private void TryToProjectCoord(ref Envelope fullEnvelope)
{
if (fullEnvelope.MinX >= -180 && fullEnvelope.MaxX <= 180 && fullEnvelope.MinY >= -90 && fullEnvelope.MaxY <= 90 && fullEnvelope.Width <= 360 && fullEnvelope.Height <= 180)
{
fullEnvelope = null;
IProjectionTransform prj = ProjectionTransformFactory.GetDefault();
_geometries = new List <Shape>(_features.Count);
foreach (Feature fet in _features)
{
//保留未投影前的几何形状对象
_geometries.Add(fet.Geometry.Clone() as Shape);
//重投影
fet.Geometry.Project(prj);
//计算外接矩形
if (fullEnvelope == null)
{
fullEnvelope = fet.Geometry.Envelope.Clone() as Envelope;
}
else
{
fullEnvelope.UnionWith(fet.Geometry.Envelope);
}
}
}
}
private void UpdateEnvelope()
{
if (_grids == null || _grids.Count == 0)
{
return;
}
int n = _grids.Count;
_envelope = null;
for (int i = 0; i < n; i++)
{
if (_grids[i].Envelope == null)
{
continue;
}
if (_envelope == null)
{
_envelope = _grids[i].Envelope;
}
_envelope.UnionWith(_grids[i].Envelope);
}
}
private IGrid ReadGridFromFile(int gridNo)
{
Envelope evp = _gridStateIndicator.GetEnvelope(gridNo);
Feature[] fets = _reader.GetFeatures(evp);
if (fets != null && fets.Length > 0)
{
fets = TrySplit(fets);
if (fets == null)
{
return(null);
}
evp = fets[0].Geometry.Envelope.Clone() as Envelope;
foreach (Feature fet in fets)
{
fet.SetFeatureClass(_featureClass);
evp.UnionWith(fet.Geometry.Envelope);
}
return(new Grid(gridNo, evp, fets));
}
return(new Grid(gridNo, evp, null));
}
public Envelope GetFullEnvelope()
{
if (_layerContainer == null || _layerContainer.IsEmpty())
{
return(null);
}
Envelope evp = null;
for (int i = 0; i < _layerContainer.Layers.Length; i++)
{
IClass fetclass = _layerContainer.Layers[i].Class as IClass;
if (fetclass.IsEmpty())
{
continue;
}
if (evp == null)
{
evp = fetclass.FullEnvelope.Clone() as Envelope;
}
evp.UnionWith(fetclass.FullEnvelope);
}
return(evp);
}
private void CheckAndAddLevelField(out Envelope envelope)
{
envelope = _features[0].Geometry.Envelope.Clone() as Envelope;
string fld = cstLevelField.ToUpper();
foreach (Feature fet in _features)
{
fet.TempFlag = false;
envelope.UnionWith(fet.Geometry.Envelope);
if (fet.FieldNames == null || fet.FieldNames.Length == 0)
{
fet.SetFieldAndValues(new string[] { fld }, new string[] { "-1" });
continue;
}
bool exist = false;
for (int i = 0; i < fet.FieldNames.Length; i++)
{
if (fet.FieldNames[i].ToUpper() == fld)
{
fet.SetFieldValue(i, "-1");
exist = true;
break;
}
}
if (!exist)
{
string[] flds = new string[fet.FieldNames.Length + 1];
string[] vals = new string[fet.FieldValues.Length + 1];
Array.Copy(fet.FieldNames, flds, fet.FieldNames.Length);
Array.Copy(fet.FieldValues, vals, fet.FieldValues.Length);
flds[flds.Length - 1] = fld;
vals[vals.Length - 1] = "-1";
fet.SetFieldAndValues(flds, vals);
}
}
}
internal void UpdateEnvelope()
{
if (_features == null || _features.Count == 0)
{
_envelope = null;
return;
}
_envelope = null;
foreach (Feature fet in _features)
{
if (fet == null || fet.Geometry == null)
{
continue;
}
if (_envelope == null)
{
_envelope = fet.Geometry.Envelope.Clone() as Envelope;
}
else
{
_envelope.UnionWith(fet.Geometry.Envelope);
}
}
}
private void WriteFileHeader(Feature[] features)
{
if (_isFirstWrite)
{
byte[] byteArray;
Envelope env = features[0].Geometry.Envelope;
for (int i = 1; i < features.Length; i++)
{
env.UnionWith(features[i].Geometry.Envelope);
}
_currentEnvelope = env;
byteArray = BitConverter.GetBytes(9994);
int byteArrayValue = ToLocalEndian.ToInt32FromBig(byteArray);
_bwMainFile.Write(byteArrayValue);
_bwShxFile.Write(byteArrayValue);
byteArray = new byte[20];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
//
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
//
_bwMainFile.Write(1000);
_bwShxFile.Write(1000);
_bwMainFile.Write((int)_shapeType);
_bwShxFile.Write((int)_shapeType);
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = new byte[32];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
_isFirstWrite = false;
}
else
{
byte[] byteArray;
Envelope env = features[0].Geometry.Envelope;
for (int i = 1; i < features.Length; i++)
{
env.UnionWith(features[i].Geometry.Envelope);
}
if (_currentEnvelope != null)
{
env.UnionWith(_currentEnvelope);
}
_currentEnvelope = env;
_fsMainFile.Seek(24, SeekOrigin.Begin);
_fsShxFile.Seek(24, SeekOrigin.Begin);
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
_fsMainFile.Seek(8, SeekOrigin.Current);
_fsShxFile.Seek(8, SeekOrigin.Current);
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
private void WriteVectorDataToFiles(Feature[] features)
{
byte[] byteArray;
Envelope env = new Envelope(double.MaxValue, double.MaxValue, double.MinValue, double.MinValue);
foreach (Feature vf in features)
{
env.UnionWith(vf.Geometry.Envelope);
}
////write main file
//write main file and shx file header
byteArray = BitConverter.GetBytes(9994);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = new byte[20];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
////
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
byteArray = BitConverter.GetBytes(1000);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = new byte[32];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
//write main file and Shx file records
switch (_shapeType)
{
case enumShapeType.Point:
WriteShapePointRecords(features);
break;
case enumShapeType.MultiPoint:
WriteShapeMultiPointRecords(features);
break;
case enumShapeType.Polyline:
WriteShapePolylineRecords(features);
break;
case enumShapeType.Polygon:
WriteShapePolygonRecords(features);
break;
default:
break;
}
////write prj file,leave it now,no spec
CloseVectorDataFiles();
}
