Tutorials & user notes

I have been writing various tutorials and user notes about the use of open source tools over the years. Some were published as blog posts, others as online tutorials. You can filter the tutorials by subject, or you can use the search function.I hope these are of use to you.

Density distribution map of white-tailed deer

Creating a habitat suitability map for the white-tailed deer using spatial multicriteria analysis and spatial disaggregation in GRASS GIS.

From suitability to suitable regions

Identify and map suitable regions based on a suitability map and user-defined minimum area size, using the r.suitability.regions addon for GRASS GIS.

The canopy height map by WRI and META

Meta and WRI launched a global map of tree canopy height at a 1-meter resolution. This post shows how to download and import the data in GRASS GIS.

Download the AHN data in GRASS GIS

The AHN (Actueel Hoogtebestand Nederland) contains detailed height data for the Netherlands. This tutorial shows how to import the data in GRASS GIS.

Blik op metadata

Lesmateriaal bij de workshop blik op metadata, met achtergrond informatie over het gebruik van metadata en de FAIR-principes. In Nederlands.

Boxplots based on raster data in GRASS GIS

Create boxplots based on raster data in grass gis. Identify the location of outliers, compare different regions and visualize changes in time using raster time series.

MODIS fire data in GRASS GIS

Small walk-true of how to import MODIS satellite images in a GRASS GIS temporal database, and how to compute summary statistics based on these data layers.

Playing with animal tracking data in QGIS

Using the Temporal Controller in QGIS to visualize the movements of cattle in the Logone Floodplain in Cameroon. Based on data from the Movebank, a free, online database of…

Compute the area per category with GRASS GIS

A short recap of how to compute the area of the categories of a raster layer in GRASS GIS using different methods/approaches.

Distance between features

How to calculate the distance of the nearest sighting of mountain lions (point data) to Minnesota (polygon) in GRASS GIS using the GUI or Python code.

Import GBIF data in QGIS

This tutorial shows how to download occurrence data of selected species from the Global Biodiversity Information Facility (GBIF) in QGIS using the GBIF Occurrences plugin.

Import GBIF data in R using RGBIF

This tutorial shows how to download occurrence data of selected species from the Global Biodiversity Information Facility (GBIF) in R and visualize it in R and GRASS GIS.

Access soilgrid data using the WCS protocol

Use the Python OWSLib package to access soilgrid.org data via the Web Coverage Service (WCS) protocol and import the data in GRASS GIS. Use rasterio or GRASS to visualize…

Tree species diversity distribution

Use the r.series.diversity addon for GRASS GIS to generate maps of the tree species diversity across the contiguous USA, based on tree distribution data from Barry Tyler…

Adding functions to the QGIS toolbox

Use the graphical modeler in QGIS to create your own script/tool for the processing toolbox in QGIS.

Import NASA DEM in GRASS GIS

Downloading and importing the NASA DEM from the EarthData website in GRASS GIS using the r.in.nasadem addon.

Creating a map in R using tmap

Use the tmap package in R to easily create maps. Add an inset map to the map, making sure it aligns well with the legend.

Legacy GIS tutorials and notes

Tutorials and user notes on the use of open source tools for (spatial) data handling and analysis. Most are about GRASS GIS, but it also includes posts about R and QGIS.

Import and explore reconstructed MODIS LST data

Import aggregated monthly MODIS LST data layers by Metz et al. (2017) in a GRASS GIS temporal raster data set and visualize the data.

Mapping the number of mammal species based on IUCN redlist range maps

Creating a raster layer with the number of species per raster cell in GRASS GIS based on the IUCN RedList range vector maps.

Spatial interpolation in GRASS GIS

Introduction to spatial interpolation in GRASS GIS, with examples using e.g., voronoi polygons, IDW, trend surface and random forest interpolation.