//分块清理，提高效率
public static OSGeo.OGR.Layer cleanLayer_Cut(OSGeo.OGR.Layer pdLayer, double minArea, double maxArea, double maxCha = 1)
{
List <CutBox> Tree = buildTree(pdLayer);
shpDataSet.deleteLayerByName("pdClear");
OSGeo.OGR.Layer outLayer = shpDataSet.CreateLayer("pdClear", pdLayer.GetSpatialRef(), pdLayer.GetGeomType(), null);
OSGeo.OGR.Envelope oriEnve = new OSGeo.OGR.Envelope();
OSGeo.OGR.Envelope nextEnve = new OSGeo.OGR.Envelope();
StaticTools.msgLine("clean SlopeLine...");
for (int c = 0; c < Tree.Count; c++)
{
CutBox cb = Tree[c];
int featCount = cb.pdxIDs.Count;
for (int i = 0; i < featCount - 1; i++)
{
bool isOnly = true;
OSGeo.OGR.Feature ori = pdLayer.GetFeature(cb.pdxIDs[i]);
double oriArea = ori.GetGeometryRef().GetArea();
if (oriArea < minArea || oriArea > maxArea)
{
//判断当前要素的面积，过小或过大时，认为其有相同的图形，不加入新的Layer
isOnly = false;
}
else
{
//判断当前要素与其它要素的包围盒的对应边，差值都小于阈值时，认为是相同的图形，需要跳过
//没有相同的图型时，isOnly为true ，塞到新的layer里
ori.GetGeometryRef().GetEnvelope(oriEnve);
for (int j = i + 1; j < featCount; j++)
{
pdLayer.GetFeature(cb.pdxIDs[j]).GetGeometryRef().GetEnvelope(nextEnve);
if (Math.Abs(oriEnve.MaxX - nextEnve.MaxX) < maxCha &&
Math.Abs(oriEnve.MaxY - nextEnve.MaxY) < maxCha &&
Math.Abs(oriEnve.MinX - nextEnve.MinX) < maxCha &&
Math.Abs(oriEnve.MinY - nextEnve.MinY) < maxCha)
{
isOnly = false;
break;
}
}
}
if (isOnly)
{
outLayer.CreateFeature(ori);
}
StaticTools.progress((i + 2) * 100 / featCount, $"{i + 1} / {featCount}");
}
}
if (IsDelete)
{
shpDataSet.deleteLayerByName(pdLayer.GetName());
}
return(outLayer);
}
private static void _标准差(string dzx, out double aue, out double bzc)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource dzxDS = dr.Open(dzx, 0);
OSGeo.OGR.Layer dzxLayer = dzxDS.GetLayerByIndex(0);
//获取Featuer数
int featCount = dzxLayer.GetFeatureCount(0);
// 1 拿到每个Featuer的Value
double[] values = new double[featCount];
for (int i = 0; i < featCount; i++)
{
OSGeo.OGR.Feature fileFeat = dzxLayer.GetFeature(i);
OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
values[i] = fileFeat.GetFieldAsDouble("EVE");
fileGeom.Dispose();
fileFeat.Dispose();
}
dzxDS.Dispose();
// 2 求Values的平均值
aue = values.Average();
// 3 求values与平均值差的平方和
double pingFangHe = 0;
for (int i = 0; i < featCount; i++)
{
pingFangHe += (values[i] - aue) * (values[i] - aue);
}
// 4 每个值与平均值的差相加,除Featuer数.再开方,得到标准差
bzc = Math.Sqrt(pingFangHe / featCount);
}
static void getMinOutLineFromLayerToLayer(OSGeo.OGR.Layer inLayer)
{
shpDataSet.deleteLayerByName("minOutLine");
OSGeo.OGR.Layer minoutline = shpDataSet.CreateLayer("minOutLine", inLayer.GetSpatialRef(), inLayer.GetGeomType(), null);
OSGeo.OGR.Feature aFeat = null;
StaticTools.msgLine("getMinOutline...");
int featCount = inLayer.GetFeatureCount(0);
for (int i = 0; i < featCount; i++)
{
aFeat = inLayer.GetFeature(i);
OSGeo.OGR.Geometry oGeometry = aFeat.GetGeometryRef();
OSGeo.OGR.Geometry ogeo = oGeometry.GetGeometryRef(0);
QTGeometry qtGeo = new QTGeometry(ogeo);
minoutline.CreateFeature(qtGeo.GetSMBR());
StaticTools.progress((i + 1) * 100 / featCount, $"{i} / {featCount}");
}
minoutline.Dispose();
//inLayer.ResetReading();
//while ((aFeat = inLayer.GetNextFeature()) != null)
//{
// OSGeo.OGR.Geometry oGeometry = aFeat.GetGeometryRef();
// OSGeo.OGR.Geometry ogeo = oGeometry.GetGeometryRef(0);
// QTGeometry qtGeo = new QTGeometry(ogeo);
// minoutline.CreateFeature(qtGeo.GetSMBR());
//}
}
/// <summary>
/// 通过ID数组提取出所有要素
/// </summary>
/// <param name="dzLine"></param>
/// <param name="pdLing"></param>
/// <param name="savePath"></param>
public static void selectFeat(string dzLine, string pdLing, string savePath)
{
//获得数组
int[] a = getMinIdGroup(dzLine, pdLing);
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
//读取原Layer
OSGeo.OGR.DataSource dzDS = dr.Open(dzLine, 0);
OSGeo.OGR.Layer dzLayer = dzDS.GetLayerByIndex(0);
//新建Layer
if (System.IO.File.Exists(savePath))
{
System.IO.File.Delete(savePath);
}
OSGeo.OGR.DataSource ds = dr.CreateDataSource(savePath, null);
OSGeo.OGR.Layer fileLayer = ds.CreateLayer("", null, OSGeo.OGR.wkbGeometryType.wkbPolygon, null);
//get featuer by ID
for (int i = 0; i < a.Length; i++)
{
OSGeo.OGR.Feature dzFeat = dzLayer.GetFeature(a[i]);
OSGeo.OGR.Geometry dzGeom = dzFeat.GetGeometryRef();
OSGeo.OGR.Geometry fileGeom = dzGeom;
OSGeo.OGR.Feature fileFeat = new OSGeo.OGR.Feature(dzFeat.GetDefnRef());
fileFeat.SetGeometry(fileGeom);
fileLayer.CreateFeature(dzFeat);
}
fileLayer.Dispose();
ds.Dispose();
dzDS.Dispose();
}
public void QueryShape(IGeometry pGeometry)
{
if (pGeometry == null)
{
return;
}
try
{
OSGeo.OGR.Geometry ogrGeometry = m_currentOGRFeature.GetGeometryRef();
//export geometry from OGR to WKB
int wkbSize = ogrGeometry.WkbSize();
byte[] wkbBuffer = new byte[wkbSize];
ogrGeometry.ExportToWkb(wkbBuffer);
//import geometry from WKB to ESRI Shape
IWkb pWKB = pGeometry as IWkb;
pWKB.ImportFromWkb(wkbSize, ref wkbBuffer[0]);
pGeometry.SpatialReference = m_pDataset.SpatialReference;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(" Error: " + ex.Message);
pGeometry.SetEmpty();
}
}
/*************************************************************************************************/
/***************************读入SHP文件***************************/
/// <summary>
/// shpPolygon To List<Point[]>
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
public static List <Point[]> shpPolygonToPointGL(string filePath)
{
List <Point[]> allFeature = new List <Point[]>();
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource ds = dr.Open(filePath, 0);
OSGeo.OGR.Layer fileLayer = ds.GetLayerByIndex(0);
int FeatCount = fileLayer.GetFeatureCount(0);
for (int u = 0; u < FeatCount; u++)
{
OSGeo.OGR.Feature fileFeature = fileLayer.GetFeature(u);
OSGeo.OGR.Geometry fileGeom = fileFeature.GetGeometryRef();
OSGeo.OGR.Geometry subGeom = fileGeom.GetGeometryRef(0);
int k = subGeom.GetPointCount();
Point[] aFeat = new Point[k];
for (int i = 0; i < k; i++)
{
aFeat[i].X = subGeom.GetX(i);
aFeat[i].Y = subGeom.GetY(i);
aFeat[i].Z = subGeom.GetZ(i);
}
allFeature.Add(aFeat);
}
return(allFeature);
}
/******************************** 等值线转换为多边形 ***********************************************/
/// <summary>
/// 等值线转为POLYGON
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
public static string dzPoly(string filePath)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
string a = StaticTools.tempFilePath("shp", "等值线POLY");
OSGeo.OGR.DataSource newDS = dr.CreateDataSource(a, null);
OSGeo.OGR.Layer polyLayer = newDS.CreateLayer("", null, OSGeo.OGR.wkbGeometryType.wkbPolygon, null);
OSGeo.OGR.FieldDefn fieldDf0 = new OSGeo.OGR.FieldDefn("LID", OSGeo.OGR.FieldType.OFTInteger);
OSGeo.OGR.FieldDefn fieldDf1 = new OSGeo.OGR.FieldDefn("EVE", OSGeo.OGR.FieldType.OFTReal);
polyLayer.CreateField(fieldDf0, 1); //ID
polyLayer.CreateField(fieldDf1, 1); //Value
OSGeo.OGR.FeatureDefn featDF = new OSGeo.OGR.FeatureDefn("");
Console.WriteLine("开始等值线转POLY！");
OSGeo.OGR.DataSource cleanDS = dr.Open(filePath, 0);
OSGeo.OGR.Layer cleanLayer = cleanDS.GetLayerByIndex(0);
for (int i = 0; i < cleanLayer.GetFeatureCount(0); i++)
{
OSGeo.OGR.Feature lineFeat = cleanLayer.GetFeature(i);
OSGeo.OGR.Geometry lineGeom = lineFeat.GetGeometryRef();
OSGeo.OGR.Feature polyFeat = new OSGeo.OGR.Feature(featDF);
OSGeo.OGR.Geometry polyGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbPolygon);
OSGeo.OGR.Geometry subGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbLinearRing);
int u = lineGeom.GetPointCount();
for (int s = 0; s < u; s++)
{
double x = lineGeom.GetX(s);
double y = lineGeom.GetY(s);
double z = lineGeom.GetZ(s);
subGeom.AddPoint(x, y, z);
}
polyGeom.AddGeometry(subGeom);
polyFeat.SetGeometry(polyGeom);
polyLayer.CreateFeature(polyFeat);
lineGeom.Dispose();
polyGeom.Dispose();
subGeom.Dispose();
lineFeat.Dispose();
polyFeat.Dispose();
}
cleanLayer.Dispose();
polyLayer.Dispose();
cleanDS.Dispose();
newDS.Dispose();
Console.WriteLine("等值线转POLY完成！");
return(a);
}
/// <summary>
/// 清理Layer中重复的，面积过小的featuer,返回一个新的Layer
/// </summary>
/// <param name="inLayer">源layer</param>
/// <param name="andArea">是否判断最小面积</param>
/// <param name="minArea">最小面积</param>
/// <returns></returns>
public static OSGeo.OGR.Layer cleanLayer_FF(OSGeo.OGR.Layer inLayer)
{
string oldLayerName = inLayer.GetName();
string newLayerName = oldLayerName + "Clear";
shpDataSet.deleteLayerByName(newLayerName);
OSGeo.OGR.Layer outLayer = shpDataSet.CreateLayer(newLayerName, srs, inLayer.GetGeomType(), null);
int featCount = inLayer.GetFeatureCount(0);
StaticTools.msgLine($"clean resLine... before {featCount}");
for (int i = 0; i < featCount - 1; i++)
{
bool isOnly = true;
OSGeo.OGR.Feature ori = inLayer.GetFeature(i);
OSGeo.OGR.Envelope oriEnve = new OSGeo.OGR.Envelope();
ori.GetGeometryRef().GetEnvelope(oriEnve);
double maxCha = 1;
for (int j = i + 1; j < featCount; j++)
{
OSGeo.OGR.Feature next = inLayer.GetFeature(j);
OSGeo.OGR.Envelope nextEnve = new OSGeo.OGR.Envelope();
next.GetGeometryRef().GetEnvelope(nextEnve);
if (Math.Abs(oriEnve.MaxX - nextEnve.MaxX) < maxCha &&
Math.Abs(oriEnve.MaxY - nextEnve.MaxY) < maxCha &&
Math.Abs(oriEnve.MinX - nextEnve.MinX) < maxCha &&
Math.Abs(oriEnve.MinY - nextEnve.MinY) < maxCha)
{
isOnly = false;
break;
}
}
if (isOnly)
{
outLayer.CreateFeature(ori);
}
ori.Dispose();
StaticTools.progress((i + 2) * 100 / featCount, $"{i + 1} / {featCount}");
}
if (IsDelete)
{
shpDataSet.deleteLayerByName(inLayer.GetName());
}
StaticTools.msgLine($"clean resLine... after {outLayer.GetFeatureCount(0)}");
return(outLayer);
}
/// <summary>
/// 清理等值线上的点
/// </summary>
/// <param name="filePath"></param>
public static void claenPoint(string filePath)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
//进来的Layer
OSGeo.OGR.DataSource oriDs = dr.Open(filePath, 0);
OSGeo.OGR.Layer oriLayer = oriDs.GetLayerByIndex(0);
//出去的Layer
if (System.IO.File.Exists(filePath.Substring(0, filePath.LastIndexOf(".")) + "_targ.shp"))
{
// UsefullTools.deleteFiles(filePath.Substring(0, filePath.LastIndexOf(".")) + "_targ.shp");
}
OSGeo.OGR.DataSource targDs = dr.CreateDataSource(filePath.Substring(0, filePath.LastIndexOf(".")) + "_targ.shp", null);
OSGeo.OGR.Layer targLayer = targDs.CreateLayer("targ", null, OSGeo.OGR.wkbGeometryType.wkbPolygon, null);
int featCount = oriLayer.GetFeatureCount(0);
for (int i = 0; i < featCount; i++)
{
///进来的Featuer
OSGeo.OGR.Feature oriFeat = oriLayer.GetFeature(i);
///把一个Featuer转为点数组
OSGeo.OGR.Geometry oriGeom = oriFeat.GetGeometryRef();
OSGeo.OGR.Geometry subGeom = oriGeom.GetGeometryRef(0);
int pointCount = subGeom.GetPointCount();
Point[] aFeat = new Point[pointCount];
for (int c = 0; c < pointCount; c++)
{
aFeat[c].X = subGeom.GetX(c);
aFeat[c].Y = subGeom.GetY(c);
aFeat[c].Z = subGeom.GetZ(c);
}
///调选点方法,得到一个新的Featuer
OSGeo.OGR.Feature newFeat = JID(aFeat);
if (newFeat != null)
{
targLayer.CreateFeature(newFeat);
}
}
oriDs.Dispose();
targDs.Dispose();
}
/************************************** 清理等值线 *****************************************/
/// <summary>
/// 通过线长,值 清理等值线
/// </summary>
/// <param name="filePath"></param>
public static string cleanDS(string dzx)
{
Console.WriteLine("开始清理等值线！");
double aue, bzc; _标准差(dzx, out aue, out bzc);
double minLength = 50;
double maxLength = 2600;
double minValue = aue - bzc * 2;
double maxValue = aue + bzc * 2;
//open dzx
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource dzxDS = dr.Open(dzx, 0);
OSGeo.OGR.Layer dzxLayer = dzxDS.GetLayerByIndex(0);
//new a shp
string cleanline = StaticTools.tempFilePath("shp", "清理后的等值线");
OSGeo.OGR.DataSource newdzxDS = dr.CreateDataSource(cleanline, null);
OSGeo.OGR.Layer newdzxLayer = newdzxDS.CreateLayer(dzxLayer.GetName(), dzxLayer.GetSpatialRef(), dzxLayer.GetGeomType(), null);
for (int i = 0; i < dzxLayer.GetFeatureCount(0); i++)
{
OSGeo.OGR.Feature fileFeat = dzxLayer.GetFeature(i);
OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
double FeatLength = fileGeom.Length();
bool s1 = FeatLength > minLength && FeatLength < maxLength;
double featValue = fileFeat.GetFieldAsDouble("EVE");
bool s2 = featValue > minValue && featValue < maxValue;
bool isR = fileGeom.IsRing();
if (s1 && s2 && isR)
{
newdzxLayer.CreateFeature(fileFeat);
}
fileFeat.Dispose();
}
newdzxDS.Dispose();
dzxDS.Dispose();
Console.WriteLine("清理等值线完成！");
return(cleanline);
}
/// <summary>
/// 判断两个Featuer是否重复，两外接矩形相同位置的边差小于1时为true
/// </summary>
/// <param name="ori"></param>
/// <param name="next"></param>
/// <returns></returns>
public static bool isSame(OSGeo.OGR.Feature ori, OSGeo.OGR.Feature next, double maxCha = 1)
{
OSGeo.OGR.Envelope oriEnve = new OSGeo.OGR.Envelope();
ori.GetGeometryRef().GetEnvelope(oriEnve);
OSGeo.OGR.Envelope nextEnve = new OSGeo.OGR.Envelope();
next.GetGeometryRef().GetEnvelope(nextEnve);
if (Math.Abs(oriEnve.MaxX - nextEnve.MaxX) < maxCha && //外接矩形差
Math.Abs(oriEnve.MaxY - nextEnve.MaxY) < maxCha &&
Math.Abs(oriEnve.MinX - nextEnve.MinX) < maxCha &&
Math.Abs(oriEnve.MinY - nextEnve.MinY) < maxCha)
{
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// 获取与一个Feature有关的Raster参数,[0]offX,[1]offY,[2]sizeX,[3]sizeY
/// </summary>
/// <param name="Trans"></param>
/// <param name="aFeat"></param>
/// <returns></returns>
private static int[] subRasterInfo(double[] Trans, int xSize, int ySize, OSGeo.OGR.Feature aFeat)
{
//拿到Buffer Featuer的壳
OSGeo.OGR.Geometry bufGeom = aFeat.GetGeometryRef();
OSGeo.OGR.Envelope bufEnve = new OSGeo.OGR.Envelope();
bufGeom.GetEnvelope(bufEnve);
//判断壳是否超出全局范围，是则赋边界值
double maxX, minY;
StaticTools.imageToGeoSpace(Trans, xSize, ySize, out maxX, out minY);
if (bufEnve.MinX < Trans[0])
{
bufEnve.MinX = Trans[0];
}
if (bufEnve.MaxY > Trans[3])
{
bufEnve.MaxY = Trans[3];
}
if (bufEnve.MaxX > maxX)
{
bufEnve.MaxX = maxX;
}
if (bufEnve.MinY < minY)
{
bufEnve.MinY = minY;
}
//通过壳坐标拿到SubRaster的起点及行列数
var a = new int[4];
int leftUpX, leftUpY, rightDownX, rightDownY;
StaticTools.geoToImageSpace(Trans, bufEnve.MinX, bufEnve.MaxY, out leftUpX, out leftUpY);
StaticTools.geoToImageSpace(Trans, bufEnve.MaxX, bufEnve.MinY, out rightDownX, out rightDownY);
a[0] = leftUpX;
a[1] = leftUpY;
a[2] = Math.Abs(rightDownX - leftUpX);
a[3] = Math.Abs(leftUpY - rightDownY);
bufGeom.Dispose();
bufEnve.Dispose();
return(a);
}
/// <summary>
/// 通过线长,值 清理等值线
/// </summary>
/// <param name="dzx"></param>
/// <returns></returns>
static OSGeo.OGR.Layer cleanDZX(OSGeo.OGR.Layer dzxLayer)
{
//创建poly层
shpDataSet.deleteLayerByName("dzPoly");
OSGeo.OGR.Layer newdzxLayer = shpDataSet.CreateLayer("dzPoly", dzxLayer.GetSpatialRef(), OSGeo.OGR.wkbGeometryType.wkbPolygon, null);
//aue平均值，bzc标准差
double aue, bzc;
StaticTools.getBZC(dzxLayer, out aue, out bzc);
//清理过大和过小的高度值，取值范围为平均值两则，2倍的标准差，约为95.4%
double minValue = aue - bzc * sec;
double maxValue = aue + bzc * sec;
int FeatureCount = dzxLayer.GetFeatureCount(0);
StaticTools.msgLine("cleanDZX...");
for (int i = 0; i < FeatureCount; i++)
{
OSGeo.OGR.Feature fileFeat = dzxLayer.GetFeature(i);
OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
if (fileGeom.IsRing() &&//判断闭合
fileFeat.GetFieldAsDouble("EVE") > minValue &&
fileFeat.GetFieldAsDouble("EVE") < maxValue && //判断值
fileGeom.Length() > minLength &&
fileGeom.Length() < maxLength) //判断长度
{
OSGeo.OGR.Feature newFeat = polyFeat(fileGeom);
newdzxLayer.CreateFeature(newFeat);
StaticTools.progress((i + 1) * 100 / FeatureCount, $"{i} / {FeatureCount}");
}
}
StaticTools.progress(100);
if (IsDelete)
{
shpDataSet.deleteLayerByName(dzxLayer.GetName());
}
return(newdzxLayer);
}
/// <summary>
/// shpPoint To Point[]
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
public static Point[] shpPointtoPointG(string filePath)
{
var temp = new List <Point>();
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource ds = dr.Open(filePath, 0);
OSGeo.OGR.Layer fileLayer = ds.GetLayerByIndex(0);
int FeatCount = fileLayer.GetFeatureCount(0);
for (int i = 0; i < FeatCount; i++)
{
OSGeo.OGR.Feature fileFeature = fileLayer.GetFeature(i);
OSGeo.OGR.Geometry fileGeom = fileFeature.GetGeometryRef();
var newPoint = new Point();
newPoint.X = fileGeom.GetX(0);
newPoint.Y = fileGeom.GetY(0);
newPoint.Z = fileGeom.GetZ(0);
temp.Add(newPoint);
}
return(temp.ToArray());
}
public static void claenPoint(this OSGeo.OGR.Layer resLayer, double jiaodu, int cishu)
{
int featCount = resLayer.GetFeatureCount(0);
for (int i = 0; i < featCount; i++)
{
OSGeo.OGR.Feature oriFeat = resLayer.GetFeature(i);
OSGeo.OGR.Geometry oriGeom = oriFeat.GetGeometryRef();
OSGeo.OGR.Geometry subGeom = oriGeom.GetGeometryRef(0);
int pointCount = subGeom.GetPointCount();
Point[] aFeat = new Point[pointCount];
for (int c = 0; c < pointCount; c++)
{
aFeat[c].X = subGeom.GetX(c);
aFeat[c].Y = subGeom.GetY(c);
aFeat[c].Z = subGeom.GetZ(c);
}
OSGeo.OGR.Geometry newGeom = null;
if (aFeat.Length > cishu * 3)
{
newGeom = JID(aFeat, jiaodu, cishu);
}
else
{
oriFeat.Dispose();
continue;
}
if (newGeom != null)
{
oriFeat.SetGeometry(newGeom);
resLayer.SetFeature(oriFeat);
}
oriFeat.Dispose();
}
}
/// <summary>
/// 创建一个Buffer file,用于获取最小高度,juli是buffer的距离
/// </summary>
/// <param name="infile"></param>
/// <param name="juli"></param>
/// <returns></returns>
private static OSGeo.OGR.Layer bufferFile(OSGeo.OGR.Layer inLayer, int juli)
{
string buf = inLayer.GetName() + "buf";
shpDataSet.deleteLayerByName(buf);
OSGeo.OGR.Layer bufferLayer = shpDataSet.CreateLayer(buf, inLayer.GetSpatialRef(), inLayer.GetGeomType(), null);
int featCount = inLayer.GetFeatureCount(0);
for (int i = 0; i < featCount; i++)
{
OSGeo.OGR.Feature inFeat = inLayer.GetFeature(i);
OSGeo.OGR.Geometry inGeom = inFeat.GetGeometryRef();
OSGeo.OGR.Geometry outGeom = inGeom.Buffer(juli, 0);
OSGeo.OGR.Feature outFeat = new OSGeo.OGR.Feature(new OSGeo.OGR.FeatureDefn(""));
outFeat.SetGeometry(outGeom);
bufferLayer.CreateFeature(outFeat);
inFeat.Dispose();
outFeat.Dispose();
}
return(bufferLayer);
}
public void QueryShape(IGeometry pGeometry)
{
if (pGeometry == null)
{
return;
}
try
{
OSGeo.OGR.Geometry ogrGeometry = m_currentOGRFeature.GetGeometryRef();
// Flatten the geometry and ommit Z value until we add manual
// Z-value zupport
// See:
// https://github.com/RBURHUM/arcgis-ogr/issues/11
//
//
ogrGeometry.FlattenTo2D();
//export geometry from OGR to WKB
int wkbSize = ogrGeometry.WkbSize();
byte[] wkbBuffer = new byte[wkbSize];
ogrGeometry.ExportToWkb(wkbBuffer);
//import geometry from WKB to ESRI Shape
IWkb pWKB = pGeometry as IWkb;
pWKB.ImportFromWkb(wkbSize, ref wkbBuffer[0]);
pGeometry.SpatialReference = m_pDataset.SpatialReference;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(" Error: " + ex.Message);
pGeometry.SetEmpty();
}
}
/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object is used to retrieve from inputs and store in outputs.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
// See if gdal and ogr are working first.
string output = "";
try
{
GdalConfiguration.ConfigureOgr();
GdalConfiguration.ConfigureGdal();
output = "It works!";
}
catch (Exception e)
{
output = "{0} Exception caught. " + e;
}
string input = "";
DA.GetData(0, ref input);
var driver = OSGeo.OGR.Ogr.GetDriverByName("ESRI Shapefile");
if (driver == null)
{
output = "Driver is null";
}
else
{
var ds = driver.Open(input, 0);
if (ds == null)
{
output = "DataSource is null";
}
else
{
Grasshopper.DataTree <double> latitudesOut = new Grasshopper.DataTree <double>(), longitudesOut = new Grasshopper.DataTree <double>(), altitudesOut = new Grasshopper.DataTree <double>();
Grasshopper.DataTree <bool> cullPattern = new Grasshopper.DataTree <bool>();
long numberOfFeatures = 0;
var layer = ds.GetLayerByIndex(0);
string geoType = layer.GetGeomType().ToString();
numberOfFeatures = unchecked ((int)layer.GetFeatureCount(0));
bool parallel = false;
DA.GetData(1, ref parallel);
GH_Path path = new GH_Path();
OSGeo.OGR.Feature feature = null;
OSGeo.OGR.Geometry geo = null, ring = null;
double[] pointList = { 0, 0, 0 };
if (parallel == false)
{
if (geoType == "wkbPolygon")
{
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
feature = layer.GetFeature(i);
geo = feature.GetGeometryRef();
ring = geo.GetGeometryRef(0);
int pointCount = ring.GetPointCount();
cullPattern.Add(pointCount > 0 ? true : false, path);
for (int j = 0; j < pointCount; ++j)
{
ring.GetPoint(j, pointList);
latitudesOut.Add(pointList[1], path);
longitudesOut.Add(pointList[0], path);
altitudesOut.Add(pointList[2], path);
}
}
}
else if (geoType == "wkbLineString")
{
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
feature = layer.GetFeature(i);
geo = feature.GetGeometryRef();
int pointCount = geo.GetPointCount();
cullPattern.Add(pointCount > 0 ? true : false, path);
for (int j = 0; j < pointCount; ++j)
{
geo.GetPoint(j, pointList);
latitudesOut.Add(pointList[1], path);
longitudesOut.Add(pointList[0], path);
altitudesOut.Add(pointList[2], path);
}
}
}
else if (geoType == "wkbPoint" || geoType == "wkbPoint25D")
{
// TODO add reprojections if needed.
//OSGeo.OSR.CoordinateTransformation.TransformPoint( )
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
try
{
feature = layer.GetFeature(i);
geo = feature.GetGeometryRef();
geo.GetPoint(0, pointList);
latitudesOut.Add(pointList[1], path);
longitudesOut.Add(pointList[0], path);
altitudesOut.Add(pointList[2], path);
}
catch (Exception e)
{
output = "{0} Exception caught. " + e;
}
}
}
else
{
output = "Geometry type not implemented yet";
}
}
else
{
if (geoType == "wkbPolygon")
{
double[][] latMat = new double[numberOfFeatures][];
double[][] lonMat = new double[numberOfFeatures][];
double[][] altMat = new double[numberOfFeatures][];
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
feature = layer.GetFeature(i);
geo = feature.GetGeometryRef();
ring = geo.GetGeometryRef(0);
int pointCount = ring.GetPointCount();
latMat[i] = new double[pointCount];
lonMat[i] = new double[pointCount];
altMat[i] = new double[pointCount];
System.Threading.Tasks.Parallel.For(0, pointCount, j =>
{
layer.GetFeature(i).GetGeometryRef().GetPoint(j, pointList);
latMat[i][j] = pointList[1];
lonMat[i][j] = pointList[0];
altMat[i][j] = pointList[2];
});
if (pointCount > 0)
{
latitudesOut.AddRange(latMat[i], path);
longitudesOut.AddRange(lonMat[i], path);
altitudesOut.AddRange(altMat[i], path);
cullPattern.Add(true, path);
}
else
{
cullPattern.Add(false, path);
}
}
}
else if (geoType == "wkbLineString")
{
double[][] latMat = new double[numberOfFeatures][];
double[][] lonMat = new double[numberOfFeatures][];
double[][] altMat = new double[numberOfFeatures][];
OSGeo.OGR.Geometry[] g = new OSGeo.OGR.Geometry[numberOfFeatures];
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
feature = layer.GetFeature(i);
geo = feature.GetGeometryRef();
g[i] = geo;
int pointCount = geo.GetPointCount();
latMat[i] = new double[pointCount];
lonMat[i] = new double[pointCount];
altMat[i] = new double[pointCount];
System.Threading.Tasks.Parallel.For(0, pointCount, j =>
{
g[i].GetPoint(j, pointList);
latMat[i][j] = pointList[1];
lonMat[i][j] = pointList[0];
altMat[i][j] = pointList[2];
});
if (pointCount > 0)
{
latitudesOut.AddRange(latMat[i], path);
longitudesOut.AddRange(lonMat[i], path);
altitudesOut.AddRange(altMat[i], path);
cullPattern.Add(true, path);
}
else
{
cullPattern.Add(false, path);
}
}
}
else if (geoType == "wkbPoint" || geoType == "wkbPoint25D")
{
double[] latMat = new double[numberOfFeatures];
double[] lonMat = new double[numberOfFeatures];
double[] altMat = new double[numberOfFeatures];
System.Threading.Tasks.Parallel.For(0, numberOfFeatures, i =>
{
//feature = layer.GetFeature(i);
//geo = feature.GetGeometryRef();
layer.GetFeature(i).GetGeometryRef().GetPoint(0, pointList);
latMat[i] = pointList[1];
lonMat[i] = pointList[0];
altMat[i] = pointList[2];
});
for (int i = 0; i < numberOfFeatures; ++i)
{
path = new GH_Path(i);
latitudesOut.Add(latMat[i], path);
longitudesOut.Add(lonMat[i], path);
altitudesOut.Add(altMat[i], path);
}
}
else
{
output = "Geometry type not implemented yet";
}
}
DA.SetDataTree(1, latitudesOut);
DA.SetDataTree(2, longitudesOut);
DA.SetDataTree(3, altitudesOut);
DA.SetDataTree(4, cullPattern);
}
}
DA.SetData(0, output);
}
//private static Geometry ParseOgrGeometry(OgrGeometry ogrGeometry, WKBReader reader)
////private static Geometry ParseOgrGeometry(OgrGeometry ogrGeometry, IGeometryFactory factory)
//{
// if (ogrGeometry != null)
// {
// //Just in case it isn't 2D
// ogrGeometry.FlattenTo2D();
// var wkbBuffer = new byte[ogrGeometry.WkbSize()];
// ogrGeometry.ExportToWkb(wkbBuffer);
// //var geom = GeometryFromWKB.Parse(wkbBuffer, factory);
// var geom = reader.Read(wkbBuffer);
// if (geom == null)
// _log.Debug(t=> t("Failed to parse '{0}'", ogrGeometry.GetGeometryType()));
// return geom;
// ogrGeometry.GetGeometry()
// }
// return null;
//}
//private static FeatureDataRow LoadOgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, GeoAPI.Geometries.IGeometryFactory factory)
private static FeatureDataRow LoadOgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, OgrGeometryReader reader)
{
var values = new object[ogrFeature.GetFieldCount()];
for (var iField = 0; iField < ogrFeature.GetFieldCount(); iField++)
{
// No need to get field value if there's no value available...
if (!ogrFeature.IsFieldSet(iField))
{
continue;
}
int count;
switch (ogrFeature.GetFieldType(iField))
{
case OgrFieldType.OFTString:
case OgrFieldType.OFTWideString:
values[iField] = ogrFeature.GetFieldAsString(iField);
break;
case OgrFieldType.OFTStringList:
case OgrFieldType.OFTWideStringList:
values[iField] = ogrFeature.GetFieldAsStringList(iField);
break;
case OgrFieldType.OFTInteger:
values[iField] = ogrFeature.GetFieldAsInteger(iField);
break;
case OgrFieldType.OFTIntegerList:
values[iField] = ogrFeature.GetFieldAsIntegerList(iField, out count);
break;
case OgrFieldType.OFTReal:
values[iField] = ogrFeature.GetFieldAsDouble(iField);
break;
case OgrFieldType.OFTRealList:
values[iField] = ogrFeature.GetFieldAsDoubleList(iField, out count);
break;
case OgrFieldType.OFTDate:
case OgrFieldType.OFTDateTime:
case OgrFieldType.OFTTime:
Int32 y, m, d, h, mi, tz;
float s;
ogrFeature.GetFieldAsDateTime(iField, out y, out m, out d, out h, out mi, out s, out tz);
try
{
if (y == 0 && m == 0 && d == 0)
{
values[iField] = DateTime.MinValue.AddMinutes(h * 60 + mi);
}
else
{
values[iField] = new DateTime(y, m, d, h, mi, (int)s);
}
}
// ReSharper disable once EmptyGeneralCatchClause
catch { }
break;
default:
var iTmpField = iField;
_log.Debug(t => t("Cannot handle Ogr DataType '{0}'", ogrFeature.GetFieldType(iTmpField)));
break;
}
}
var fdr = (FeatureDataRow)table.LoadDataRow(values, true);
using (var gr = ogrFeature.GetGeometryRef())
{
//fdr.Geometry = ParseOgrGeometry(gr, factory);
fdr.Geometry = reader.Read(gr);
}
return(fdr);
}
/// <summary>
/// Query by geometry
/// </summary>
/// <param name="geo">input geometry</param>
/// <param name="layer">target layer</param>
/// <returns></returns>
public List <int> QueryByGeometry(OSGeo.OGR.Geometry geo, OSGeo.OGR.Layer layer, SpatialRel sr)
{
List <int> result = new List <int>();
try
{
OSGeo.OGR.Feature oFeature = null;
while ((oFeature = layer.GetNextFeature()) != null)
{
OSGeo.OGR.Geometry oGeometry = oFeature.GetGeometryRef();
switch (sr)
{
case SpatialQuery.SpatialRel.Undefined: break;
case SpatialQuery.SpatialRel.Intersects:
if (geo.Intersect(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Contains:
if (oGeometry.Contains(geo))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Crosses:
if (geo.Crosses(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Overlaps:
if (geo.Overlaps(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Touches:
if (geo.Touches(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.WithIn:
if (oGeometry.Within(geo))
{
result.Add((int)oFeature.GetFID());
}
break;
}
}
}
catch
{
throw;
}
return(result);
}
/// <summary>
/// 以前的代码
/// </summary>
/// <param name="dsmDs"></param>
/// <param name="oriFeat"></param>
/// <param name="bufFeat"></param>
/// <param name="subRasterOff_Size"></param>
private static void getMaxMinValue_(OSGeo.GDAL.Dataset dsmDs, OSGeo.OGR.Feature oriFeat, OSGeo.OGR.Feature bufFeat, int[] subRasterOff_Size)
{
//拿到当前Feature对应的栅格值（数组）
double[] rastValue = new double[subRasterOff_Size[2] * subRasterOff_Size[3]];
//拿到全局Transfrom
double[] Transfrom = new double[6];
dsmDs.GetGeoTransform(Transfrom);
//把SUBimg的值读进数组
dsmDs.GetRasterBand(1).ReadRaster(
subRasterOff_Size[0],
subRasterOff_Size[1],
subRasterOff_Size[2],
subRasterOff_Size[3],
rastValue,
subRasterOff_Size[2],
subRasterOff_Size[3],
0, 0);
OSGeo.OGR.Geometry oriGeom = oriFeat.GetGeometryRef();
string ddd = oriFeat.GetFieldAsString("MAX");
while (oriFeat.GetFieldAsString("MAX") == "")
{
//拿到数组中最大值的索引
int maxId = Array.IndexOf(rastValue, rastValue.Max());
//通过索引拿到空间坐标
double maxX, maxY;
StaticTools.indexToGeoSpace(maxId, subRasterOff_Size, Transfrom, out maxX, out maxY);
//把空间坐标写进Geomtry
OSGeo.OGR.Geometry maxGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbPoint);
maxGeom.AddPoint_2D(maxX, maxY);
//判断坐标是否在Feature中，在则把值写入对应字段，不在则把当前值改为平均值
if (maxGeom.Within(oriGeom))
{
oriFeat.SetField("MAX", rastValue.Max());
}
else
{
rastValue[maxId] = rastValue.Average();
}
}
string dd = oriFeat.GetFieldAsString("MIN");
while (oriFeat.GetFieldAsString("MIN") == "")
{
//拿到数组中最小值的索引
double ffdf = rastValue.Min();
int minId = Array.IndexOf(rastValue, rastValue.Min());
//通过索引拿到空间坐标
double minX, minY;
StaticTools.indexToGeoSpace(minId, subRasterOff_Size, Transfrom, out minX, out minY);
//把空间坐标写进Geomtry
OSGeo.OGR.Geometry minGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbPoint);
minGeom.AddPoint_2D(minX, minY);
//判断坐标是否在Feature中，在则把值写入对应字段，不在则把当前值改为平均值
OSGeo.OGR.Geometry bufGeom = bufFeat.GetGeometryRef();
if (minGeom.Within(bufGeom))
{
oriFeat.SetField("MIN", rastValue.Min());
}
else
{
rastValue[minId] = rastValue.Average();
}
}
double max = oriFeat.GetFieldAsDouble("MAX");
double min = oriFeat.GetFieldAsDouble("MIN");
oriFeat.SetField("HIGHT", max - min);
}
///通过坡度线筛选等值线
/// 1 清理等值线,长度\ 值域
/// 2 等值线转面
/// 3 根据坡度线求交等值线,并通过面积筛选
/// 输入文件路径,输出临时shp
///
/************************************** 清理等值线 *****************************************
* /// <summary>
* /// 通过线长,值 清理等值线
* /// </summary>
* /// <param name="filePath"></param>
* public static void cleanPolyline(string filePath)
* {
* //获取数据
* OSGeo.OGR.Ogr.RegisterAll();
* OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
* OSGeo.OGR.DataSource ds = dr.Open(filePath, 1);
* OSGeo.OGR.Layer fileLayer = ds.GetLayerByIndex(0);
*
* //获取Featuer数
* int featCount = fileLayer.GetFeatureCount(0);
*
* //求标准差
* // 1 拿到每个Featuer的Value
* double[] values = new double[featCount];
* for (int i = 0; i < featCount; i++)
* {
* OSGeo.OGR.Feature fileFeat = fileLayer.GetFeature(i);
* OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
* values[i] = fileFeat.GetFieldAsDouble("EVE");
* }
*
* // 2 求Values的平均值
* double aue = UsefullTools.myAue(values);
*
* // 3 求values与平均值差的平方和
* double pingFangHe = 0;
* for (int i = 0; i < featCount; i++)
* {
* pingFangHe += (values[i] - aue) * (values[i] - aue);
* }
*
* // 4 每个值与平均值的差相加,除Featuer数.再开方,得到标准差
* double bzc = Math.Sqrt(pingFangHe / featCount);
*
* double minLength = 80;
* double maxLength = 600;
* double minValue = aue - bzc;
* double maxValue = aue + bzc;
*
* for (int i = 0; i < featCount; i++)
* {
* OSGeo.OGR.Feature fileFeat = fileLayer.GetFeature(i);
* OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
* double featValue = fileFeat.GetFieldAsDouble("EVE");
* double FeatLength = fileGeom.Length();
* bool s1 = FeatLength < minLength || FeatLength > maxLength;
* bool s2 = featValue < minValue || featValue > maxValue;
* if (s1 || s2 || !fileGeom.IsRing())
* {
* fileLayer.DeleteFeature(i);
* }
* }
* string layerName = fileLayer.GetName();
* ds.ExecuteSQL("REPACK " + layerName, null, "");
* ds.Dispose();
* }
* /// <summary>
* /// 用来清理坡度线
* /// </summary>
* /// <param name="filePath"></param>
* public static void cleanPDPoly(string filePath)
* {
* //获取数据
* OSGeo.OGR.Ogr.RegisterAll();
* OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
* OSGeo.OGR.DataSource ds = dr.Open(filePath, 1);
* OSGeo.OGR.Layer fileLayer = ds.GetLayerByIndex(0);
*
* //获取Featuer数
* int featCount = fileLayer.GetFeatureCount(0);
*
* for (int i = 0; i < featCount; i++)
* {
* OSGeo.OGR.Feature fileFeat = fileLayer.GetFeature(i);
* OSGeo.OGR.Geometry fileGeom = fileFeat.GetGeometryRef();
* OSGeo.OGR.Geometry subGeom = fileGeom.GetGeometryRef(0);
* double FeatLength = subGeom.Length();
* bool s1 = FeatLength < 80 || FeatLength > 800;
*
* if (s1)
* {
* fileLayer.DeleteFeature(i);
* }
* }
* string layerName = fileLayer.GetName();
* ds.ExecuteSQL("REPACK " + layerName, null, "");
* ds.Dispose();
* }
*
* /******************************** 等值线转换为多边形 ***********************************************
*
*
* /// <summary>
* /// 等值线转为POLYGON
* /// </summary>
* /// <param name="filePath"></param>
* /// <returns></returns>
* public static string lineToPoly(string filePath)
* {
* OSGeo.OGR.Ogr.RegisterAll();
* OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
* OSGeo.OGR.DataSource lineDS = dr.Open(filePath,0);
* OSGeo.OGR.Layer lineLayer = lineDS.GetLayerByIndex(0);
* string savePath = filePath.Substring(0, filePath.LastIndexOf(".")) + "_ToPolygong.shp";
* //存在即删除
* if (System.IO.File.Exists(savePath))
* System.IO.File.Delete(savePath);
* //创建 一个新的数据源 for Polygon
* OSGeo.OGR.DataSource polyDS = dr.CreateDataSource(savePath, null);
* OSGeo.OGR.Layer polyLayer = polyDS.CreateLayer("", null, OSGeo.OGR.wkbGeometryType.wkbPolygon, null);
* OSGeo.OGR.FieldDefn fieldDf0 = new OSGeo.OGR.FieldDefn("LID", OSGeo.OGR.FieldType.OFTInteger);
* OSGeo.OGR.FieldDefn fieldDf1 = new OSGeo.OGR.FieldDefn("EVE", OSGeo.OGR.FieldType.OFTReal);
* polyLayer.CreateField(fieldDf0, 1);//ID
* polyLayer.CreateField(fieldDf1, 1);//Value
* for (int i = 0; i < lineLayer.GetFeatureCount(0); i++)
* {
* OSGeo.OGR.Feature lineFeat = lineLayer.GetFeature(i);
* OSGeo.OGR.Geometry lineGeom = lineFeat.GetGeometryRef();
* OSGeo.OGR.FeatureDefn featDF = new OSGeo.OGR.FeatureDefn("");
* OSGeo.OGR.Feature polyFeat = new OSGeo.OGR.Feature(featDF);
* OSGeo.OGR.Geometry polyGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbPolygon);
* OSGeo.OGR.Geometry subGeom = new OSGeo.OGR.Geometry(OSGeo.OGR.wkbGeometryType.wkbLinearRing);
* int u = lineGeom.GetPointCount();
* for (int s = 0; s < u; s++)
* {
* double x = lineGeom.GetX(s);
* double y = lineGeom.GetY(s);
* double z = lineGeom.GetZ(s);
* subGeom.AddPoint(x, y, z);
* }
* subGeom.CloseRings();
* polyGeom.AddGeometry(subGeom);
* polyFeat.SetGeometry(polyGeom);
* polyLayer.CreateFeature(polyFeat);
* }
* polyLayer.Dispose();
* polyDS.Dispose();
* lineDS.Dispose();
* return savePath;
* }
*
* /************************************ 获取坡度线 ***************************************************
*
* private void getPDlines()
* {
* string _inFilepath = @"D:\code\testDATA\test2.img";
* string _outFilePath = @"D:\code\outputfile\test2.img";
* string _outShpPath = @"D:\code\outputfile\test2";
* SlopeDem.SlopeDemObj.Slope(_inFilepath, _outFilePath);
* SlopeDem.SlopeDemObj.CreatePolygon(_inFilepath, _outShpPath);
*
* }
*
* /************************************ 对比并筛选 ***************************************************/
/// <summary>
/// 通过是否相交和面积差,获得最小面积差相交要素的ID数组
/// </summary>
/// <returns></returns>
private static int[] getMinIdGroup(string dzLine, string pdLing)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource dzDS = dr.Open(dzLine, 0);
OSGeo.OGR.DataSource pdDS = dr.Open(pdLing, 0);
OSGeo.OGR.Layer dzLayer = dzDS.GetLayerByIndex(0);
OSGeo.OGR.Layer pdLayer = pdDS.GetLayerByIndex(0);
int dzCount = dzLayer.GetFeatureCount(0);
int pdCount = pdLayer.GetFeatureCount(0);
//面积差值最小要素的ID数组
List <int> minIdG = new List <int>();
//坡度Layer中的每个要素,成为当前坡度参考线
for (int pdi = 0; pdi < pdCount; pdi++)
{
//Get 坡度要素
OSGeo.OGR.Feature pdFeat = pdLayer.GetFeature(pdi);
OSGeo.OGR.Geometry pdGeom = pdFeat.GetGeometryRef();
//前个面积差,循环结束将此值为最小面积差
double afterCha = -1;
//前个ID,循环结束将此值添加到minID中
int yesID = -1;
//查找与当前坡度要素有交集的等值线
for (int dzi = 0; dzi < dzCount; dzi++)
{
//get 等值线要素
OSGeo.OGR.Feature dzFeat = dzLayer.GetFeature(dzi);
OSGeo.OGR.Geometry dzGeom = dzFeat.GetGeometryRef();
if (dzGeom != null)
{
//判断是否相交
if (pdGeom.Intersect(dzGeom))
{
//求当前等值线要素与坡度线要素的面积差
double cha = Math.Abs(dzGeom.GetArea() - pdGeom.GetArea());
//如果前个面积差未被赋值,则把当前差赋值给前差,并记录ID
if (afterCha == -1)
{
afterCha = Math.Abs(dzGeom.GetArea() - pdGeom.GetArea());
yesID = dzi;
}
//如果前差已赋值,且当前差小于前差,则把当前差赋值给前差,并记录ID
else if (cha < afterCha)
{
afterCha = cha;
yesID = dzi;
}
}
}
}
//如果yesID被赋值,则把这个结果添加到ID数组中
if (yesID != -1)
{
minIdG.Add(yesID);
}
}
dzDS.Dispose();
pdDS.Dispose();
return(minIdG.ToArray());
}
private static FeatureDataRow OgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, GeoAPI.Geometries.IGeometryFactory factory)
{
FeatureDataRow fdr = table.NewRow();
Int32 fdrIndex = 0;
for (int iField = 0; iField < ogrFeature.GetFieldCount(); iField++)
{
//*** BEGIN FIX: Ensure fdrIndex is incremented if field value is not set and field is of a supported type.
bool valueAvailable = ogrFeature.IsFieldSet(iField);
OgrFieldType fieldType = ogrFeature.GetFieldType(iField);
// No need to get field value if there's no value available...
if (!valueAvailable)
{
// We need to increment the data row column index if this is a supported field type
// otherwise the next field will be written to the wrong column...
// We support all types except OFTBinary...
// Supported field types must be consistent with the code in ReadColumnDefinition and the switch case below...
if (fieldType != OgrFieldType.OFTBinary)
{
fdrIndex++;
}
continue;
}
//*** END FIX
//if (!ogrFeature.IsFieldSet(iField)) continue;
try
{
switch (ogrFeature.GetFieldType(iField))
{
case OgrFieldType.OFTString:
case OgrFieldType.OFTWideString:
{
fdr[fdrIndex++] = ogrFeature.GetFieldAsString(iField);
break;
}
case OgrFieldType.OFTStringList:
case OgrFieldType.OFTWideStringList:
{
fdr[fdrIndex++] = ogrFeature.GetFieldAsStringList(iField);
break;
}
case OgrFieldType.OFTInteger:
{
fdr[fdrIndex++] = ogrFeature.GetFieldAsInteger(iField);
break;
}
case OgrFieldType.OFTIntegerList:
{
int count = 0;
fdr[fdrIndex++] = ogrFeature.GetFieldAsIntegerList(iField, out count);
break;
}
case OgrFieldType.OFTReal:
{
fdr[fdrIndex++] = ogrFeature.GetFieldAsDouble(iField);
break;
}
case OgrFieldType.OFTRealList:
{
int count = 0;
fdr[fdrIndex++] = ogrFeature.GetFieldAsDoubleList(iField, out count);
break;
}
case OgrFieldType.OFTDate:
case OgrFieldType.OFTDateTime:
case OgrFieldType.OFTTime:
Int32 y, m, d, h, mi, s, tz;
ogrFeature.GetFieldAsDateTime(iField, out y, out m, out d, out h, out mi, out s, out tz);
try
{
if (y == 0 && m == 0 && d == 0)
{
fdr[fdrIndex++] = DateTime.MinValue.AddMinutes(h * 60 + mi);
}
else
{
fdr[fdrIndex++] = new DateTime(y, m, d, h, mi, s);
}
}
catch
{
throw;
}
break;
default:
Debug.WriteLine(string.Format("Cannot handle Ogr DataType '{0}', '{1}'", ogrFeature.GetFieldType(iField), iField));
break;
}
}
catch { }
}
using (var gr = ogrFeature.GetGeometryRef())
{
fdr.Geometry = ParseOgrGeometry(gr, factory);
gr.Dispose();
}
return(fdr);
}
private static FeatureDataRow OgrFeatureToFeatureDataRow(FeatureDataTable table, OSGeo.OGR.Feature ogrFeature, GeoAPI.Geometries.IGeometryFactory factory)
{
FeatureDataRow fdr = table.NewRow();
Int32 fdrIndex = 0;
for (int iField = 0; iField < ogrFeature.GetFieldCount(); iField++)
{
if (!ogrFeature.IsFieldSet(iField))
{
continue;
}
switch (ogrFeature.GetFieldType(iField))
{
case OgrFieldType.OFTString:
case OgrFieldType.OFTWideString:
fdr[fdrIndex++] = ogrFeature.GetFieldAsString(iField);
break;
case OgrFieldType.OFTStringList:
case OgrFieldType.OFTWideStringList:
break;
case OgrFieldType.OFTInteger:
fdr[fdrIndex++] = ogrFeature.GetFieldAsInteger(iField);
break;
case OgrFieldType.OFTIntegerList:
break;
case OgrFieldType.OFTReal:
fdr[fdrIndex++] = ogrFeature.GetFieldAsDouble(iField);
break;
case OgrFieldType.OFTRealList:
break;
case OgrFieldType.OFTDate:
case OgrFieldType.OFTDateTime:
case OgrFieldType.OFTTime:
Int32 y, m, d, h, mi, s, tz;
ogrFeature.GetFieldAsDateTime(iField, out y, out m, out d, out h, out mi, out s, out tz);
try
{
if (y == 0 && m == 0 && d == 0)
{
fdr[fdrIndex++] = DateTime.MinValue.AddMinutes(h * 60 + mi);
}
else
{
fdr[fdrIndex++] = new DateTime(y, m, d, h, mi, s);
}
}
catch { }
break;
default:
Debug.WriteLine(string.Format("Cannot handle Ogr DataType '{0}'", ogrFeature.GetFieldType(iField)));
break;
}
}
using (var gr = ogrFeature.GetGeometryRef())
{
fdr.Geometry = ParseOgrGeometry(gr, factory);
gr.Dispose();
}
return(fdr);
}
/// <summary>
/// Returns the geometry corresponding to the Object ID
/// </summary>
/// <param name="oid">Object ID</param>
/// <returns>geometry</returns>
public Geometry GetGeometryByID(uint oid)
{
using (OgrFeature ogrFeature = _ogrLayer.GetFeature((int)oid))
return(ParseOgrGeometry(ogrFeature.GetGeometryRef()));
}