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potentiomap: Build Potentiometric Surfaces and Hydraulic-Gradient Arrows

Prepares groundwater-level observations from measured hydraulic head or from depth-to-water and land-surface elevation, interpolates potentiometric surfaces using thin-plate splines, inverse-distance weighting, ordinary Kriging, universal Kriging, or user-supplied methods, and creates raster, contour, diagnostic, support, and hydraulic-gradient products for review and export. Functions retain method conditions and fit diagnostics, validate explicit prediction tasks, inspect model-conditional uncertainty and monitoring-network sensitivity, identify limited prediction support, and check whether scaled hydraulic-gradient arrows remain within finite raster support and end at lower modeled head. Raster processing uses methods from 'terra' (Hijmans 2025) <doi:10.32614/CRAN.package.terra>, thin-plate splines use methods from 'fields' (Nychka et al. 2021) <doi:10.5065/D6W957CT>, and geostatistical interpolation uses methods from 'gstat' (Pebesma 2004) <doi:10.1016/j.cageo.2004.03.012>.

Version: 0.2.0
Depends: R (≥ 4.1)
Imports: fields, grDevices, graphics, gstat, sf, stats, terra, xml2
Suggests: knitr, rmarkdown, testthat (≥ 3.0.0), withr
Published: 2026-07-18
DOI: 10.32614/CRAN.package.potentiomap
Author: Elvin Cordero ORCID iD [aut, cre]
Maintainer: Elvin Cordero <elvin.cordero at seamountgeo.com>
BugReports: https://github.com/el-cordero/potentiomap/issues
License: GPL-3
URL: https://el-cordero.github.io/potentiomap/, https://github.com/el-cordero/potentiomap
NeedsCompilation: no
Language: en-US
Materials: README, NEWS
CRAN checks: potentiomap results

Documentation:

Reference manual: potentiomap.html , potentiomap.pdf
Vignettes: Contours and hydraulic-gradient arrows (source, R code)
Interpolation diagnostics and prediction support (source, R code)
Getting started with potentiomap (source, R code)
Exporting GIS products and technical reports (source, R code)
Monitoring-network sensitivity and candidate locations (source, R code)
Preparing and checking groundwater observations (source, R code)
Surface profiles, depth to water, and cross-sections (source, R code)
Temporal head change and vertical hydraulic gradients (source, R code)
Prediction support, surface uncertainty, and contour uncertainty (source, R code)
Units, vertical references, and grouped groundwater observations (source, R code)
Validating and comparing interpolation methods (source, R code)
Variograms, anisotropy, and external drift (source, R code)

Downloads:

Package source: potentiomap_0.2.0.tar.gz
Windows binaries: r-devel: potentiomap_0.2.0.zip, r-release: potentiomap_0.2.0.zip, r-oldrel: potentiomap_0.2.0.zip
macOS binaries: r-release (arm64): potentiomap_0.2.0.tgz, r-oldrel (arm64): potentiomap_0.2.0.tgz, r-release (x86_64): potentiomap_0.2.0.tgz, r-oldrel (x86_64): potentiomap_0.2.0.tgz
Old sources: potentiomap archive

Linking:

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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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