PDF Estimation of Fire Emissions in Portugal
[Pages:23]Estimation of Land-use Changes in Portugal
Methodology used in NIR 2013
JRC Workshop, 27-29 February 2013
Land-use Changes in Portugal: General Approach ? 3 separate approaches for Portugal (9,22Mha)
? Portuguese Mainland (8,91Mha = 96,6%) ? Azores (0,23Mha = 2,5%) ? Madeira (0,08Mha = 0,9%)
Mainland
Madeira
Portuguese Mainland: General Approach
? Time-series 1995-2012 based on NFI6
? National Forest Inventory 6 covers all land uses and land-use changes (1995, 2005, 2010)
? Time-Series 1970-1995 (re)constructed using auxiliary data:
? National Forest Inventories: NFI2 (1974), NFI3(1985)
? Total forest area ? Forest area per forest type
? General Census of Agriculture (1979, 1989, 1999, 2009)
? Total cropland and grassland area ? Crop area per crop type
NFI6 Methodology
? Land-use/cover data
? Use of Sample Points
? Systematic grid of 500m x 500m (360'000 points) ? Land-use X attributed to a point if included in an area of X >0,5ha
? Interpretation of airborn imagery
? Full wall-to-wall country coverage ? False color near infrared imagery (1995, 2005, 2010) and true color imagery
(2005, 2010) ? Spatial resolution 1m (1995) and 0.5m (2005, 2010)
? Use of Kyoto and UNFCCC compatible land-use classification
? ALL land uses (not just forest)
? Land-use Change data
? Comparison of land-use in each point in each temporal assessment
? Two land-use change matrices : 1995-2005 and 2005-2010 ? Annual data for land-use change estimated by dividing total land-use change by
number of years in interval
Data production process
National Sampling Grid
Orthophotomaps 1995 Orthophotomaps 2005 Orthophotomaps 2010
Classified sampling points 1995 Classified sampling points 2005 Classified sampling points 2010
Auxiliary data
Final classification
NFI6 ? Attribution of Land-use/cover
? A > 0.5ha
? Results calculated based on No. of plots per land use type
75ha B 25ha A
? A < 0.5ha or ................
................
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