cdm/src/main/java/ucar/nc2/ft2/coverage/adapter/DtCoverageDataset.java
static public DtCoverageDataset open(DatasetUrl durl, Set<NetcdfDataset.Enhance> enhanceMode) throws java.io.IOException {
    NetcdfDataset ds = ucar.nc2.dataset.NetcdfDataset.acquireDataset(null, durl, enhanceMode, -1, null, null);
    return new DtCoverageDataset(ds, null);
  }
static public DtCoverageDataset open(DatasetUrl durl, Set<NetcdfDataset.Enhance> enhanceMode) throws java.io.IOException {
    NetcdfDataset ds = ucar.nc2.dataset.NetcdfDataset.acquireDataset(null, durl, enhanceMode, -1, null, null);
    return new DtCoverageDataset(ds, null);
  }
Open a netcdf dataset, using NetcdfDataset.defaultEnhanceMode plus CoordSystems
and turn into a DtCoverageDataset.

@param durl    netcdf dataset to open, using NetcdfDataset.acquireDataset().
@param enhanceMode open netcdf dataset with this enhanceMode
@return GridDataset
@throws java.io.IOException on read error
@see ucar.nc2.dataset.NetcdfDataset#acquireDataset