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User Request – Shepards Classification of Sediments

I received a request overnight on how to render the Shepard’s classification diagram, which is an

New Geometry – Ternary Errorbars

ggtern has introduced a new series of geometries to represent known errors in data, they

USDA Textural Soil Classification

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Included in the next version ( of ggtern, will be a new data set, taken from