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The peak for the green colour band, around 190 on the converted greyscale, means<br />
that the slightly higher peak for the red colour band could be accepted as variance<br />
within the pasture range.<br />
The fourth sample that was used to test the expected ranges for the presence of<br />
pasture from automatically extracted polygons was an area to the south east of the<br />
image which was close to farm buildings and used as pasture, giving a relatively<br />
clean example of the land use type to test the algorithm against:<br />
Figure 41: Vector data for rough pasture test 4<br />
The above screenshot from the vector data (farm buildings are to the right), shows<br />
how the process being developed in this study uses known controlled coordinates<br />
to crop the imagery into a mosaic of tiles for processing (same area below);<br />
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