— 1484 -
From the other projects we will here only give two examples of classified
images.
Forest inventory at Alanäset
The first example (Figure 5) is from a forest test region in the middle of
Sweden at Alanäset. Eight wave length bands - the two UV-bands are exclu-
ded - have been used. The scene is recorded July 8 from 6000 metres. In
the classification procedure 32 test areas were utilized. The used classi-
fication system is given in Table 4.
Table 4. Classification system in forest inventory from airborne
MSS data at Alanäset, Jämtland, Sweden.
1. Coniferous forest
1.1 Pine, old, growing
1.2 Pine, old, not growing
1.3 Pine, sparse
1.4 Spruce, old and dense
1.5 Coniferous, young and dense
Regeneration area
2.1 Clear cut
2.2 Replanted coniferous, sparse
2.3 Replanted coniferous, sparse
and dominated by deciduous
shrubs
. Deciduous forest
4. Barren Land
4.1 Wet Land, drainable
4.2 Wet Land, not drainable
4,3 Bedrock outcrops
Hydography
Agricultural Land
. Rejects
The evaluation of the classification results is going on. Control of accu-
racy for discriminating old growing pine against old not growing pine shows,
however, that the spectral differences are more dependent upon the ground
vegetation within the stands.
Land use mapping at Linkôping
In the Linkóping area land use mapping
has been performed by automatic
classification of airborne MSS data from an altitude of 6000 m - 1 pixel
=15mx 15 m -. The classification system used in the Landsat study of:
the same area (Table 2) has been slightly modified. 34 classes have been
used in the classification procedure, but only 13 classes have been re-
presented in the color image in Figure 7 showing only a part of the test
area at Sturefors, Linkoping. Compare with the classification results
from Landsat data in Figure 4. Last Figure =
Figure 7: Land use map produced by automatic classification of MSS data from
aircraft. Approximate scale 1:15 000. Geometrical corrections are not performed.
Legend: Light yellow - agicultural land, Dark yellow = meadow, Dark green -
pine forest, Blue-green = spruce forest, Medium green = deciduous forest,
Light green = hardwood forest, Light brown
= Young coniferous, Dark brown =
replanted clear cuts, Light grey = not replanted clear cuts, Pink = bedrock,
Light blue = lakes and streams, Dark blue
= reeds, Dark grey = rejects.