Foliage projective cover 2010 - Fraser Island

Foliage Projective Cover (FPC) is the percentage of ground area occupied by the vertical projection of foliage. The Remote Sensing Centre FPC mapping is based on an automated decision tree classification technique applied to dry season (May to October) Landsat 5 TM imagery for the period 1986-2010. The product has a nominal accuracy of 85%. The field data used to calibrate the imagery/FPC relationship was mostly collected over the period 1996-1999. Additional corrections were also applied to the final product to remove errors due to topographic effects, cloud, cloud shadow, water, cropping, regrowth and wooded vegetation clearing. Some errors may remain. This product has more precise FPC predictions than previous versions. The analysis has been completed on each of 90 satellite scenes. While some land cover change may be detected in the FPC processing, this product is not designed to generate clearing layers, and cannot be used to assess clearing or be compared with previous years for change monitoring. The Statewide Landcover and Trees Study (SLATS) produces accurate clearing layers for this purpose. Description: FPC is the percentage of ground area occupied by the vertical projection of foliage. FPC Image (lztmre_fras_e8810_chtm6.img). Image value = FPC 100 (i.e. FPC of 5% = image value of 105). The pixel values in this data set represent the predicted Foliage Projective Cover (FPC) values. Range is 100-200 which is equivalent to 0-100% FPC. Values erroneously predicted above 100% or below 0% have been classed as 200 and 100 respectively. Zero values indicate null data. A number of datasets have been used to mask out certain features from the FPC dataset: - Cropping and plantation areas have been masked using the 1999 Queensland Land Use Mapping Program (QLUMP) dataset (https://www.qld.gov.au/environment/land/vegetation/mapping/qlump/). - A Landsat-derived water index was used to mask water bodies from each individual FPC image (Danaher and Collett 2006). An additional mask is applied for areas with persistent inundation based on multi-temporal analysis of the water index. - A topographic correction based on the 1 second SRTM derived Digital Surface Model, Version 1.0, was applied to misclassified steep east-facing slopes. The SRTM data consisted of a DEM and slope layer as processed by Geosciences Australia.