soilDB (version 2.7.1)

fetchKSSL: Get Kellogg Soil Survey Laboratory Data from SoilWeb snapshot

Description

Download soil characterization and morphologic data via BBOX, MLRA, or soil series name query, from the KSSL database.

Usage

fetchKSSL(
  series = NA,
  bbox = NA,
  mlra = NA,
  pedlabsampnum = NA,
  pedon_id = NA,
  pedon_key = NA,
  returnMorphologicData = FALSE,
  returnGeochemicalData = FALSE,
  simplifyColors = FALSE,
  progress = TRUE
)

Arguments

series

vector of soil series names, case insensitive

bbox

a single bounding box in WGS84 geographic coordinates e.g. c(-120, 37, -122, 38)

mlra

vector of MLRA IDs, e.g. "18" or "22A"

pedlabsampnum

vector of KSSL pedon lab sample number

pedon_id

vector of user pedon ID

pedon_key

vector of KSSL internal pedon ID

returnMorphologicData

logical, optionally request basic morphologic data, see details section

returnGeochemicalData

logical, optionally request geochemical, optical and XRD/thermal data, see details section

simplifyColors

logical, simplify colors (from morphologic data) and join with horizon data

progress

logical, optionally give progress when iterating over multiple requests

Value

a SoilProfileCollection object when returnMorphologicData is FALSE, otherwise a list.

Details

This is an experimental interface to a subset for the most commonly used data from a snapshot of KSSL (lab characterization) and NASIS (morphologic) data.

Series-queries are case insensitive. Series name is based on the "correlated as" field (from KSSL snapshot) when present. The "sampled as" classification was promoted to "correlated as" if the "correlated as" classification was missing.

When returnMorphologicData is TRUE, the resulting object is a list. The standard output from fetchKSSL (SoilProfileCollection object) is stored in the named element "SPC". The additional elements are basic morphologic data: soil color, rock fragment volume, pores, structure, and redoximorphic features. There is a 1:many relationship between the horizon data in "SPC" and the additional dataframes in morph. See examples for ideas on how to "flatten" these tables.

When returnGeochemicalData is TRUE, the resulting object is a list. The standard output from fetchKSSL (SoilProfileCollection object) is stored in the named element "SPC". The additional elements are geochemical and mineralogy analysis tables, specifically: geochemical/elemental analyses "geochem", optical mineralogy "optical", and X-ray diffraction / thermal "xrd_thermal". returnGeochemicalData will include additional dataframes geochem, optical, and xrd_thermal in list result.

Setting simplifyColors=TRUE will automatically flatten the soil color data and join to horizon level attributes.

Function arguments (series, mlra, etc.) are fully vectorized except for bbox.

References

http://ncsslabdatamart.sc.egov.usda.gov/

See Also

fetchOSD

Examples

# NOT RUN {
# }
# NOT RUN {
if(requireNamespace("curl") &
    curl::has_internet()) {
    
    library(aqp)
    
    # search by series name
    s <- fetchKSSL(series='auburn')
    
    # search by bounding-box
    # s <- fetchKSSL(bbox=c(-120, 37, -122, 38))
    
    # how many pedons
    length(s)
    
    # plot 
    plotSPC(s, name='hzn_desgn', max.depth=150)
    
    ##
    ## morphologic data
    ##
    
    # get lab and morphologic data
    s <- fetchKSSL(series='auburn', returnMorphologicData = TRUE)
    
    # extract SPC
    pedons <- s$SPC
    
    ## automatically simplify color data
    s <- fetchKSSL(series='auburn', returnMorphologicData = TRUE, simplifyColors=TRUE)
    
    # check
    par(mar=c(0,0,0,0))
    plot(pedons, color='moist_soil_color', print.id=FALSE)
    
}
# }
# NOT RUN {
# }