{ "_id": "6af5f330535793c85332a9ec", "Package": "terradish", "Type": "Package", "Title": "Fast Gradient-Based Optimization of Resistance Surfaces", "Version": "1.1.0", "Date": "2026-10-28", "Language": "en-US", "Authors@R": "c(\nperson(\ngiven = \"Bill\",\nfamily = \"Peterman\",\nrole = c(\"aut\", \"cre\"),\nemail = \"peterman.73@osu.edu\",\ncomment = c(ORCID = \"0000-0001-5229-9268\")\n),\nperson(\ngiven = c(\"Nathaniel\", \"S.\"),\nfamily = \"Pope\",\nrole = \"aut\",\nemail = \"nspope@utexas.edu\",\ncomment = c(ORCID = \"0000-0001-8409-7812\")\n)\n)", "Description": "Maximum likelihood estimation of landscape conductance\nsurfaces from genetic data on raster graphs, using Newton and\nquasi-Newton optimization with analytic derivatives. Fits\nlog-linear conductance models with optional joint estimation of\nGaussian smoothing scales and spline response shapes, linked to\npairwise genetic distances through maximum likelihood\npopulation effects models or to allele-frequency covariance\nthrough a Wishart likelihood on site contrasts, with the same\npairwise distance and environment covariates available in both.\nProvides exact sparse and iterative solvers for large rasters,\nfixed-domain spatial cross-validation for comparing conductance\nformulas, and simulation tools for study design. Works with\n'terra' objects. Fitting one parameterized conductance surface\nto genetic data, rather than regressing on separate resistance\ndistances, follows Peterman and Pope (2021)\n. Background on population-effects\nmodels and circuit-based covariance models is provided by\nClarke, Rothery and Raybould (2002) \nand Hanks and Hooten (2013) ,\nrespectively.", "URL": "https://github.com/wpeterman/terradish,\nhttps://doi.org/10.5281/zenodo.21225711", "BugReports": "https://github.com/wpeterman/terradish/issues", "License": "BSD_3_clause + file LICENSE", "VignetteBuilder": "knitr", "Encoding": "UTF-8", "Config/testthat/edition": "3", "Config/roxygen2/version": "8.0.0", "Config/pak/sysreqs": "libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev\nmake libssl-dev libproj-dev libsqlite3-dev libudunits2-dev", "Repository": "https://wpeterman.r-universe.dev", "Date/Publication": "2026-10-29 13:53:10 UTC", "RemoteUrl": "https://github.com/wpeterman/terradish", "RemoteRef": "HEAD", "RemoteSha": "960db5a5e42c5e5245d667e40cc82cb44fd8dc20", "NeedsCompilation": "yes", "Packaged": { "Date": "2026-11-12 16:48:15 UTC", "User": "root" }, "Author": "Bill Peterman [aut, cre] (ORCID:\n),\nNathaniel S. 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