Mapping Land Use In A Large Agricultural Basin:
A Comparison Between Classification Techniques
Author(s)
D. Ierodiaconou, M. Leblanc, L. Laurenson, F. Stagnitti
& V. Versace
Abstract
In order to facilitate the better management of river basin resources, the
Glenelg-Hopkins region in south-east Australia required an accurate and up to
date land use map. Land use has a major impact on Australia’s natural resources
including its soil, water, flora and fauna and plays a major role in determining
basin health. Inappropriate land use and practices have contributed to extensive
dryland salinity and water quality problems. Land use data is often required for
environmental models and in most cases the reliability of model outputs is
dependent on the spatial detail and accuracy of the land use mapping. This paper
examines methods to obtain an up to date land use map and a detailed accuracy
assessment using Landsat ETM+ data for a regional basin. A multi-source based
approach allowed the collection of 4817 ground truth data points from the field
investigation. This enabled researchers to (i) incorporate a full range of
information into digital image analysis with significant improvements in
accuracy and (ii) hold sufficient independent references for an accurate error
assessment. Classification accuracy was significantly improved using a
stratification design, in which the region is sub-divided into smaller homogenous
areas as opposed to a full scene classification technique. The overall
classification accuracy was 84% (KHAT= 0.833) for the stratified approach
compared to 76% (KHAT= 0.743) for the full scene classification. Effective
assessment, planning and management of basins are dependent on a sound
knowledge of the distribution and variability of land use.
Keywords: image classification, stratification, land use, remote sensing.
Keywords
image classification, stratification, land use, remote sensing.
Related Book
Other papers in this volume
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