public static bool CreateSignaturefile(IRasterDataset pRasterDataset, int classCount, string gsgPath)
 {
     IGeoDataset pGeo = pRasterDataset as IGeoDataset;
     IMultivariateOp pMultivarateOp = new RasterMultivariateOpClass();
     // string gsgPath = "e:\\222.gsg";
     pMultivarateOp.IsoCluster(pGeo, gsgPath, classCount);
     return true;
 }