Geography Reference
In-Depth Information
intervals between 10 m and 20 m. Analysis of this area and gradient range
would require between 50 and 260 individual measurements for each potential
path even if this was confined to a width of only 500 metres. Therefore, the
slope gradient tool is more efficient in research hours and provides acceptable
accuracy for route options that can be used with other data such as soil types,
vegetation and hydrology to corroborate likely pathways (Figure 6).
Figure 6. Route corridor options using Arcview 3.2 (L.C. Hazell).
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A major limitation in this study was the process of data acquisition.
Digitising such extensive landscapes is always a challenging undertaking.
Without access to large scale remote sensing technologies, this study relied on
the digitisation and interpretation of topographical land survey maps. Errors in
interpretation of contour lines do occur and may have influenced the gradient
analysis; however the points of shallowest gradient in the landscape
correspond to those parts of the digitised map which are easiest to interpret
