Trees marked STANDING DEAD are surveyed until they fall over, at which point they are supposed to get one more survey record with STANDING_DEAD_CD == 0.
When this happens, we want to extend the interpolated values for HT/DIA to the midpoint of the resurvey period in which the tree fell over. (Currently the values stop in the last survey year in which it is standing dead).
Trees marked STANDING DEAD are surveyed until they fall over, at which point they are supposed to get one more survey record with STANDING_DEAD_CD == 0.
When this happens, we want to extend the interpolated values for HT/DIA to the midpoint of the resurvey period in which the tree fell over. (Currently the values stop in the last survey year in which it is standing dead).