Posts

The posts below are mostly focussed on the use of open source software in research and education. And to specificy this even further, it will likely be about the use of GIS and other analytical tools. But, I might get inspired and write about a totally different subject. I will also migrate some of the potentially useful blogposts from Ecostudies over to this site, so I can eventually shut that one down.

Import GBIF data in QGIS

The Global Biodiversity Information Facility ( GBIF) is an international open data infrastructure that allows anyone, anywhere to access data about all types of life on Earth, shared across national boundaries via the Internet.

Interactive dashboards with R

Dashboards provide a great way to communicate information and insights about a particular set of data, or combination of data sets. Within the R ecosystem, there are various tools to build interactive dashboards. In this blogpost, I provide an example of a static, but interactive dashboard build in R.

Linking spatial and non-spatial dataframes

When linking a spatial dataframe and a non-spatial dataframe in R using the the dplyr syntax, note that the order in which you do this matters.

Access soilgrid data using the WCS protocol

The soil data layers from soilgrid.org provides access to grid layers representing the spatial distribution of soil properties across the globe. There are various ways to access this data, including the Web Coverage Service (WCS) protocol. This post provides an example of how to use the OWSLib pacakge to access soil grid layers for your area of interest.

RStudio meets Zotero

There is certainly something to look forward to in the upcoming RStudio version 1.4. With the all new visual RMarkdown editor and integration with Zotero, you can not only run your analyses in RStudio, you can also write the report with ease.

Tree species diversity distribution

A short description how to use the r.series.diversity addon for GRASS GIS to generate maps of the tree species diversity across the contiguous USA, based on tree species distribution data by Wilson et al. 2013

Huis ter Heide

You may get depressed from all the news about the loss of our biodiversity in the Netherlands. But that doesn’t mean there aren’t still beautiful places to be found.

Adding functions to the QGIS toolbox

The graphical modeler is a great way to automate tasks, using the routines in the QGIS toolbox. However, what to do if you need a function not available in the toolbox? In that case you may want to look into writing your own script.

GISQuick

There are several ways you can publish or share your maps, created in QGIS, online. One very easy way is to use the Gisquick publishing platform. It basically requires two steps only; create a QGIS project, and upload it

Import NASA DEM in GRASS GIS

The NASADEM_HGT dataset is a 1 arcsecond void-filled dataset which combines data from the SRTM and ASTER GDEM data. It can be downloaded from EarthData in 1° by 1° tiles. But if you are using GRASS GIS, downloading is greatly fascilitated using the r.in.nasadem addon. The addon imports all NASADEM tiles covering the current region or region extents given with the region option into GRASS and patches the tiles together.