/******************************************************************************/
/* __STAND                                                                    */
/*                                                                            */
/* a basic description of stand level                                         */
/*                                                                            */
/* revised:                                                                   */
/*    gpj  july  9, 2001                                                      */
/*    gpj  july 10, 2001                                                      */
/*    gpj  september 27, 2001                                                 */
/******************************************************************************/

struct __STAND 
{
    unsigned short  validated;      /* has this tree record been
                                       validated for use by model? */

    // stand description
    unsigned long  stand_id;   // stand identifier
    double         area;       // area represented by this stand in user 
                               // defined measurement system
    unsigned short units;      // measurement system: 1=metric, 2=english

    // age
    unsigned int   total_age;  // age from germination
    unsigned int   bh_age;     // breast height age (age at 4.5 feet)
    unsigned int   plantation_age;   // age from planting

    // productivity measures
    double         slope;      // slope in degrees from horizontal
    double         aspect;     // aspect as an azimuth
    double         elevation;  // elevation from mean sea-level in user 
                               // defined meas. sys.
};