Kriging Toolkit for Python.

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PyKrige

PyKrige-LOGO

Kriging Toolkit for Python.

Purpose

The code supports 2D and 3D ordinary and universal kriging. Standard variogram models (linear, power, spherical, gaussian, exponential) are built in, but custom variogram models can also be used. The 2D universal kriging code currently supports regional-linear, point-logarithmic, and external drift terms, while the 3D universal kriging code supports a regional-linear drift term in all three spatial dimensions. Both universal kriging classes also support generic 'specified' and 'functional' drift capabilities. With the 'specified' drift capability, the user may manually specify the values of the drift(s) at each data point and all grid points. With the 'functional' drift capability, the user may provide callable function(s) of the spatial coordinates that define the drift(s). The package includes a module that contains functions that should be useful in working with ASCII grid files (\*.asc).

See the documentation at http://pykrige.readthedocs.io/ for more details and examples.

Installation

PyKrige requires Python 3.5+ as well as numpy, scipy. It can be installed from PyPi with,

pip install pykrige

scikit-learn is an optional dependency needed for parameter tuning and regression kriging. matplotlib is an optional dependency needed for plotting.

If you use conda, PyKrige can be installed from the conda-forge channel with,

conda install -c conda-forge pykrige

Features

Kriging algorithms

OrdinaryKriging: 2D ordinary kriging with estimated mean
UniversalKriging: 2D universal kriging providing drift terms
OrdinaryKriging3D: 3D ordinary kriging
UniversalKriging3D: 3D universal kriging
RegressionKriging: An implementation of Regression-Kriging
ClassificationKriging: An implementation of Simplicial Indicator Kriging

Wrappers

rk.Krige: A scikit-learn wrapper class for Ordinary and Universal Kriging

Tools

kriging_tools.write_asc_grid: Writes gridded data to ASCII grid file (\*.asc)
kriging_tools.read_asc_grid: Reads ASCII grid file (\*.asc)
kriging_tools.write_zmap_grid: Writes gridded data to zmap file (\*.zmap)
kriging_tools.read_zmap_grid: Reads zmap file (\*.zmap)

Kriging Parameters Tuning

A scikit-learn compatible API for parameter tuning by cross-validation is exposed in sklearn.model_selection.GridSearchCV. See the Krige CV example for a more practical illustration.

Regression Kriging

Regression kriging can be performed with pykrige.rk.RegressionKriging. This class takes as parameters a scikit-learn regression model, and details of either the OrdinaryKriging or the UniversalKriging class, and performs a correction step on the ML regression prediction.

A demonstration of the regression kriging is provided in the corresponding example.

Classification Kriging

Simplifical Indicator kriging can be performed with pykrige.ck.ClassificationKriging. This class takes as parameters a scikit-learn classification model, and details of either the OrdinaryKriging or the UniversalKriging class, and performs a correction step on the ML classification prediction.

A demonstration of the classification kriging is provided in the corresponding example.

License

PyKrige uses the BSD 3-Clause License.

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This version

1.7.2

May 27, 2024

1.7.1

Oct 16, 2023

1.7.0

Aug 18, 2022

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Sep 2, 2021

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Aug 20, 2020

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Jan 26, 2015

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Oct 27, 2014

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PyKrige 1.7.2

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PyKrige

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Kriging algorithms

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Kriging Parameters Tuning

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