The satellite data used are Landsat MSS (~1980) and Landsat TM (~1990 and~2000).
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Note on temporal coverage: Comparison of size distributions of clear cut areas made in 2 different time periods, covering a total area of about 10 000 km2 with 77% forested land. The rate of cutting was about 1% of the forest area each year over this period. Approximate periods for comparison are: 1980-1990 and 1990-2000.