Book
Linking R with the Open-Source SAGA-GIS Software
- Title
- Linking R with the Open-Source SAGA-GIS Software
- Creator(s)
- Pawley S.
- Date
- 2023
- Language
- eng
- Abstract
- Rsagacmd provides an R scripting interface to the open-source System for Automated Geoscientific Analyses Geographical Information System software SAGA-GIS. The current version has been tested using SAGA-GIS versions 2.3.1 to 9.2 on Windows (x64), macOS and Linux. Rsagacmd provides a functional approach to scripting with SAGA-GIS by dynamically generating R functions for every SAGA-GIS tool based on the user's current SAGA-GIS installation. These functions are generated by the saga_gis function and are included within an S3 object as a named list of libraries and tools. This structure facilitates an easier scripting experience by organizing the large number of SAGA-GIS tools (>700) by their respective library. Interactive scripting can also fully take advantage of code autocompletion tools (e.g. in Rstudio), allowing for each tool's syntax to be quickly recognized. Furthermore, the most common types of spatial data (rasters using the terra and stars packages, and vector data using sp, sf or terra packages) along with non-spatial data are seamlessly passed from R to the SAGA-GIS command line tool for geoprocessing operations, and the results are automatically loaded as the appropriate R object. Outputs from individual SAGA-GIS tools can also be chained using pipes from the magrittr and dplyr packages to chain complex geoprocessing operations together in a single statement.
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