Requirements

Software requirements

• Operating systems: Linux, macOS, Windows

• Git

• GRASS GIS 7.8

  • r.accumulate to be installed using g.extension

• Python 3 installed with GRASS GIS

  • ProjPicker

• R

  • fOptions package

  • plotrix package

• Workshop Python/R scripts

GitHub repository for the workshop

Clone the workshop repository from https://github.com/HuidaeCho/foss4g-2021-r.topmodel-workshop.

git clone https://github.com/HuidaeCho/foss4g-2021-r.topmodel-workshop.git

We will run this workshop from foss4g-2021-r.topmodel-workshop/run.

cd foss4g-2021-r.topmodel-workshop
mkdir run
cd run

Data requirements

r.topmodel data

r.topmodel requires the following inputs:

• rainfall time series

• evapotranspiration time series

• a topographic index statistics file generated by preprocessing (r.topmodel -p)

r.topidx data

r.topidx requires an elevation raster map.

Data sources

Digital elevation models

The following digital elevation model (DEM) products cover most of the world:

• Shuttle Radar Topography Mission (SRTM)

• Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model

• Advanced Land Observing Satellite (ALOS) World 3D - 30m

All these products are available free of charge in 1°x1° tiles at a 1-arcsecond (approximately 30-m) resolution.

ASTER and SRTM data can be downloaded from EarthExplorer.

Weather forcing data

The National Centers for Environmental Information (NCEI) provides an application programming interface (API) for downloading weather data from the Climate Data Online (CDO) web services.