gery
00.
‘es
Ground map
Landsat B+W
Area in Hectares
Landsat false
map colour map
Area tage Area Sage Area %age
Teak 13050 67% 14725 74% 12800 66%
Miscellaneous 4900 25% 3950 20% 5200 26%
Cultivation 1550 8% 1200 6% 1600 8%
Total 19500 18875 19600
Percentage Difference
Teak +1675 +12,8% <250 -1,4%
Miscellaneous -950 -19,4% +300 +6,1%
Cultivation -350. -22,6% *50 *3,2$
Total *375 +1,93 +100 +0,5%
The area figures indicate that there is negligible difference
in the total areas of various cover types as measured on ground
map and Landsat false colour map. While comparing the Landsat
black and white imagery map with the ground map, it is noticed
that area under teak forests comes out to be 7% more and under
miscellaneous forests and cultivations it comes out to be less
by 5% and 2% respectively. The reasons may be the same as given
in case of Mahadevpur forests.
Conclusions:
The results obtained from visual interpretation of black and
white panchromatic aerial photography and landsat imagery
black and white and in false colour reveal that:
(i) Small scale photos can be used effectively in seperating
productive forests from non productive forests;
(ii) on the large scale photographs (1.10.000) forests can
further be stratified based on important species
compositon, height and density classes which is useful
in preparation of forest inventories more economical;
(iii) the best tonal contrast among the images of different
vegetation and cover types is shown by the false colour
imagery;
(iv) among the 4 MSS bands of landsat imagery, band 5 shows
best tonal contrast. This hand seems to be best suited
for forestry interpretation of tropical dry deciduous
forests;