cdm/src/main/java/ucar/nc2/ncml/AggregationNew.java
private DataType getCoordinateType() {
    List<Dataset> nestedDatasets = getDatasets();
    DatasetOuterDimension first = (DatasetOuterDimension) nestedDatasets.get(0);
    return first.isStringValued ? DataType.STRING : DataType.DOUBLE;
  }
private DataType getCoordinateType() {
    List<Dataset> nestedDatasets = getDatasets();
    DatasetOuterDimension first = (DatasetOuterDimension) nestedDatasets.get(0);
    return first.isStringValued ? DataType.STRING : DataType.DOUBLE;
  }
What is the data type of the aggregation coordinate ?

@return the data type of the aggregation coordinate