175007
Thailand/Miller, Nualchawee and Tom
(a) 1954 forest types (b) 1966 forest types
or 5 (c) 1968 forest types (d) 1972 forest types
versary
)ates
| Date
Only FIGURE 7.2 FOREST COVER DATA PLANES ILLUSTRATING THE MARKED INCREASE IN CYCLE
TIME IN THE TRANSITION OF FOREST COVER TO SHIFTING CULTIVATION. Each display em-
phasizes the areas of shifting cultivation in black. All 4 of these cover type maps were compiled for 9
cover types by very careful, detailed interpretation of low-altitude, black-and-white airphotos.