National User’s Group Meeting
Houston, Texas
John Vissage
U. S. Forest Service
Northern Research Station
Saint Paul, MN
[email protected]
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Any annual inventory after the first one
Same plot footprint at the same place
Account for trees measured on plot that was
forested at prior visit
Isn’t ‘remeasured’ from a periodic survey
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If it can go wrong it will go wrong
If it can’t go wrong it will go wrong
“
Data that should not
change, changes.
Tree species
Reserved Class
Site Productivity Class
”
Data that should change,
changes in a strange
way.
DBH/DIA shrinks
Total height gets shorter
Rotten cull decreases
Ownership
On-line tools
FIDO and EVALIDator
FIA Data Mart
Produce estimates of growth,
removals, and mortality
Allows users to download
FIADB tables
EVALIDator produces
growth, removals, and
mortality estimates by
current and prior
attributes
Removals by previous land use and current land use,
East Texas, 2008 (From EVALIDator)
Previous
land use Total
Total
NonCensus
water
Reserved Other
Timberland Forestland forestland Nonforest
Census
water
721,272,463 643,744,632
-
358,794
73,654,880 3,291,488 222,669
Timberland 721,272,463 643,744,632
Reserved
Forestland
Other
forestland
-
-
358,794
73,654,880 3,291,488 222,669
Nonforest
Non-Census
water
Census
water
Hazardous
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Removals of growing stock from timberland by current
land use, East Texas, 2008
Nonforest
10%
Non-Census
water
1%
Other forest
land
0%
0%
Timberland
89%
Census Water
0%
Estimate type Net growth of growing-stock on timberland (cuft per year)
Statecd/EVALID(s):
RSCD=33 EVALID=480803 TEXAS(EAST) 2008
Page variable=None
Row variable=Previous stand origin
Column variable=Stand origin
Estimate:
Stand
origin
Previous
stand origin
Total
Natural stands
Clear evidence of
artificial regeneration
Other
Total
928,848,135
572,038,362
349,671,772
7,138,002
Natural
stands
487,279,535
453,855,613
28,585,398
4,838,524
Clear
evidence of
artificial
regeneration
366,799,107
44,870,631
319,628,998
2,299,477
74,769,493
73,312,118
1,457,375
-
Other
Average annual net growth of growing stock by
previous stand origin
8%
Natural stands
40%
52%
Clear evidence of
artificial regeneration
Other
Average annual net growth of growing stock by
current stand origin
1%
Natural stands
38%
Clear evidence of
artificial regeneration
61%
Other
Now What?
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PREV_PLOT_CN (previous plot sequence
number)
PREV_SBP_CN
PREV_SIT_CN
PREV_STATUS_CD
PREV_TRE_CN
PREVCOND
PREVDIA
(Subplot condition change matrix)
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CN (sequence number)
STATECD
SUBP
SUBPTYP
PLT_CN
CONDID
PREV_PLT_CN
PREVCOND
SUBPTYP_PROP_CHNG
Portion of change matrix table, Minnesota 2008
Past
Condition
Status
Current
stand –size
class
Past
Current
stand –
condition
size class status
Plot area
Estimate
Count
1
2
1
3 607046.3149
733
169.2647
1
1
1
2
274577.301
337
77.0061
1
3
1
1 155524.0044
191
41.947475
1
1
1
5 52143.18745
55
12.2335
Forest area change by past and current stand size class, Minnesota 2008
Past stand
size class
Current stand size class
Sawtimber
Poletimber
Total
Seedling sapling
Nonstocked
Other
Sawtimber
3,578,440
274,577
389,032
52,143
82,805
4,376,998
807,157
4,697,077
607,046
39,338
84,252
6,234,870
155,524
668,194
4,311,141
55,871
100,285
5,291,015
15,422
14,809
93,565
56,522
47,601
227,919
276,398
295,435
616,656
69,185
4,832,940
5,950,093
6,017,441
273,059
Poletimber
Seedling –
Sapling
Nonstocked
Other
1,257,674
Total
314,944
17,388,476
Annual-to-annual
remeasurement
Periodic-to-annual
accounting
Annual Inventory
initial installation
Periodic data
--Example 4.15 Estimate area change (acres) by condition status and stand size at two points in time, East Texas
SELECT c_past.cond_status_cd past_cond_status_cd,
c_past.stdszcd past_stdszcd,
c.cond_status_cd current_status_cd,
c.stdszcd current_stdszcd,
SUM(pop_stratum.expns * CMX.subptyp_prop_chng / 4 *
decode(c.prop_basis,
'MACR',
pop_stratum.adj_factor_macr,
pop_stratum.adj_factor_subp) -- expression from the ref_pop_attribute table
) estimate,
count(*) COUNT,
SUM(CMX.subptyp_prop_chng / 4) PLOT_AREA
FROM cond
c,
plot
p,
pop_plot_stratum_assgn,
pop_stratum,
pop_estn_unit,
pop_eval,
pop_eval_typ
pet,
pop_eval_grp,
cond
C_PAST,
subp_cond_chng_mtrx
CMX
WHERE p.cn = c.plt_cn
and pet.eval_typ = 'EXPGROW'
AND (c.cond_status_cd = 1 or c_past.cond_status_cd = 1)
AND pop_plot_stratum_assgn.plt_cn = p.cn
AND pop_plot_stratum_assgn.stratum_cn = pop_stratum.cn
AND pop_estn_unit.cn = pop_stratum.estn_unit_cn
AND pop_eval.cn = pop_estn_unit.eval_cn
AND pop_eval.cn = pet.eval_cn
AND pet.eval_grp_cn = pop_eval_grp.cn
AND pop_eval_grp.eval_grp = 272008 -- the desired evaluation group must be specified.
AND p.prev_plt_cn = C_PAST.plt_cn
AND CMX.PREV_PLT_CN = C_PAST.PLT_CN
AND CMX.prevcond = C_PAST.condid
AND CMX.condid = c.condid
AND ((CMX.SUBPTYP = 3 and c.prop_basis = 'MACR')
or (CMX.SUBPTYP = 1 and c.prop_basis = 'SUBP'))
group by c_past.cond_status_cd,
c_past.stdszcd,
c.cond_status_cd,
c.stdszcd