Fix comments for two functions.
// Informational methods.
/**
- * @return the lon of the lower left corner of this tile.
+ * @return the lon of the lower left corner of
+ * the 1x1 chunk containing this tile.
*/
inline int get_lon() const { return lon; }
/**
- * @return the lat of the lower left corner of this tile.
+ * @return the lat of the lower left corner of
+ * the 1x1 chunk containing this tile.
*/
inline int get_lat() const { return lat; }