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GFW How to portal How to

1. Enter the GFW Interactive Map.

2. Turn on the Forest Change data layer you wish to analyze (e.g., tree cover loss).

3. Define the time period of your analysis by dragging the handles of the timeline or by selecting a time interval.

4. Select the Analyze and Subscribe icon on the right-hand side of the map, and choose “Draw or Upload Shape.”

  1. To analyze a user-drawn shape, select “Start drawing” and click with your mouse to draw a shape in the map. Note: You can drag the points to edit your shape after you’re finished drawing.

    • The analysis results will appear in the window on the right side of the map.
    • If you want to adjust the time period you are analyzing, simply drag the handles on the timeline or select a different time interval.
    • If you want to change the type of data, you can also choose a different data set under the Forest Change menu on the map. Your results will update immediately based on your selection.
    • You can then subscribe to the activated forest change data set for the area by clicking the “Subscribe” button, download the data for your area of interest directly from the map (not available for all Forest Change data), or discard your analysis.
  2. To analyze uploaded data, click the button that says “Click to Pick a File or Drop One Here” to select a data set from your computer to upload. You can also drag a data set directly from your computer’s file explorer or finder. Note: Data can be uploaded in the following formats: Unzipped: .bna, .csv, .dxf, .gtx, .txt, json, .geojson, .rss, .georss, .xml, .gml, .gmt, . gpx, .itf, .kml, .kmz. Zipped: .shp, dbf, .shx, .gml, .xsd, .itf, .ili, .tab, .map, .id, .dat, .vrt. Point features are not supported and the maximum recommended file size is 1 MB. Note: You can drag the points to edit your shape once it’s uploaded to the map.

    • Your shape(s) will then show up on the map and the analysis results will appear in the right-hand window. Note: If you upload more than one shape at a time, the analysis tool will sum up the area of your shapes in the forest change calculation.

    • If you want to adjust the time period you are analyzing, simply drag the handles on the timeline or select a different time interval.
    • If you want to change the type of data, you can also choose a different data set under the Forest Change menu on the map. Your results will update immediately based on your selection.

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