/// <summary>
/// Get Envelope in external coordinates.
/// </summary>
/// <param name="precisionModel"></param>
/// <param name="envelope"></param>
/// <returns></returns>
public static IEnvelope GetEnvelopeExternal(PrecisionModel precisionModel, IEnvelope envelope)
{
// get envelose in external coordinates
Coordinate min = new Coordinate(envelope.Minimum.X, envelope.Minimum.Y);
Coordinate max = new Coordinate(envelope.Maximum.X, envelope.Maximum.Y);
// min = precisionModel.ToExternal(min);
// max = precisionModel.ToExternal(max);
Envelope bounds = new Envelope(min.X, max.X, min.Y, max.Y);
return bounds;
}
/// <summary>
///
/// </summary>
/// <param name="g0"></param>
/// <param name="g1"></param>
public GeometryGraphOperation(IGeometry g0, IGeometry g1)
{
// use the most precise model for the result
if (g0.PrecisionModel.CompareTo(g1.PrecisionModel) >= 0)
ComputationPrecision = new PrecisionModel(g0.PrecisionModel);
else ComputationPrecision = new PrecisionModel(g1.PrecisionModel);
arg = new GeometryGraph[2];
arg[0] = new GeometryGraph(0, g0);
arg[1] = new GeometryGraph(1, g1);
}
/// <summary>
/// Imports a shapefile into a dababase Table.
/// </summary>
/// <remarks>
/// This method assumes a Table has already been created in the database.
/// Calling this method does not close the connection that is passed in.
/// </remarks>
/// <param name="filename"></param>
/// <param name="connectionstring"></param>
/// <param name="tableName"></param>
/// <returns></returns>
public static int ImportShapefile(string filename, string connectionstring, string tableName)
{
using (SqlConnection connection = new SqlConnection(connectionstring))
{
int rowsAdded = -1;
PrecisionModel pm = new PrecisionModel();
GeometryFactory geometryFactory = new GeometryFactory(pm, -1);
DataTable shpDataTable = Shapefile.CreateDataTable(filename, tableName, geometryFactory);
string createTableSql = CreateDbTable(shpDataTable, true);
SqlCommand createTableCommand = new SqlCommand(createTableSql, connection);
connection.Open();
createTableCommand.ExecuteNonQuery();
string sqlSelect = String.Format("select * from {0}", tableName);
SqlDataAdapter selectCommand = new SqlDataAdapter(sqlSelect, connection);
// use a data adaptor - saves donig the inserts ourselves
SqlDataAdapter dataAdapter = new SqlDataAdapter();
dataAdapter.SelectCommand = new SqlCommand(sqlSelect, connection);
SqlCommandBuilder custCB = new SqlCommandBuilder(dataAdapter);
DataSet ds = new DataSet();
// fill dataset
dataAdapter.Fill(ds, shpDataTable.TableName);
// copy rows from our datatable to the empty Table in the DataSet
int i = 0;
foreach (DataRow row in shpDataTable.Rows)
{
DataRow newRow = ds.Tables[0].NewRow();
newRow.ItemArray = row.ItemArray;
//gotcha! - new row still needs to be added to the Table.
//NewRow() just creates a new row with the same schema as the Table. It does
//not add it to the Table.
ds.Tables[0].Rows.Add(newRow);
i++;
}
// update all the rows in batch
rowsAdded = dataAdapter.Update(ds, shpDataTable.TableName);
int iRows = shpDataTable.Rows.Count;
Debug.Assert(rowsAdded != iRows, String.Format("{0} of {1} rows were added to the database.", rowsAdded, shpDataTable.Rows.Count));
return rowsAdded;
}
}
/// <summary>
///
/// </summary>
/// <param name="coord"></param>
/// <param name="exemplar"></param>
/// <returns></returns>
private static IPoint CreatePointFromInternalCoord(Coordinate coord, IGeometry exemplar)
{
Coordinate c = new Coordinate(coord);
PrecisionModel prc = new PrecisionModel(exemplar.PrecisionModel);
prc.MakePrecise(c);
return exemplar.Factory.CreatePoint(c);
}
/// <summary>
///
/// </summary>
/// <param name="pm"></param>
public SimpleGeometryPrecisionReducer(PrecisionModel pm)
{
_newPrecisionModel = pm;
}
/// <summary>
/// Initializes a new instance of the <see cref="SimpleSnapRounder"/> class.
/// </summary>
/// <param name="pm">The <see cref="PrecisionModel" /> to use.</param>
public SimpleSnapRounder(PrecisionModel pm)
{
_li = new RobustLineIntersector();
_li.PrecisionModel = pm;
_scaleFactor = pm.Scale;
}
/// <summary>
/// Constructs a GeometryFactory that generates Geometries having the given
/// <c>PrecisionModel</c> and spatial-reference ID, and the default CoordinateSequence
/// implementation.
/// </summary>
/// <param name="precisionModel">The PrecisionModel to use.</param>
/// <param name="srid">The SRID to use.</param>
public GeometryFactory(PrecisionModel precisionModel, int srid)
: this(precisionModel, srid, GetDefaultCoordinateSequenceFactory()) { }
/// <summary>
/// Constructs a GeometryFactory pertaining to a specific _coordinateSequenceFactory
/// using any valid IGeometryFactory and ICoordinateSequenceFactory interface
/// </summary>
/// <param name="gf">An IGeometryFactory Interface</param>
/// <param name="coordinateSequenceFactory">An ICoordianteSequenceFactory interface</param>
public GeometryFactory(IGeometryFactory gf, ICoordinateSequenceFactory coordinateSequenceFactory)
{
_precisionModel = new PrecisionModel(gf.PrecisionModel);
_coordinateSequenceFactory = coordinateSequenceFactory;
_srid = gf.SRID;
}
/// <summary>
///
/// </summary>
/// <param name="g"></param>
/// <param name="distance"></param>
/// <returns></returns>
public IGeometry Buffer(IGeometry g, double distance)
{
PrecisionModel precisionModel = workingPrecisionModel;
if (precisionModel == null)
precisionModel = new PrecisionModel(g.PrecisionModel);
// factory must be the same as the one used by the input
geomFact = g.Factory;
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, quadrantSegments);
curveBuilder.EndCapStyle = endCapStyle;
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
IList bufferSegStrList = curveSetBuilder.GetCurves();
// short-circuit test
if (bufferSegStrList.Count <= 0)
{
IGeometry emptyGeom = geomFact.CreateGeometryCollection(new Geometry[0]);
return emptyGeom;
}
ComputeNodedEdges(bufferSegStrList, precisionModel);
graph = new PlanarGraph(new OverlayNodeFactory());
graph.AddEdges(edgeList.Edges);
IList subgraphList = CreateSubgraphs(graph);
PolygonBuilder polyBuilder = new PolygonBuilder(geomFact);
BuildSubgraphs(subgraphList, polyBuilder);
IList resultPolyList = polyBuilder.Polygons;
IGeometry resultGeom = geomFact.BuildGeometry(resultPolyList);
return resultGeom;
}
/// <summary>
/// Constructs a GeometryFactory that generates Geometries having the given
/// PrecisionModel, spatial-reference ID, and CoordinateSequence implementation.
/// </summary>
/// <param name="precisionModel"></param>
/// <param name="srid"></param>
/// <param name="coordinateSequenceFactory"></param>
public GeometryFactory(PrecisionModel precisionModel, int srid,
ICoordinateSequenceFactory coordinateSequenceFactory)
{
_precisionModel = precisionModel;
_coordinateSequenceFactory = coordinateSequenceFactory;
_srid = srid;
}
/// <summary>
/// Initializes a new instance of the <see cref="IteratedNoder"/> class.
/// </summary>
/// <param name="pm"></param>
public IteratedNoder(PrecisionModel pm)
{
li = new RobustLineIntersector();
li.PrecisionModel = pm;
}
/// <summary>
///
/// </summary>
/// <param name="g0"></param>
public GeometryGraphOperation(IGeometry g0)
{
ComputationPrecision = new PrecisionModel(g0.PrecisionModel);
arg = new GeometryGraph[1];
arg[0] = new GeometryGraph(0, g0);;
}
/// <summary>
/// Creates the <c>NumberFormatInfo</c> used to write <c>double</c>s
/// with a sufficient number of decimal places.
/// </summary>
/// <param name="precisionModel">
/// The <c>PrecisionModel</c> used to determine
/// the number of decimal places to write.
/// </param>
/// <returns>
/// A <c>NumberFormatInfo</c> that write <c>double</c>
/// s without scientific notation.
/// </returns>
private static NumberFormatInfo CreateFormatter(PrecisionModel precisionModel)
{
// the default number of decimal places is 16, which is sufficient
// to accomodate the maximum precision of a double.
int decimalPlaces = precisionModel.MaximumSignificantDigits;
// specify decimal separator explicitly to avoid problems in other locales
NumberFormatInfo nfi = new NumberFormatInfo();
nfi.NumberDecimalSeparator = ".";
nfi.NumberDecimalDigits = decimalPlaces;
nfi.NumberGroupSeparator = String.Empty;
nfi.NumberGroupSizes = new int[] { };
return nfi;
}
/// <summary>
///
/// </summary>
/// <param name="bufferSegStrList"></param>
/// <param name="precisionModel"></param>
private void ComputeNodedEdges(IList bufferSegStrList, PrecisionModel precisionModel)
{
INoder noder = GetNoder(precisionModel);
noder.ComputeNodes(bufferSegStrList);
IList nodedSegStrings = noder.GetNodedSubstrings();
foreach(object obj in nodedSegStrings)
{
SegmentString segStr = (SegmentString)obj;
Label oldLabel = (Label)segStr.Data;
Edge edge = new Edge(segStr.Coordinates, new Label(oldLabel));
InsertEdge(edge);
}
}
/// <summary>
///
/// </summary>
/// <param name="precisionModel"></param>
/// <returns></returns>
private INoder GetNoder(PrecisionModel precisionModel)
{
if (workingNoder != null)
return workingNoder;
// otherwise use a fast (but non-robust) noder
LineIntersector li = new RobustLineIntersector();
li.PrecisionModel = precisionModel;
MCIndexNoder noder = new MCIndexNoder(new IntersectionAdder(li));
return noder;
}
/// <summary>
/// Constructs a GeometryFactory object from any valid IGeometryFactory interface
/// </summary>
/// <param name="gf"></param>
public GeometryFactory(IGeometryFactory gf)
{
_precisionModel = new PrecisionModel(gf.PrecisionModel);
_coordinateSequenceFactory = GetDefaultCoordinateSequenceFactory();
_srid = gf.SRID;
}
/// <summary>
///
/// </summary>
/// <param name="precisionDigits"></param>
private void BufferFixedPrecision(int precisionDigits)
{
double sizeBasedScaleFactor = PrecisionScaleFactor(argGeom, distance, precisionDigits);
PrecisionModel fixedPM = new PrecisionModel(sizeBasedScaleFactor);
// don't change the precision model of the Geometry, just reduce the precision
SimpleGeometryPrecisionReducer reducer = new SimpleGeometryPrecisionReducer(fixedPM);
IGeometry reducedGeom = reducer.Reduce(argGeom);
BufferBuilder bufBuilder = new BufferBuilder();
bufBuilder.WorkingPrecisionModel = fixedPM;
bufBuilder.QuadrantSegments = quadrantSegments;
// this may throw an exception, if robustness errors are encountered
resultGeometry = bufBuilder.Buffer(reducedGeom, distance);
}
/// <summary>
/// Copy constructor to create a new <c>PrecisionModel</c>
/// from an existing one.
/// </summary>
/// <param name="pm"></param>
public PrecisionModel(PrecisionModel pm)
{
modelType = pm.modelType;
scale = pm.scale;
}
