GRASS GIS

MODIS fire data in GRASS GIS

In this post I show how to import 8-day MODIS satellite images from 2002-2021 in a GRASS GIS temporal database, and how to compute some summary statistics based on these data layers.

MODIS fire data in GRASS GIS

Small walk-true of how to import 8-day MODIS satellite images from 2002-2021 in a GRASS GIS temporal database, and how to compute some summary statistics based on these data layers.

Upload raster labels to a point layer attribute table

Introducing the v.what.rast.label addon. An little utility to sample the raster values and labels at point locations defined by a vector point layer. Values and labels are written to the attribute table of the point layer.

Latest GRASS GIS addons now also available for Windows

For Window users, several new GRASS GIS addons that were published recently did not show up in the list of available addons when running the g.extension function. But as a great start of the new year, this has now been fixed.

Creating a density distribution map of white-tailed deer using GRASS GIS

In this GRASS GIS tutorial we create a habitat suitability map for the white-tailed deer (Odocoileus virginianus). We combine this with deer densities numbers per deer management unit to create a fine-scale deer density distribution map.

Compute the area per category

A short note about different ways in GRASS GIS to create a raster layer with as values the surface area of the categories in another raster layer.

Compute the area per category with GRASS GIS

A short note about different methods you can use in GRASS GIS to create a raster layer with as values the area of the categories these cells belong to according to another categorical raster layer.

From suitability to suitable regions

An explanation how you can use the r.suitability.regions add-on to delineate regions with a minimum area size that consist of contiguous raster cells with a suitability score above a certain user-defined threshold.

Distance between features

Calculating the distance between features (points, polygons, lines) is a common GIS task. Here I will use GRASS GIS to calculate the nearest sighting of mountain lions to Minnesota according to the Global Biodiversity Information Facility (GBIF) database.

Legacy GIS tutorials and notes

Tutorials and user notes on the use of open source tools on the old ecodiv site. The objective is to provide some practical / hands-on examples of (spatial) data handling and analysis that can be done in GRASS GIS and related software tools such as R, QGIS and SQLite