Metadata for the file SimplifiedPeatMap_100m.tif

This file is a simplified version of the map presented in Figure 1c of 
the paper:

Dargie GC, Lewis SL, Lawson IT, Mitchard ETA, Page SE, Bocko YE & Ifo, SA. 2017. 
Age, extent and carbon storage of the central Congo Basin peatland complex. 
Nature, doi:10.1038/nature21048

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This file is a 4-class versions of the peat area and probability map in 
the original paper. It is intended for display use and rough calculations: for precise
area calculations the original file Dargie_Congo_Peat_LikeliestClassAndProbability.tif 
should be used.

The class values are:
	0. No data
	1. Open water
	2. Savanna
	3. Other tropical forest (terra firme)
	4. Peat swamp forest


To create these files the two types of vegetation under which peat was found (hardwood
and palm-dominated swamp) were combined into a single Peat Swamp Forest class. 

Further, the speckle inherent in classification was reduced through the use of a 7x7 
majority filter, whereby the central pixel in a moving 7x7 window was replaced by the 
most common pixel type found in that window. 

The resolution was then reduced to 0.000888888888 degrees, circa 100 m, using a majority
method (whereby a 2 x 2 pixel grid was converted to a single value based on the most 
common pixel of those 4. In the event of a tie, the most common pixel in the surrounding
area was used). 

Another version of this file is available in which the resolution is kept at 50 m, 
which we would recommend using at a localscale. This file is recommended for use at a 
regional scale.

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Projection and file details:

The file is a geotif in a lat/long WGS-84 and a pixel size of 0.00044444444444 degrees (c. 50 m).

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You are free to use these data for any purpose provided you cite the original paper.

The file was created by Greta Dargie and Edward Mitchard
For questions about these data layers please contact Edward Mitchard 
at edward.mitchard@ed.ac.uk