cdm/src/main/java/ucar/nc2/iosp/grads/GradsEnsembleDimension.java
protected double[] makeLevelValues() {
        double[] vals = new double[getSize()];
        for (int i = 0; i < getSize(); i++) {
            vals[i] = i;
        }
        return vals;
    }
protected double[] makeLevelValues() {
        double[] vals = new double[getSize()];
        for (int i = 0; i < getSize(); i++) {
            vals[i] = i;
        }
        return vals;
    }
Make the level values from the specifications

@return the level values