Classifies a landscape into slope-position and landform classes on the basis of the Topographic Position Index (TPI) and slope, following Weiss (2001) and Jenness (2006). Two classifications are offered: a six-class Slope Position Classification, based on one TPI scale, and a ten-class Landform Classification, based on a small and a large TPI scale. The TPI can be computed over square, circular or annular neighbourhoods, sized in cells or in map units, and standardised either over the whole grid (as in the original method) or locally. Results are returned as an object holding the classified raster, the TPI and slope surfaces, and per-class descriptive statistics, with methods for printing, summarising and plotting.
| Version: | 0.3.0 |
| Depends: | R (≥ 4.1.0) |
| Imports: | graphics, grDevices, stats, terra (≥ 1.7-3) |
| Suggests: | knitr, rmarkdown, testthat (≥ 3.0.0) |
| Published: | 2026-10-22 |
| DOI: | 10.32614/CRAN.package.landform |
| Author: | Gianmarco Alberti [aut, cre] |
| Maintainer: | Gianmarco Alberti <gianmarcoalberti at gmail.com> |
| BugReports: | https://github.com/gianmarcoalberti/landform/issues |
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |
| URL: | https://gianmarcoalberti.github.io/landform/, https://github.com/gianmarcoalberti/landform |
| NeedsCompilation: | no |
| Citation: | landform citation info |
| Materials: | README, NEWS |
| CRAN checks: | landform results |
| Reference manual: | landform.html , landform.pdf |
| Vignettes: |
Landform classification with the Topographic Position Index (source, R code) |
| Package source: | landform_0.3.0.tar.gz |
| Windows binaries: | r-devel: landform_0.2.zip, r-release: landform_0.2.zip, r-oldrel: landform_0.2.zip |
| macOS binaries: | r-release (arm64): landform_0.3.0.tgz, r-oldrel (arm64): landform_0.3.0.tgz, r-release (x86_64): landform_0.3.0.tgz, r-oldrel (x86_64): landform_0.3.0.tgz |
| Old sources: | landform archive |
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