Table 14 
Estimation of stand mean heights in air photos. 
  
  
5 1:16 000 1:26 000 1:33 000 
2 Sn A ~~ T Salz r= TS Sn L 7 EN : =>] = % 
o RT oe Cod LQ Rd oa 2 Dt = |. 2 
= ES ET ET 
| 
KA 41 +1.4| + 2.6| 41 + 0.0) + 2.7 
Hällnäs 2. 33 12} + 383| 39 | 19 + 45 | 117 
3. 42 16| +22] 41 | -05) + 22 
1. 1.47 02|::41, 45 | -20,| c 8.5, 48 0.2 +38 
Ostad 2. | 45 05|+37| 43 | -08| + 38| 48 | -2.6, + 88| 154 
3.147 10 +32) 46 04 +26 38 | +00 +26 
1. | 31 021+ 451 30 +07: +40} 32 | +18] + 5.1 
Skedvi 2. 32 0.7 +83 29 -03/ + 3.6/| 31 13/+ 32) 1832 
8. B83 if +02) + 1.91 31 +08 +22| 33 | +05| + 20 
Systematic error 
(in metres) 
Table 15 
in estimation of stand mean heights. 
  
  
  
  
  
26 
Interpreter I Interpreter II Interpreter III | AN 
Scale | inter- 
m ; < | All to- N ^ | Allto- à ^ |All to-| pre- 
H S 0 gether H S O gelher H S 0 gether ters 
: 16 000 -0.2/ — 0.2/ — 0.2 0.7, - 05 — 0.6 + 0.2 — 1.0 — 0.5 0.4 
: 26 000 + 1.4 + 0.7 + 2.0i + 1.5 | — 0.2 — 0.3; — 0.8 — 0.8 1.6 + 0.8 — 0.4 — 0.7 +0 
:330000 0.0 +18 — 0.2 +04] —1.9 — 1.3 — 2.6 — 2.0 08 +05 0.0|+ 0. 0.5 
Table 16 
Mean square errors (in metres) in estimation of stand mean heights. 
Interpreter I Interpreter 11 Interpreter III All 
Scale inter- 
i : ^ AM to- , : ^ All to : ^ AM to- | pre- 
| H 5 0 gether H 5 O gether H 3 0 gether | ters 
:16000| — |+ 45 + 4.11+ 43, — +33 +37 +35) — |+ 19/+ 32 + 2.7) +36 
1 : 26 000| + 2.6 + 4.0 + 3.5 + 3.4 + 3.3 + 3.6 + 3.8 + 3.6 + 2.2 + 22] 2.6:+ 2.4) + 32 
: 33 000| + 2.7 + 83.1 + 3.8 + 3.3 + 4.5 + 3.2 + 3.8:+ 3.9 | + 2.2/+ 2.0/+ 2.6/+ 2.2 3.2