/**&lt; GCTP zone code */
  long spherecode;              /**&lt; GCTP sphere code */
  double projparam[15];         /**&lt; GCTP projection parameters */
  double ulc[2];                /**&lt; MISR ulc_xy of first block */
  double lrc[2];                /**&lt; MISR lrc_xy of first block */
  int nblock;                   /**&lt; MISR number blocks */
  int nline;                    /**&lt; MISR number lines */
  int nsample;                  /**&lt; MISR number samples */
  float reloffset[179];       