Please click on the geographic/temporal area(s) of interest to specify the time 2 sample.The difference between time 2 sample and the most recent previous sample (time 1) will be calculated for the comparison attribute.Comparisons are made collectively across all specified groups.Do not choose more than one group for a given state or the tool will return invalid results.To add or subtract to the list of selected items hold down the control key while clicking on individual items in the drop-down list.

Use 'p', 'c' and 't' to specify the plot, condition, and tree tables,
respectively. Tree tables are not valid in the denominator filters for
per acre estimates.

Filter for time 2 numerator (numerator_constraint_y_time2)

(example: to limit the retrieval to National Forest
ownership put "and c.owncd=11" in the textbox)

Filter for time 2 denominator
(denominator_constraint_x_time2)

(example: to limit the retrieval to National Forest
ownership put "and c.owncd=11" in the textbox)

Filters Time 1:

Use 'p1', 'c1' and 't1' to specify the plot, condition, and tree
tables, respectively. Tree tables are not valid in the denominator
filters for per acre estimates.

Filter for time 1 numerator (numerator_constraint_y_time1)

(example: to limit the retrieval to National Forest
ownership put "and c1.owncd=11" in the textbox)

Filter for time 1 denominator
(denominator_constraint_x_time1)

(example: to limit the retrieval to National Forest
ownership put "and c1.owncd=11" in the textbox)