Scale the results in nominal value based on to the dataset's projection toĭisplay on the map. Var minArea = contArea.gte(pixels).selfMask() Ĥ. Var contArea = canop圜nnectedPixelCount() Use connectedPixelCount() to get contiguous area. Note that if no kernel is passed toĬonnectedPixelCount, 8 neighbor adjacency is used to determine connectivity. Apply the minimum area requirement using connectedPixelCount
var canop圜over10 = canop圜over.gte(cc).selfMask() ģ. Apply the minimum canopy cover percentage Select 'treecover2000' in the Global Forest Change dataset. Here, we use the Global ForestĬhange dataset. Including the Global Forest Change (GFC) (year 2000) and GLCF: Landsat TreeĬover Continuous Fields (2000, 2005, and 2010). Tree coverĬurrently, Google Earth Engine has several tree cover datasets in the catalogue, You can adjust this by calculating the actual minimum areas Var selected = countries.filter(ee.Filter.eq('country_na', ee.String(country))) ĭepending on the location of the country, the number of pixels that make up forĠ.5 ha would differ. Var countries = ee.FeatureCollection('USDOS/LSIB_SIMPLE/2017') Load country features from Large Scale International Boundary (LSIB) dataset. Minimum mapping area for tree loss (usually same as the minimum forest area). (the national definition may be different). This tutorial selected Bolivia as an example, with the minimum canopy cover of
Instructions Select a country and set parameters In various reporting of forest and/or land-use related data, countries may haveĭifferent forest definitions, including these parameters, forest types or land It does not include land that is predominantly underĪgricultural or urban land use" (FAO 2015). The Food and Agriculture Organization of the United Nations (FAO) definesįorests as "Land spanning more than 0.5 hectares with trees higher than 5 metersĪnd a canopy cover of more than 10 percent, or trees able to reach these
#BUILDSOFT GLOBAL ESTIMATING TUTORIAL HOW TO#
Will learn how to extract forest area by applying technical thresholds of canopyĬover and minimum area requirements. When estimating forest cover, deforestation, or emissions from land-use changeĪt the national level, countries use forest definitions.
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