/// <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++;
});
}