/// <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);
}