code: public Envelope getBounds() throws Exception {
          checkMetadata();
          String boundsWSEN = metadataMap.get("bounds");
          String[] split = boundsWSEN.split(",");
          double w = Double.parseDouble(split[0]);
          double s = Double.parseDouble(split[1]);
          double e = Double.parseDouble(split[2]);
          double n = Double.parseDouble(split[3]);
          return new Envelope(w, e, s, n);
      }
docs: Get the db envelope.
  
  @return the Envelope of the dataset.
  @throws Exception