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The first sample area came from a polygon of marsh north of a lake and included a
large amount of vegetation.
Figure 45: Vector data for marsh test 1
The sampling for these was from separate areas across the imagery used in the
study to try and achieve as consistent a picture as possible of this type of area. The
co-ordinates of the area were extracted from the vector data (above) in ITM
projection and used to clip the polygon from the raster imagery (below). As with
all other samples in this test –the final results were adjusted by lowering the pixel
count so as to account for plank pixels created in the output GeoTiff of the
irregular clipped polygon:
120