Posts Tagged ‘ SSURGO ’

Soil Series Query for SoilWeb

September 16, 2011
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Soil Series Query for SoilWeb

A map depicting the spatial distribution of a given soil series can be very useful when working on a new soil survey, updating an old one, or searching for specific soil characteristics. We have recently added a soil series query facility to SoilWeb, w...

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A Visualization of Soil Taxonomy Down to the Subgroup Level

September 29, 2010
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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 ...

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Soil Properties Visualized on a 1km Grid

August 31, 2010
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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...

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Updated SoilWeb for the iPhone + Alpha Android Version

June 15, 2010
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Major updates to the SoilWeb iPhone Application. read more

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Getting Parent Material Data out of SSURGO

May 27, 2010
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  Parent material data is stored within the copm and copmgrp tables. The copm table can be linked to the copmgrp table via the 'copmgrpkey' field, and the copmgrp table can be linked to the component table via the 'cokey' field. The following queries illustrate these table relationships, and show one possible strategy for extracting the parent material information...

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Two New Soils-Related KMZ Demos

February 10, 2010
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Two New Soils-Related KMZ Demos

LCC KMZ Soil Texture KMZ   Forgot to post these KMZ files: 1-km scale, aggregate LCC and soil texture data, derived from SSURGO. These are part of a series of KMZ / raster...

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New R-Forge Site for Quantitative Pedology

November 8, 2009
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New R-Forge Site for Quantitative Pedology

Just back from the annual meetings, and it looks like there is a significant interest in collaborative R coding of soils-related algorithms and visualization. A new R-forge site has been created to host Algorithms for Quantitative Pedology. Public release of the 'soil' package should be ready in a couple weeks. Soil Profile Dendrogram

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Aggregating SSURGO Data in R

September 10, 2009
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Aggregating SSURGO Data in R

  Premise SSURGO is a digital, high-resolution (1:24,000), soil survey database produced by the USDA-NRCS. It is one of the largest and most complete spatial databases in the world; and is available for nearly the entire USA at no cost. These data are distributed as a combination of geographic and text data, representing soil map units and their...

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Potential Loss of Arable Land in the Central San Joaquin Valley, CA

August 17, 2009
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Potential Loss of Arable Land in the Central San Joaquin Valley, CA

Rapid urban and sub-urban expansion in the San Joaquin Valley have resulted in the loss of millions of acres of prime farmland in the last 100 years. Approximately 11% of class 1 (irrigated) land and 7% of class 2 land have already been paved over in the Fresno-Madera region (first image below). Recent projections in the expansion of urban...

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