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aqp (version 2.0.1)

Algorithms for Quantitative Pedology

Description

The Algorithms for Quantitative Pedology (AQP) project was started in 2009 to organize a loosely-related set of concepts and source code on the topic of soil profile visualization, aggregation, and classification into this package (aqp). Over the past 8 years, the project has grown into a suite of related R packages that enhance and simplify the quantitative analysis of soil profile data. Central to the AQP project is a new vocabulary of specialized functions and data structures that can accommodate the inherent complexity of soil profile information; freeing the scientist to focus on ideas rather than boilerplate data processing tasks . These functions and data structures have been extensively tested and documented, applied to projects involving hundreds of thousands of soil profiles, and deeply integrated into widely used tools such as SoilWeb . Components of the AQP project (aqp, soilDB, sharpshootR, soilReports packages) serve an important role in routine data analysis within the USDA-NRCS Soil Science Division. The AQP suite of R packages offer a convenient platform for bridging the gap between pedometric theory and practice.

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install.packages('aqp')

Monthly Downloads

2,080

Version

2.0.1

License

GPL (>= 3)

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Maintainer

Dylan Beaudette

Last Published

September 6th, 2023

Functions in aqp (2.0.1)

NCSP

Numerical Classification of Soil Profiles
prj,SoilProfileCollection-method

Get or Set Coordinate Reference System for SoilProfileCollection
SANN_1D

Fix Overlap within a Sequence via Simulated Annealing
HzDepthLogicSubset

Subset SoilProfileCollection Objects or Horizons via checkHzDepthLogic
L1_profiles

Create Representative Soil Profiles via L1 Estimator
SoilProfileCollection

An S4 object representation of a group of soil profiles.
SPC.with.overlap

Example SoilProfileCollection with Overlapping Horizons
GHL

Get or Set Generalized Horizon Label (GHL) Column Name
ROSETTA.centroids

Average Hydraulic Parameters from the ROSETTA Model by USDA Soil Texture Class
plotSPC

Create Soil Profile Sketches
addDiagnosticBracket

Annotate Diagnostic Features
SoilTextureLevels

Ranking Systems for USDA Soil Texture Classes
aggregateSoilDepth

Probabalistic Estimation of Soil Depth within Groups
alignTransect

Calculate Relative Positions from Transect Data
addVolumeFraction

Symbolize Volume Fraction on a Soil Profile Collection Plot
aggregateColor

Summarize Soil Colors
addBracket

Add Depth Brackets
accumulateDepths

Accumulate horizon depths, and reflect reversed depths, relative to new datum
allocate

Allocate soil properties within various classification systems.
aqp-package

Algorithms for Quantitative Pedology
buntley.westin.index

Buntley-Westin (1965) Index
argillic.clay.increase.depth

Return upper boundary of argillic horizon
bootstrapSoilTexture

Bootstrap Soil Texture Data
aqp_df_class,SoilProfileCollection-method

Get aqp_df_class entry from metadata or return a safe value.
checkSPC

Test for a valid SoilProfileCollection
brierScore

Multinominal Brier Score
barron.torrent.redness.LAB

Barron & Torrent (1986) Redness Index in LAB color space
checkHzDepthLogic

Check a SoilProfileCollection object for errors in horizon depths.
ca630

Soil Data from the Central Sierra Nevada Region of California
c,SoilProfileCollection-method

Combine SoilProfileCollection objects
as

Coerce SoilProfileCollection with as()
compareSites

Compare Site Level Attributes of a SoilProfileCollection
colorQuantiles

Soil Color Range via Quantiles
confusionIndex

Confusion Index
colorContrastPlot

Color Contrast Plot
compositeSPC

Return a list representation of site and horizon level data
contrastClass

Soil Color Contrast
contrastChart

Color Contrast Chart
depths

Initialize a SoilProfileCollection from data.frame
diagnostic_hz<-

Add Data to Diagnostic Features Slot
colorContrast

Metrics of Contrast Suitable for Comparing Soil Colors
colorChart

Visualize soil colors in Munsell notation according to within-group frequency.
denormalize

Create a (redundant) horizon-level attribute from a site-level attribute
dice,SoilProfileCollection-method

Efficient Slicing of SoilProfileCollection Objects
depthOf

Get top or bottom depths of horizons matching a regular expression pattern
diagnostic_hz,SoilProfileCollection-method

Retrieve diagnostic data from SoilProfileCollection
correctAWC

Apply rock fragment or salt correction to available water content
crit.clay.argillic

Determines threshold (minimum) clay content for argillic upper bound
depth_units,SoilProfileCollection-method

Get depth units from metadata
$

Get data from column of horizon or site data in a SoilProfileCollection
[[<-

Add or change column of horizon or site data in a SoilProfileCollection
depthWeights

Return a vector of contributing fractions over a depth interval
$<-

Set data in column of horizon or site data in a SoilProfileCollection
[[

Get column of horizon or site data in a SoilProfileCollection
duplicate

Duplicate Profiles of a SoilProfileCollection
estimateAWC

Estimate available water capacity for fine-earth fraction
dissolve_hz

Dissolving horizon boundaries by grouping variables
electroStatics_1D

Label placement based on a simulation of electrostatic forces
equivalentMunsellChips

Identify "equivalent" (whole number value/chroma) Munsell chips
equivalent_munsell

Indices of "equivalent" Munsell chips in the munsell data set
fillHzGaps

Find and Fill Horizon Gaps
estimatePSCS

Estimate boundaries of the particle size control section (U.S Soil Taxonomy; 12th edition)
explainPlotSPC

Visual Explanation for plotSPC
fixOverlap

Fix Overlap within a Sequence
evalMissingData

Evaluate Missing Data
evalGenHZ

Evaluate Generalized Horizon Labels
get.increase.matrix

Compute Pair-wise Distances of Soil Properties over Depth
flagOverlappingHz

Flag perfectly overlapping horizons within a SoilProfileCollection
fragmentClasses

Coarse Fragment Class Labels and Diameter
generalize.hz

Generalize Horizon Names
estimateSoilDepth

Estimate Soil Depth
fragmentSieve

Sieve the Coarse Fraction of Soil
genSlabLabels

Generate Labels for Slabs
estimateSoilColor

Estimate dry soil colors from moist soil colors and vice versa.
getArgillicBounds

Estimate upper and lower boundary of argillic diagnostic subsurface horizon
get.ml.hz

Determine ML Horizon Boundaries
getCambicBounds

Find all intervals that are potentially part of a Cambic horizon
getClosestMunsellChip

Get Approximate Munsell Chip
getLastHorizonID

Get IDs of Deepest Horizons by Profile
getSoilDepthClass

Generate Soil Depth Class Matrix
harden.rubification

Harden (1982) Rubification
harden.melanization

Harden (1982) Melanization
grepSPC

Subset SPC with pattern-matching for text-based attributes
glomApply

Subset an SPC by applying glom to each profile
glom,SoilProfileCollection-method

Subset soil horizon data using a depth or depth interval
getSurfaceHorizonDepth

Determine thickness of horizons (continuous from surface) matching a pattern
groupSPC

Store groupings within a profile collection.
groupedProfilePlot

Grouped Soil Profile Plot
horizons,SoilProfileCollection-method

Retrieve horizon data from SoilProfileCollection
horizonNames<-

Set horizon column names
horizonColorIndices

Horizon Color Indices
horizonDepths<-

Set horizon depth column names
hzID<-,SoilProfileCollection-method

Set horizon IDs
hzDepthTests

Tests of horizon depth logic
hzDesgn,SoilProfileCollection-method

Get horizon designation column name
hzDistinctnessCodeToOffset

Convert Horizon Boundary Distinctness to Vertical Offset
hzMetadata,SoilProfileCollection-method

Get horizon-level metadata
hurst.redness

Hurst (1977) Redness Index
guessHzAttrName

Guess Horizon Slot Column Names
hzTopographyCodeToOffset

Convert Horizon Boundary Topography to Vertical Offset
hasDarkColors

Find horizons with colors darker than a Munsell hue, value, chroma threshold
huePosition

Munsell Hue Reference and Position Searching
metadata,SoilProfileCollection-method

Retrieve metadata from SoilProfileCollection
idname,SoilProfileCollection-method

Get profile ID column name
hzTopographyCodeToLineType

Convert Horizon Boundary Topography to Line Type
hzAbove

Horizons Above or Below
harmonize,SoilProfileCollection-method

Harmonize a property by profile-level denormalization for convenient visualization or analysis of ranges
huePositionCircle

Visual Description of Munsell Hue Ordering
genhzTableToAdjMat

Convert cross-tabulation to adjacency matrix.
max,SoilProfileCollection-method

Get the maximum bottom depth in a SoilProfileCollection
initSpatial<-

Initialize Spatial Data in a SoilProfileCollection
hztexclname

Get or Set Horizon Texture Class Column Name
hzdesgnname

Get or Set Horizon Designation Column Name
min,SoilProfileCollection-method

Get the minimum bottom depth in a SoilProfileCollection
missingDataGrid

Missing Data Grid
guessGenHzLevels

Guess Appropriate Ordering for Generalized Horizon Labels
invertLabelColor

Make High Contrast Label Colors
hzidname<-

Set horizon ID column name
lunique

Eliminate duplicate instances of profile IDs in a list of SoilProfileCollections
length,SoilProfileCollection-method

Get the number of profiles in a SoilProfileCollection
munsell

Munsell to sRGB Lookup Table for Common Soil Colors
mixMunsell

Mix Munsell Colors via Spectral Library
isEmpty,SoilProfileCollection-method

Check for "empty" profiles in a SoilProfileCollection
jacobs2000

Soil Morphologic Data from Jacobs et al. 2002.
munsell.spectra

Spectral Library of Munsell Colors
mutate_profile

Transform a SPC (by profile) with a set of expressions
pbindlist

Combine a list of SoilProfileCollection objects
munsellHuePosition

Munsell Hue Position Reference
perturb

Perturb soil horizon depths using boundary distinctness
names,SoilProfileCollection-method

Get names of columns in site and horizons table
mollic.thickness.requirement

Calculate the minimum thickness requirement for Mollic epipedon
nrow,SoilProfileCollection-method

Get the number of horizons in a SoilProfileCollection
plotColorQuantiles

Visualize Color Quantiles
plotColorMixture

Visualize Spectral Mixing of Munsell Colors
findOverlap

Find Overlap within a Sequence
munsell2rgb

Convert Munsell Color Notation to other Color Space Coordinates (sRGB and CIELAB)
munsell2spc,SoilProfileCollection-method

Merge Munsell Hue, Value, Chroma converted to sRGB & CIELAB into a SoilProfileCollection
osd

Example Output from soilDB::fetchOSD()
parseMunsell

Parse Munsell Color Notation
quickSPC

Quickly Assemble a SoilProfileCollection
panel.depth_function

Lattice Panel Function for Soil Profiles
random_profile

Random Profile
plotMultipleSPC

Plot Multiple SoilProfileCollection Objects
plot_distance_graph

Between Individual Distance Plot
profileGroupLabels

Soil Profile Group Labels
profileInformationIndex

Soil Profile Information Index
reorderHorizons

Re-order corrupted horizon data
repairMissingHzDepths

Repair Problematic Lower Horizon Depths
previewColors

Preview Colors
reactionclass

pH Reaction Classes
profileApply

Iterate over profiles in a SoilProfileCollection
ph_to_rxnclass

Convert pH to/from Reaction Classes
rgb2munsell

sRGB to Munsell Color Conversion
restrictions,SoilProfileCollection-method

Retrieve restriction data from SoilProfileCollection
pc

Deprecated: Numerical Soil Profile Comparison
restrictions<-

Add Data to Restrictions Slot
replaceHorizons<-

Replace Data in Horizon Slot
profile_id<-

Set profile IDs
show

SoilProfileCollection show method
shannonEntropy

Shannon Entropy
reduceSPC

Select a subset of columns from a SoilProfileCollection
rebuildSPC

Rebuild a SoilProfileCollection object
site,SoilProfileCollection-method

Retrieve site data from SoilProfileCollection
siteNames<-

Set site column names
sierraTransect

Soil Physical and Chemical Data Related to Studies in the Sierra Nevada Mountains, CA, USA.
sim

DEPRECATED Simulate Soil Profiles
segment

Segmenting of Soil Horizon Data by Depth Interval
rowley2019

Soil Morphologic, Geochemical, and Mineralogy Data from Rowley et al. 2019.
sp2

Honcut Creek Soil Profile Data
soil_minerals

Munsell Colors of Common Soil Minerals
soilPalette

Soil Color Palette
soilColorSignature

Soil Profile Color Signatures
slab

Slab-Wise Aggregation of SoilProfileCollection Objects
slice-methods

Slicing of SoilProfileCollection Objects
slicedHSD

Tukey's HSD Over Slices
sp3

Soil Profile Data Example 3
simulateColor

Simulate Soil Colors
spc_in_sync

Quickly assess relative state of site and horizon slots
[,SoilProfileCollection-method

Matrix/data.frame-like access to profiles and horizons in a SoilProfileCollection
spec2Munsell

Convert reflectance spectra to closest Munsell chip
sp1

Soil Profile Data Example 1
soiltexture

Lookup tables for sand, silt, clay, texture class, and textural modifiers.
sp5

Sample Soil Database #5
sp4

Soil Chemical Data from Serpentinitic Soils of California
sp6

Soil Physical and Chemical Data from Manganiferous Soils
spc2mpspline,SoilProfileCollection-method

SoilProfileCollection wrapper for mpspline2::mpspline()
spectral.reference

Standard Illuminants and Observers
subset,SoilProfileCollection-method

Subset a SoilProfileCollection with logical expressions
texcl_to_ssc

Textural conversions
transform,SoilProfileCollection-method

Transform a SPC with expressions based on site or horizon level attributes
split,SoilProfileCollection-method

Split a SoilProfileCollection object into a list of SoilProfileCollection objects.
traditionalColorNames

Traditional Soil Color Names
tauW

Compute weighted naive and tau statistics for a cross-classification matrix
thompson.bell.darkness

Thompson-Bell (1996) Index
subsetProfiles

DEPRECATED use subset
summarizeSPC

Perform summaries on groups (from group_by) and create new site or horizon level attributes
subsetHz,SoilProfileCollection-method

Subset the horizons in a SoilProfileCollection using logical criteria
textureTriangleSummary

Soil Texture Low-RV-High as Defined by Quantiles
splitLogicErrors

Split a SoilProfileCollection into a list based on types of horizon logic errors
validSpatialData,SoilProfileCollection-method

Check for valid spatial reference of profiles
subApply

Subset SPC based on result of performing function on each profile
us.state.soils

US State Soils
xtableTauW

Format a LaTeX table with results
wilson2022

Example Data from Wilson et al. 2022
unroll

Unroll Genetic Horizons
unique,SoilProfileCollection-method

Uniqueness within a SoilProfileCollection via MD5 Hash