/// <summary>
/// Removes points from the point shapefile that lie within any shapes in the polygon shapefile.
/// </summary>
/// <param name="pointSF">The point shapefile.</param>
/// <param name="polygonSF">The shapefile containing the erase polygons.</param>
/// <param name="resultSF">The resulting file with points removed.</param>
/// <returns>False if an error was encountered, true otherwise.</returns>
public static bool ErasePointSFWithPolySF(ref MapWinGIS.Shapefile pointSF, ref MapWinGIS.Shapefile polygonSF, ref MapWinGIS.Shapefile resultSF)
{
MapWinUtility.Logger.Dbg("ErasePointSFWithPolySF(pointSF : " + Macro.ParamName(pointSF) + ",\n" +
" polygonSF: " + Macro.ParamName(polygonSF) + ",\n" +
" resultSF: " + resultSF.ToString());
if (pointSF == null || polygonSF == null || resultSF == null)
{
gErrorMsg = "One of the input parameters is null.";
Error.SetErrorMsg(gErrorMsg);
Debug.WriteLine(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
int shpIndex = 0;
int numPts = pointSF.NumShapes;
for (int i = 0; i <= numPts - 1; i++)
{
shpIndex = resultSF.NumShapes;
resultSF.EditInsertShape(pointSF.get_Shape(i), ref shpIndex);
}
int numPolygons = polygonSF.NumShapes;
for (int i = 0; i <= numPolygons - 1; i++)
{
MapWinGIS.Shape currPoly = new MapWinGIS.ShapeClass();
currPoly.Create(polygonSF.ShapefileType);
currPoly = polygonSF.get_Shape(i);
int numParts = currPoly.NumParts;
if (numParts == 0)
{
numParts = 1;
}
Globals.Vertex[][] polyVertArray = new Globals.Vertex[numParts][];
Globals.ConvertPolyToVertexArray(ref currPoly, out polyVertArray);
numPts = resultSF.NumShapes;
for (int j = 0; j <= numPts - 1; j++)
{
double x = resultSF.QuickPoint(j, 0).x;
double y = resultSF.QuickPoint(j, 0).y;
if (Utils.PointInPoly(ref polyVertArray, x, y) == true)
{
//remove the point.
resultSF.EditDeleteShape(j);
numPts--;
j--;
}
}
}
MapWinUtility.Logger.Dbg("Finsihed ErasePointSFWithPolySF");
return(true);
}
/// <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);
}
/// <summary>
/// Merges two lines (at matching end points) or two polygons
/// (by dissolving the common border or by combining into a multi-part polygon)
/// to make one result shape.
/// This version requires that both shapes be located in the same shapefile.
/// </summary>
/// <param name="shapes">The shapefile containing the two shapes to be merged.</param>
/// <param name="indexOne">The index of the first shape.</param>
/// <param name="indexTwo">The index of the second shape.</param>
/// <param name="resultShp">The result of merging the shapes at indexOne and indexTwo together.</param>
/// <returns>True if the shapes were merged, false otherwise.</returns>
public static bool MergeShapes(ref MapWinGIS.Shapefile shapes, int indexOne, int indexTwo, out MapWinGIS.Shape resultShp)
{
MapWinUtility.Logger.Dbg("MergeShapes(shapes: " + Macro.ParamName(shapes) + ",\n" +
" indexOne: " + indexOne.ToString() + ",\n" +
" indexTwo: " + indexTwo.ToString() + ",\n" +
" resultShp: resultShp)");
Error.ClearErrorLog();
MapWinGIS.ShpfileType sfType = shapes.ShapefileType;
MapWinGIS.Shape mShp = new MapWinGIS.ShapeClass();
mShp.Create(sfType);
bool status = false;
//having a point merge function is quite pointless...but, just in case it's needed!
if (sfType == MapWinGIS.ShpfileType.SHP_POINT || sfType == MapWinGIS.ShpfileType.SHP_POLYGONM || sfType == MapWinGIS.ShpfileType.SHP_POLYGONZ)
{
MapWinGIS.Point pt1 = new MapWinGIS.PointClass();
pt1 = shapes.QuickPoint(indexOne, 0);
MapWinGIS.Point pt2 = new MapWinGIS.PointClass();
pt2 = shapes.QuickPoint(indexTwo, 0);
status = MergePoints(ref pt1, ref pt2, sfType, out mShp);
while (Marshal.ReleaseComObject(pt1) != 0)
{
;
}
pt1 = null;
while (Marshal.ReleaseComObject(pt2) != 0)
{
;
}
pt2 = null;
resultShp = mShp;
MapWinUtility.Logger.Dbg("Finished MergeShapes");
return(status);
} //end of merging points
//merge polygons
else if (sfType == MapWinGIS.ShpfileType.SHP_POLYGON || sfType == MapWinGIS.ShpfileType.SHP_POLYGONM || sfType == MapWinGIS.ShpfileType.SHP_POLYGONZ)
{
MapWinGIS.Shape poly1 = new MapWinGIS.ShapeClass();
poly1 = shapes.get_Shape(indexOne);
MapWinGIS.Shape poly2 = new MapWinGIS.ShapeClass();
poly2 = shapes.get_Shape(indexTwo);
status = MergePolygons(ref poly1, ref poly2, sfType, out mShp);
while (Marshal.ReleaseComObject(poly1) != 0)
{
;
}
poly1 = null;
while (Marshal.ReleaseComObject(poly2) != 0)
{
;
}
poly2 = null;
resultShp = mShp;
MapWinUtility.Logger.Dbg("Finished MergeShapes");
return(status);
} //end of merging polygons
//Merge lines by joining them at common endpoints
else if (sfType == MapWinGIS.ShpfileType.SHP_POLYLINE || sfType == MapWinGIS.ShpfileType.SHP_POLYLINEM || sfType == MapWinGIS.ShpfileType.SHP_POLYLINEZ)
{
MapWinGIS.Shape line1 = new MapWinGIS.ShapeClass();
line1 = shapes.get_Shape(indexOne);
MapWinGIS.Shape line2 = new MapWinGIS.ShapeClass();
line2 = shapes.get_Shape(indexTwo);
status = MergeLines(ref line1, ref line2, sfType, out mShp);
if (line1 != null)
{
while (Marshal.ReleaseComObject(line1) != 0)
{
;
}
}
line1 = null;
if (line2 != null)
{
while (Marshal.ReleaseComObject(line2) != 0)
{
;
}
}
line2 = null;
resultShp = mShp;
MapWinUtility.Logger.Dbg("Finished MergeShapes");
return(status);
} //end of merging lines
else
{
gErrorMsg = "Unknown shapefile type, aborting call to ShapeMerge.";
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
resultShp = mShp;
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
}
/// <summary>
/// Returns an in-memory shapefile of points from the input shapefile that fall within the polygon.
/// </summary>
/// <param name="pointSF">Full path to the point shapefile.</param>
/// <param name="polygon">The polygon used for clipping the point shapefile.</param>
/// <param name="result">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 MapWinGIS.Shapefile pointSF, ref MapWinGIS.Shape polygon, out MapWinGIS.Shapefile result, bool copyAttributes)
{
MapWinUtility.Logger.Dbg("ClipPointSFWithPolygon(pointSF: " + Macro.ParamName(pointSF) + ",\n" +
" polygon: " + Macro.ParamName(polygon) + ",\n" +
" result: out, \n" +
" copyAttributes: " + copyAttributes.ToString() + ",\n");
MapWinGIS.Shapefile resultSF = new MapWinGIS.ShapefileClass();
int shpIndex = 0; //all new shapes will be placed at the beginning of the shapefile
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)
{
string tempPath = System.IO.Path.GetTempPath() + "resultSF.shp";
DataManagement.DeleteShapefile(ref tempPath);
string tmpName;
//create the result shapeFile if it does not already exist
//if(resultSF.CreateNew(tempPath, sfType) == false)
//{
// gErrorMsg = "Problem creating the result shapeFile: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
// Debug.WriteLine(gErrorMsg);
// MapWinGeoProc.Error.SetErrorMsg(gErrorMsg);
// result = resultSF;
// return false;
//}
//CDM 8/4/2006 resultSF.CreateNew(resultSFPath, sfType);
Globals.PrepareResultSF(ref tempPath, ref resultSF, sfType);
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;
resultSF.EditInsertField(tmpField, ref f, null);
}
}
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));
}
}
}
}
}
else
{
gErrorMsg = "The shapefile is of the wrong type. Should be of type Point.";
Debug.WriteLine(gErrorMsg);
MapWinGeoProc.Error.SetErrorMsg(gErrorMsg);
result = resultSF;
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
result = resultSF;
MapWinUtility.Logger.Dbg("Finished ClipPointSFWithPolygon");
return(true);
}
/// <summary>
/// Removes points from the point shapefile that lie within the polygon.
/// </summary>
/// <param name="pointSF">The point shapefile.</param>
/// <param name="polygon">The erase polygon.</param>
/// <param name="resultSF">The resulting file with points removed.</param>
/// <param name="CopyAttributes">Indicates whether to copy attributes</param>
/// <returns>False if an error was encountered, true otherwise.</returns>
public static bool ErasePointSFWithPoly(ref MapWinGIS.Shapefile pointSF, ref MapWinGIS.Shape polygon, ref MapWinGIS.Shapefile resultSF, bool CopyAttributes)
{
MapWinUtility.Logger.Dbg("ErasePointSFWithPoly(pointSF: " + Macro.ParamName(pointSF) + "\n, " +
" polygon: " + Macro.ParamName(polygon) + "\n, " +
" resultSF: " + Macro.ParamName(resultSF) + "\n, " +
" CopyAttributes: " + CopyAttributes.ToString() + ")");
if (pointSF == null || polygon == null || resultSF == null)
{
gErrorMsg = "One of the input parameters is null.";
Error.SetErrorMsg(gErrorMsg);
Debug.WriteLine(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
if (CopyAttributes)
{
string tmpName;
MapWinGIS.Field tmpField, currField;
for (int f = 0; f <= pointSF.NumFields - 1; f++)
{
tmpField = new MapWinGIS.Field();
currField = pointSF.get_Field(f);
tmpName = currField.Name;
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);
}
}
int numPts = pointSF.NumShapes;
int numParts = polygon.NumParts;
if (numParts == 0)
{
numParts = 1;
}
int shpIndex = 0;
Globals.Vertex[][] vertArray = new Globals.Vertex[numParts][];
Globals.ConvertPolyToVertexArray(ref polygon, out vertArray);
for (int i = 0; i <= numPts - 1; i++)
{
MapWinGIS.Point currPt = new MapWinGIS.PointClass();
currPt = pointSF.QuickPoint(i, 0);
double currX = currPt.x;
double currY = currPt.y;
if (Utils.PointInPoly(ref vertArray, currX, currY) == false)
{
shpIndex = resultSF.NumShapes;
if (resultSF.EditInsertShape(pointSF.get_Shape(i), ref shpIndex) == false)
{
gErrorMsg = "ErasePointSF: problem inserting shape into result file: " + resultSF.get_ErrorMsg(resultSF.LastErrorCode);
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
if (CopyAttributes)
{
for (int f = 0; f <= pointSF.NumFields - 1; f++)
{
bool tmpbool = resultSF.EditCellValue(f, shpIndex, pointSF.get_CellValue(f, i));
}
}
}
}
MapWinUtility.Logger.Dbg("Finished ErasePointSFWithPoly");
return(true);
}