When the first state-wide mapping of woody vegetation change using SPOT satellite imagery was completed, the rates of vegetation change were much lower than existing Landsat measurements. This research aimed to understand why the measurements from SPOT and Landsat imagery were different by comparing woody vegetation change mapping for similar areas using the two different sensors. The difference was related to the resolution of the imagery used in combination with the degree of heterogeneity of vegetation being mapped. SPOT imagery mapped more occurrences of vegetation change than Landsat; however, the overall change area was less than that measured with Landsat. Although Landsat missed some change areas mapped by SPOT, it usually overestimated the area of change compared to the SPOT-derived product.
A Comparison of Woody Change Mapping based on SPOT 5 and Landsat TM Imagery using 2010–2011 Imagery
This study aims to understand systematic differences in woody vegetation change reported by SPOT and Landsat caused by differences in the resolution of imagery used, not differences caused by factors such as variation in image acquisition dates.
- 1 July 2014
- Office of Environment and Heritage
- ISBN 978-1-74359-722-4
- ID OEH20140569
- File PDF 1.1MB
- Pages 24
- Name woody-change-mapping-comparison-140569.pdf