsSFPath: " + resultSFPath + ",\n" +
" copyAttributes: " + copyAttributes + ",\n");
MapWinGIS.Shapefile resultSF = new MapWinGIS.ShapefileClass();
MapWinGIS.Shapefile polySF = new MapWinGIS.ShapefileClass();
polySF.Open(polySFPath, null);
MapWinGIS.ShpfileType sfType = polySF.ShapefileType;
int shapeIndex = 0;//insert new shapes at the beginning of the shapefile
string tmpName;
if (Globals.PrepareResultSF(ref resultSFPath, ref resultSF, sfType, copyAttributes) == false)
{
polySF.Close();
return(false);
}
if (copyAttributes)
{
MapWinGIS.Field tmpField, currField;
for (int f = 0; f <= polySF.NumFields - 1; f++)
{
tmpField = new MapWinGIS.Field();
currField = polySF.get_Field(f);
tmpName = currField.Name;
if (tmpName.Contains("MWShapeID"))
{
tmpField.Name = "Last_" + tmpName;
}
else
{
tmpField.Name = tmpName;
}
tmpField.Width = currField.Width;
tmpField.Type = currField.Type;
tmpField.Precision = currField.Precision;
tmpField.Key = currField.Key;
resultSF.EditInsertField(tmpField, ref f, null);
}
}
if (sfType == MapWinGIS.ShpfileType.SHP_POLYGON || sfType == MapWinGIS.ShpfileType.SHP_POLYGONM || sfType == MapWinGIS.ShpfileType.SHP_POLYGONZ)
{
MapWinGIS.Shape resultShape = new MapWinGIS.ShapeClass();
MapWinGIS.Extents shpExtents = new MapWinGIS.ExtentsClass();
int numShapes = polySF.NumShapes;
bool boundsIntersect = false;
for (int i = 0; i <= numShapes - 1; i++)
{
MapWinGIS.Shape currPoly = new MapWinGIS.ShapeClass();
currPoly = polySF.get_Shape(i);
//check to see if bounds intersect before sending shape to GPC clip function
boundsIntersect = Globals.CheckBounds(ref currPoly, ref polygon);
if (boundsIntersect == true)
{
//find the shape resulting from intersection
resultShape = SpatialOperations.Intersection(currPoly, polygon);
if (resultShape.numPoints != 0)
{
//save the new shape to the result shapefile
if (resultSF.EditInsertShape(resultShape, ref shapeIndex) == false)
{
gErrorMsg = "Problem inserting shape: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
if (copyAttributes)
{
for (int f = 0; f <= polySF.NumFields - 1; f++)
{
bool tmpbool = resultSF.EditCellValue(f, shapeIndex, polySF.get_CellValue(f, i));
}
}
}
}
}
}
if (copyAttributes)
{
MapWinGIS.Field ID = new MapWinGIS.FieldClass();
ID.Name = "MWShapeID";
ID.Type = MapWinGIS.FieldType.INTEGER_FIELD;
int fieldIndex = 0;
if (resultSF.EditInsertField(ID, ref fieldIndex, null) == false)
{
gErrorMsg = "Problem inserting field into .dbf table: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
}
int numIDs = resultSF.NumShapes;
for (int i = 0; i <= numIDs - 1; i++)
{
if (resultSF.EditCellValue(0, i, i) == false)
{
gErrorMsg = "Problem inserting value into .dbf table for shape " + i + ": " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
}
if (resultSF.StopEditingShapes(true, true, null) == false)
{
gErrorMsg = "Problem with StopEditingShapes: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
resultSF.Close();
polySF.Close();
MapWinUtility.Logger.Dbg("Finished ClipPolygonSFWithPolygon");
return(true);
}