NT></P>
<PRE>typedef struct {
  double lat;                   /**&lt; Latitude in decimal degrees */
  double lon;                   /**&lt; Longitude in decimal degrees */
} MTKt_GeoCoord;

typedef struct {
  double x;                     /**&lt; Som X in meters */
  double y;                     /**&lt; Som Y in meters */
} MTKt_SomCoord;

typedef struct {
  MTKt_GeoCoord ulc;            /**&lt; Upper left corner of region in geographic */
  MTKt_GeoCoord urc;            /**&lt; Upper right corner of regi