GIS coverages produced for the paper "A soil colour map of China" by Liu F, Rossiter D G,  Zhang G-L, Li D C
Geoderma (under review)

Data DOI£º10.11666/00072.ver1.db

Files:
1. singles.zip (319.4 Mb):
-- all-China 1km resolution R, G, B separates as GeoTIFF rasters, as predicted with no stretching (0-255)
-- packed as single ZIP file
-- produced by the random forest model applied over the all-China grid
-- file names when expanded: {wet|dry}{r|g|b}{depth}.{tif,tfw,tif.aux.xml,tif.vat.dbf}

2. composites.zip (463.7 Mb)
-- all-China colour composites created from R, G, B predictions as GeoTIFF rasters, no stretching (0-255), with colour maps
-- built in ArcGIS
-- packed as single ZIP file
-- file names when expanded: {dry,wet}rgb{depth}.{tif,tfw,tif.aux.xml,tif.ovr}

3. ColourMatchingBar{Moist,Dry}.pdf
-- colour bars for monitor or print calibration

4. ProducingColourBars.R
-- a small R script to produce your own colour bars

File extensions:
-- .tif : the grid itself; this includes a header with the coordinate reference system
These other files are not necessary to use or view the .tif, but help ArcGIS
-- .tfw - the "world" file, locating the image and its characteristics, i.e., the pixel size, coordinate of upper-left pixel
             and rotation values (none in this case) (allowing the image to be correctly placed on a coordinate plane);
-- .tif.ovr - a reduced-resolution versions of the .tif
-- .tif.vat.dbf - a table for the legend values
-- .tif.aux - auxiliary data such as pre-computed histograms

Coordinate Reference System: 
+proj=aea +lat_1=25 +lat_2=47 +lat_0=0 +lon_0=105 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs