{ "_id": "6acdaea4a14063b82c3ac631", "Package": "tissot", "Title": "Tissot Indicatrix for Map Projection Distortion", "Version": "0.3.0", "Authors@R": "c(\nperson(\"Michael\", \"Sumner\", email = \"mdsumner@gmail.com\", role = c(\"aut\", \"cre\", \"cph\"),\ncomment = c(ORCID = \"0000-0002-2471-7511\")),\nperson(\"Bill\", \"Huber\", role = \"aut\",\ncomment = \"original algorithm and calculations\")\n)", "Description": "Compute and visualize the 'Tissot Indicatrix' for map\nprojections. The indicatrix characterizes projection distortion\nby computing scale factors, angular deformation, areal\ndistortion, and convergence at arbitrary points. Based on the\ncalculations shared by Bill Huber on\n. Uses 'PROJ' for\ncoordinate transformation and distortion factor computation.\nDeveloped using the method published in Snyder, JP (1987)\n.", "License": "MIT + file LICENSE", "Encoding": "UTF-8", "LazyData": "true", "Roxygen": "list(markdown = TRUE)", "Config/testthat/edition": "3", "URL": "https://hypertidy.github.io/tissot/,\nhttps://github.com/hypertidy/tissot", "BugReports": "https://github.com/hypertidy/tissot/issues", "Language": "en-US", "Config/roxygen2/version": "8.0.0", "Config/pak/sysreqs": "libproj-dev", "Repository": "https://hypertidy.r-universe.dev", "Date/Publication": "2026-07-12 15:35:32 UTC", "RemoteUrl": "https://github.com/hypertidy/tissot", "RemoteRef": "HEAD", "RemoteSha": "8fca11b3e4b3698428c858999027aca610ca91d8", "NeedsCompilation": "no", "Packaged": { "Date": "2026-10-13 04:00:54 UTC", "User": "root" }, "Author": "Michael Sumner [aut, cre, cph] (ORCID:\n),\nBill Huber [aut] (original algorithm and calculations)", "Maintainer": "Michael Sumner ", "_user": 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