visad/src/main/java/ucar/nc2/iosp/gempak/GempakLookup.java
public final GridParameter getParameter(GridRecord gr) {
    String name = gr.getParameterName();
    GridParameter gp = GempakGridParameterTable.getParameter(name);
    if (gp != null) {
      return gp;
    }
    return new GridParameter(0, name, name, "");
  }
public final GridParameter getParameter(GridRecord gr) {
    String name = gr.getParameterName();
    GridParameter gp = GempakGridParameterTable.getParameter(name);
    if (gp != null) {
      return gp;
    }
    return new GridParameter(0, name, name, "");
  }
gets parameter table, then grib1 parameter based on number.

@param gr GridRecord
@return Parameter