Standard color palettes for soil properties and classes

Description

Standard color palettes for soil properties and classes that can be used to display global soil data.

Usage

data(soil.legends)

Format

Contains a list of color palettes (data frames with class names / break points, and cumulative probabilities) for:

ORCDRC

numeric; soil organic carbon content in permille

PHIHOX

numeric; pH index measured in water solution

PHIKCL

numeric; pH index measured in KCl solution

BLD

numeric; bulk density in kg per cubic meter

CEC

numeric; Cation Exchange Capacity

SNDPPT

numeric; weight percentage of the sand particles (0.05–2 mm)

SLTPPT

numeric; weight percentage of the silt particles (0.0002–0.05 mm)

CLYPPT

numeric; weight percentage of the clay particles (<0.0002 mm)

CRFVOL

numeric; volumetric percentage of coarse fragments (>2 mm)

TAXGWRB

factor; World Reference base groups

TAXOUSDA

factor; Keys to Soil Taxonomy suborders

Note

Breaks for continuous soil properties were determined using the quantiles function and by visually inspecting the histograms to maximize the contrast in output maps. Based on a compilation of global soil profile data (see ISRIC WoSIS).

Author(s)

Tomislav Hengl

References

• Global Soil Information Facilities (http://gsif.isric.org)

Examples

data(soil.legends)
pal <- soil.legends$ORCDRC$COLOR
names(pal) <- signif((soil.legends$ORCDRC$MAX + 
    soil.legends$ORCDRC$MIN)/2, 3)
pal
data(soil.vars)
soil.vars[soil.vars$varname=="ORCDRC",]
## make SAGA GIS palette:
makeSAGAlegend(x=as.factor(names(pal)), col_pal=pal, 
    filename="ORCDRC.txt")

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(GSIF)
GSIF version 0.5-2 (2016-06-25)
URL: http://gsif.r-forge.r-project.org/
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/GSIF/soil.legends.Rd_%03d_medium.png", width=480, height=480)
> ### Name: soil.legends
> ### Title: Standard color palettes for soil properties and classes
> ### Aliases: soil.legends soil.dom soil.vars makeSAGAlegend
> ### Keywords: datasets
> 
> ### ** Examples
> 
> data(soil.legends)
> pal <- soil.legends$ORCDRC$COLOR
> names(pal) <- signif((soil.legends$ORCDRC$MAX + 
+     soil.legends$ORCDRC$MIN)/2, 3)
> pal
      0.1       0.3       0.5       0.7      0.95       1.3       1.7      2.15 
"#000180" "#000393" "#0006A6" "#000FB7" "#0018C8" "#0025D6" "#0032E3" "#0043ED" 
      2.7       3.3         4      4.85       5.8       6.9       8.2       9.7 
"#0054F6" "#0067FA" "#0079FE" "#038DFC" "#06A0F9" "#0DB2F2" "#15C3E9" "#21D2DD" 
     11.4      13.5      15.9      18.7        22      25.8      30.2      35.4 
"#2FE0CF" "#3EEBC0" "#4FF3AF" "#62F99C" "#75FD8A" "#89FD76" "#9BF963" "#AEF450" 
     41.4      48.4      56.5        66        77        90       105       122 
"#BFEB3F" "#CFE02F" "#DCD322" "#E8C416" "#F1B30D" "#F8A106" "#FC8F03" "#FE7B00" 
      143       167       194       226       264       308       359       418 
"#FA6800" "#F65500" "#ED4400" "#E43300" "#D62500" "#C91800" "#B80F00" "#A70700" 
> data(soil.vars)
> soil.vars[soil.vars$varname=="ORCDRC",]
  varname            fullname
5  ORCDRC Soil organic carbon
                                                                                                description
5 Organic carbon content in soil estimated using the method of Walkley-Black (Org. matter = Org. C x 1.72).
                                                                        href
5 ftp://ftp-fc.sc.egov.usda.gov/NSSC/Lab_Methods_Manual/SSIR42_2004_view.pdf
     type                units minval maxval detectionLimit  spcslot  priority
5 numeric permille or g C kg-1      0   1000              1 horizons suggested
  DomainId
5       NA
> ## make SAGA GIS palette:
> makeSAGAlegend(x=as.factor(names(pal)), col_pal=pal, 
+     filename="ORCDRC.txt")
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>