New Zealand Journal of Forestry (1995) 40(2): 23–26
©New Zealand Institute of Forestry
Using a Geographical Information System to map and determine the extent of soil disturbance resulting from a logging operation
R. K. Brownlie and C. J. Terlesk
The logging extraction tracks and landings of a recently clearfelled forest compartment were mapped from aerial photographs, into a (GIS) Geographical Information System, using an analytical stereoplotter.
The GIS spatial data, combined with field measurements of track-width, were used to calculate lineal and spatial statistics of the site disturbance and to generate a digital terrain model of the compartment. The model was used to determine the distribution of extraction tracks in various slope classes and to provide a visual representation of their layout.
In this application GIS was used to map site disturbance 'after the event'. The advantages of using GIS-derived information in the harvest planning phase, to improve efficiency and to minimise disturbance during logging operations, are discussed.
Keywords: Analytical stereoplotter, Geographical Information System (GIS), mapping, soil disturbance, harvesting.