Posts Tagged ‘ Visualization of Soil Properties ’

AQP Kick-Start

March 27, 2012
By

A fun kick-starter for anyone interested in working with soil profile data in R, via AQP. See in-line comments for details. Up next, profile slicing and aggregation. read more

Read more »

Dissimilarity Between Soil Profiles: A Closer Look

March 23, 2012
By
Dissimilarity Between Soil Profiles: A Closer Look

Continuing the previous discussion of pair-wise dissimilarity between soil profiles, the following demonstration (code, comments, and figures) further elaborates on the method. A more in-depth discussion of this example will be included as a vignette w...

Read more »

AQP 0.9-9 is ready: 1.0 should be out by 2012-01-01 !

December 22, 2011
By
AQP 0.9-9 is ready: 1.0 should be out by 2012-01-01 !

Version 1.0 of AQP is nearly ready-- after nearly 3 years of development, 2 years on R-Forge, and 1+ year on CRAN. Just pushed version 0.9-9 to R-Forge, and it should be on CRAN within a couple days. Recent changes are listed below, clipped from the NE...

Read more »

Experimental S4 Classes and Methods added to AQP (Algorithms for Quantitative Pedology) Package

February 23, 2011
By
Experimental S4 Classes and Methods added to AQP (Algorithms for Quantitative Pedology) Package

Thanks to some help from Pierre Roudier, the aqp package now has some new S4-style classes and methods-- custom tailored to the complexities of soil profile data. These new classes/methods are only available in the aqp development branch, found on our ...

Read more »

Updates to the ‘aqp’ Package for R (version 0.98-3)

November 30, 2010
By

Just released an updated version of our 'aqp' package for quantitative soils investigations, available on CRAN and R-Forge. Some of the major changes are listed below: from the aqp NEWS file: -------------------------- aqp 0.98-1 (2010-11-23) --------...

Read more »

A Visualization of Soil Taxonomy Down to the Subgroup Level

September 29, 2010
By
A Visualization of Soil Taxonomy Down to the Subgroup Level

It turns out that you can generate a quasi-numerical distance between soil profiles classified according to Soil Taxonomy (or any other hierarchical system) using Gower's generalized dissimilarity metric. For example, taxonomic distances computed from ...

Read more »

AQP Examples: Profile Visualization

September 20, 2010
By

Two examples of the output from the profile_plot() function, using data from the Sierra Foothill Region, CA. read more

Read more »

Soil Properties Visualized on a 1km Grid

August 31, 2010
By
Soil Properties Visualized on a 1km Grid

Fresno Area Urban Areas vs Irrigated LCC: grey regions are current urban areas A couple of maps generated from a 1km gridded soil property database, derived from SSURGO data where available with holes filled with STATSGO data. Soil properties visualize...

Read more »

New R Package ‘aqp’: Algorithms for Quantitative Pedology [updates]

August 9, 2010
By
New R Package ‘aqp’: Algorithms for Quantitative Pedology [updates]

  Soils are routinely sampled and characterized according to genetic horizons (layers), resulting in data that are associated with principal dimensions: location (x,y), depth (z), and property space (p). The high dimensionality and grouped nature...

Read more »

Interesting use of levelplot() for time series data

January 16, 2010
By
Interesting use of levelplot() for time series data

levelplot example: soil temperature (left) and moisture (right) Several recent articles appeared on the R-bloggers feed aggregator that demonstrated an interesting visualization of time series data using color. This style of visualization was readily adapted for the time...

Read more »