GVII-40 
PHOTOGRAMMETRIC ENGINEERING 
Table 1 
Classification of Stand Size Survey in Taiwan 
For photo plots 
(Scale: 1/4,000-1/10,000) 
For forest type and stand size mapping 
(Scale: 1/40,000-1/50,000) 
Code 
Volume (cu. m./ha.) 
Map symbol 
Volume (cu. m./ha.) 
00 
0- 49.9 
0 
0- 99.9 
05 
50- 99.9 
1 
100-299.9 
10 
100-149.9 
3 
300-499.9 
15 
150-199.9 
5 
500 and over 
20 
200-299.9 
30 
300-399.9 
40 
400-499.9 
50 
500-699.9 
70 
700 and over 
With respect to land use aspects, the land use and/or cover types were in 
terpreted on the photographs, as shown in Table 2. 
Table 2 
Interpretation of Land Use and Cover Types Survey in Taiwan 
Symbol 
Description 
G Tall or short grasses excluding commercial bamboo groves 
Cp Continuously cultivated land primarily managed for, or already installed with 
facilities capable of paddy rice production 
Cd 
All cultivated land other than Cp as described above, thus including all dryfarming 
land under either continuous, intermittent or shifting cultivation 
U 
Urban or residential use 
W 
Water areas including lakes, rivers, and reservoirs 
Lp 
Bare land such as denuded and/or badly eroded land that is capable of being 
planted 
Lu 
Bare land such as landslides, unstable alluvium and bare rock that is not capable 
of being planted 
Five soil and water conservation problem areas on nonforest land were 
recognized on the photographs. 
Lands with no appreciable conservation problem. 
Nonforest lands with minor to moderate conservation 
problem. 
Nonforest lands that are marginal. In this group are 
lands where continuous farming causes serious soil losses 
unless intensive treatment and conservation practices 
are followed. 
Problem area I 
Problem area II 
Problem area III 
Problem area IV Nonforest lands with sufficient soil material for reforesta 
tion. Special care should be taken in establishment and 
management of such forests to prevent water concentra 
tion and check soil erosion.