gitude in decimal degrees */
} MTKt_GeoCoord;

typedef struct {
  int block_number;             /**&lt; Block number */
  MTKt_GeoCoord ulc;            /**&lt; Upper left corner block coordinate */
  MTKt_GeoCoord urc;            /**&lt; Upper right corner block coordinate */
  MTKt_GeoCoord ctr;            /**&lt; Center block coordinate */
  MTKt_GeoCoord lrc;            /**&lt; Lower right corner block coordinate */
  MTKt_GeoCoord llc;            /**&lt; Lower left corner block coordinate */
} MTKt_GeoB