code: public void fillMetadata( float n, float s, float w, float e, String name, String format, int minZoom, int maxZoom )
              throws Exception {
          // type = baselayer
          // version = 1.1
          // descritpion = name
          String query = toMetadataQuery("name", name);
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("description", name);
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("format", format);
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("minZoom", minZoom + "");
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("maxZoom", maxZoom + "");
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("type", "baselayer");
          database.executeInsertUpdateDeleteSql(query);
          query = toMetadataQuery("version", "1.1");
          database.executeInsertUpdateDeleteSql(query);
          // left, bottom, right, top
          query = toMetadataQuery("bounds", w + "," + s + "," + e + "," + n);
          database.executeInsertUpdateDeleteSql(query);
      }
docs: Populate the metadata table.
  
  @param n nord bound.
  @param s south bound.
  @param w west bound.
  @param e east bound.
  @param name name of the dataset.
  @param format format of the images. png or jpg.
  @param minZoom lowest zoomlevel.
  @param maxZoom highest zoomlevel.
  @throws Exception