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The peak for the green colour band, around 190 on the converted greyscale, means
that the slightly higher peak for the red colour band could be accepted as variance
within the pasture range.
The fourth sample that was used to test the expected ranges for the presence of
pasture from automatically extracted polygons was an area to the south east of the
image which was close to farm buildings and used as pasture, giving a relatively
clean example of the land use type to test the algorithm against:
Figure 27: Vector data for pasture test 4
The above screen grab from the vector data (farm buildings are to the right),
shows how the process being developed in this study uses known controlled
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