Package: tissot 0.3.0
tissot: Tissot Indicatrix for Map Projection Distortion
Compute and visualize the 'Tissot Indicatrix' for map projections. The indicatrix characterizes projection distortion by computing scale factors, angular deformation, areal distortion, and convergence at arbitrary points. Based on the calculations shared by Bill Huber on <https://gis.stackexchange.com/a/5075/482>. Uses 'PROJ' for coordinate transformation and distortion factor computation. Developed using the method published in Snyder, JP (1987) <doi:10.3133/pp1395>.
Authors:
tissot_0.3.0.tar.gz
tissot_0.3.0.zip(r-4.7)tissot_0.3.0.zip(r-4.6)tissot_0.3.0.zip(r-4.5)
tissot_0.3.0.tgz(r-4.6-any)tissot_0.3.0.tgz(r-4.5-any)
tissot_0.3.0.tar.gz(r-4.7-any)tissot_0.3.0.tar.gz(r-4.6-any)
tissot_0.3.0.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
DESCRIPTION |NEWS
card.svg |card.png
tissot/json (API)
| # Install 'tissot' in R: |
| install.packages('tissot', repos = c('https://hypertidy.r-universe.dev', 'https://cloud.r-project.org')) |
Bug tracker:https://github.com/hypertidy/tissot/issues
Pkgdown/docs site:https://hypertidy.github.io
- world - World coastline
Last updated from:8fca11b3e4. Checks:9 OK. Indexed: yes.
| Target | Result | Time | Files | Syslog |
|---|---|---|---|---|
| linux-devel-x86_64 | OK | 161 | ||
| source / vignettes | OK | 190 | ||
| linux-release-x86_64 | OK | 150 | ||
| macos-release-arm64 | OK | 143 | ||
| macos-oldrel-arm64 | OK | 169 | ||
| windows-devel | OK | 77 | ||
| windows-release | OK | 78 | ||
| windows-oldrel | OK | 83 | ||
| wasm-release | OK | 122 |
Exports:indicatrixti_ellipsetissottissot_ablinetissot_get_projtissot_maptissot_rastertissot_set_projtissot_unproject
Dependencies:cligluelifecyclemagrittrpillarpkgconfigPROJrlangtibbleutf8vctrswk
Readme and manuals
Help Manual
| Help page | Topics |
|---|---|
| Subset an indicatrix_list | [.indicatrix_list |
| Build Tissot indicatrix objects | indicatrix |
| Plot an indicatrix | plot.indicatrix |
| Plot a list of indicatrixes | plot.indicatrix_list |
| Generate ellipse coordinates for an indicatrix | ti_ellipse |
| Compute Tissot indicatrix properties | tissot |
| Get or set the current plot projection | tissot_get_proj tissot_set_proj |
| Plot world coastline on a projected map | tissot_abline tissot_map |
| Compute distortion surfaces on a regular grid | image.tissot_raster plot.tissot_raster tissot_raster |
| Unproject coordinates to geographic (lon/lat) CRS | tissot_unproject |
| World coastline | world |
