r-package

Buffer areas for nearest neighbours or national marine areas delineation

A few weeks ago, Christina Buelow asked on Twitter how she could create the polygons of coastal waters using the land polygons, and making sure there is no overlap in buffer areas. This would make it possible to know which land area is closest to any place in the sea. Let’s explore what solution …

Read more

Find most retweeted tweets of the #rspatial bot

Bots that retweet #rspatial and #BioImageAnalysis tweets are working well. It is now time to add a little functionnality with the best retweeted tweet of the month, a function added to {tweetrbot} package. […] If you want to explore this dataset a little longer, feel free ! You can get …

Read more

Follow moving particle trajectory over raster with {rayshader}

{rayshader} is a fantastic package for 3D mapping, but it comes with the limitations of {rgl}. I always found it a shame not being able to travel in all directions over my 3D objects. In this blog post, I will show a trick to simulate particle trajectory in 3 dimensions like in a “first person” …

Read more

Create a twitter bot on a Raspberry Pi 3 using R

With Marion Louveaux, we decided that we had to build a Twitter bot for our preferred hashtag. We explored different possibilities but truth is I couldn’t resist building it using R and {rtweet}. Here are the steps I used to set up a Twitter bot on my Raspberry Pi. […] I use package {rtweet} …

Read more

Render mesh3d objects with rayshader and rayrender

People like to show 3D images in their presentations because it usually impresses the audience. Does it really ? I do not care ! I am just looking for an opportunity to play with some 3D images… This blog post is a detailed version of some 3D images shown during my presentation “Everything but maps …

Read more

Play with spatial tools on 3D cells images

Let’s play with mapping tools on non-maps data ! {rayshader} is nice on raster maps, but what about using it on segmentized plant cell? […] I wanted to find a good reason to play with Tyler Morgan-Wall packages for 3D visualisation of raster data: {rayshader} and {rayfocus}. Using cell …

Read more

Spatial interpolation on Earth as a 3D sphere

Earth map is usually presented flat. Geographical coordinates usually go from -180° to +180°. Spatial interpolations using coordinates may be tricky as -180° is equal to +180°. Here I propose a way to realize spatial interpolations on Earth as a sphere and then map the outputs in 3D using rgl. The …

Read more

SDMSelect: Cross-validation model selection and species distribution mapping

This library has originally been created for covariates selection to predict species distribution (biomass, density or presence/absence). Its final aim is thus to produce maps of predicted distributions (Look at vignette SDM_Selection). However, the core of the library is a N-times k-fold …

Read more