/// <summary>
/// 整合坡度多边形(Polygon),并清除重叠部份
/// </summary>
/// <param name="subPdx"></param>
/// <returns></returns>
public static string zhengHePdx(List <string> subPdx)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
string res = StaticTools.tempFilePath("shp", "整合");
OSGeo.OGR.DataSource newDS = dr.CreateDataSource(res, null); //////////////待关闭1 has
Layer newLayer = newDS.CreateLayer("podu", null, OSGeo.OGR.wkbGeometryType.wkbPolygon, null); //////////////待关闭2
for (int i = 0; i < subPdx.Count; i++)
{
OSGeo.OGR.DataSource ds = dr.Open(subPdx[i], 0);//////////////待关闭3 has
Layer layer = ds.GetLayerByIndex(0);
for (int j = 0; j < layer.GetFeatureCount(0); j++)
{
OSGeo.OGR.Feature subFeat = layer.GetFeature(j);
OSGeo.OGR.Geometry subGeom = subFeat.GetGeometryRef();
double thisArea = subGeom.GetArea();
// 清理过小Featuer
if (thisArea > 200)
{
newLayer.CreateFeature(layer.GetFeature(j));
}
}
ds.Dispose();
Console.WriteLine("完成整合{0}/{1}", i + 1, subPdx.Count);
}
newDS.Dispose();
cleanPdx(res);
return(res);
}
/// <summary>
/// 子线程提取轮廓线ID
/// </summary>
/// <param name="pdFeat"></param>
/// <param name="dzx"></param>
async static void select(Feature pdFeat, string dzx)
{
await Task.Run(() =>
{
double afterCha = -1;
int yesID = -1;
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Driver dr = OSGeo.OGR.Ogr.GetDriverByName("ESRI shapefile");
OSGeo.OGR.DataSource dzDS = dr.Open(dzx, 0);
OSGeo.OGR.Layer dzxLayer = dzDS.GetLayerByIndex(0);
OSGeo.OGR.Geometry pdGeom = pdFeat.GetGeometryRef();
int dzCount = dzxLayer.GetFeatureCount(0);
for (int dzi = 0; dzi < dzCount; dzi++)
{
OSGeo.OGR.Feature dzFeat = dzxLayer.GetFeature(dzi);
OSGeo.OGR.Geometry dzGeom = dzFeat.GetGeometryRef();
if (pdGeom.Intersect(dzGeom))
{
double cha = Math.Abs(dzGeom.GetArea() - pdGeom.GetArea());
if (afterCha == -1)
{
afterCha = cha;
yesID = dzi;
}
else if (cha < afterCha)
{
afterCha = cha;
yesID = dzi;
}
}
dzGeom.Dispose();
dzFeat.Dispose();
}
if (yesID != -1)
{
minIdG.Add(yesID);
}
dzDS.Dispose();
dzxLayer.Dispose();
pdGeom.Dispose();
pdFeat.Dispose();
tickTime++;
});
}
/************************************* 判断两个Featuer是否重复 *************************************************/
/// <summary>
/// 判断两个Featuer是否重复，ori 当前Feat，next 目标Feat
/// </summary>
/// <param name="ori"></param>
/// <param name="next"></param>
/// <returns></returns>
public static bool isSame(OSGeo.OGR.Feature ori, OSGeo.OGR.Feature next, double fanWei = 0.1)
{
OSGeo.OGR.Ogr.RegisterAll();
OSGeo.OGR.Geometry oriGeom = ori.GetGeometryRef();
OSGeo.OGR.Envelope oriEnve = new OSGeo.OGR.Envelope();
oriGeom.GetEnvelope(oriEnve);
OSGeo.OGR.Geometry nextGeom = next.GetGeometryRef();
OSGeo.OGR.Envelope nextEnve = new OSGeo.OGR.Envelope();
nextGeom.GetEnvelope(nextEnve);
double oriArea = oriGeom.GetArea();
double nextArea = nextGeom.GetArea();
bool res =
Math.Abs(oriEnve.MaxX - nextEnve.MaxX) < fanWei && //外接矩形差
Math.Abs(oriEnve.MaxY - nextEnve.MaxY) < fanWei &&
Math.Abs(oriEnve.MinX - nextEnve.MinX) < fanWei &&
Math.Abs(oriEnve.MinY - nextEnve.MinY) < fanWei;
//面积？ && Math.Abs(oriArea - nextArea) < 0.1;
oriGeom.Dispose();
oriEnve.Dispose();
nextGeom.Dispose();
nextEnve.Dispose();
return(res);
}
