Downloading volcano data from USGS with R
I noticed that USGS has published JSON data with the volcanoes of the world and that is simply too interesting to miss, so here is a very short R script to view...
Category: GIS
Leaflet coding with ChatGPT
The city of Gothenburg publishes their orthophotos as open data, WMS included. The imagery was collected 1998-2021 and I wanted a simple web map where I could easily switch year and see...
Rendering elevation data like it´s 1985
How about rendering your elevation data in 8 bit style? Even better: Do the rendering in a piece of software not really intended for GIS and maps! Where do I sign up?...
Creating an interactive globe in R
So, you want to create globe with a resolution so low that it´s hard to imagine any use cases? Here is an R script that will do just that. This script will:...
Working with bathymetry data in R
How do you download and style bathymetry data in R? One way is using the marmap library. This script will: More on marmap here.
Copernicus image of the day
Today´s post is more or less a link: Copernicus image of the day. As you might have guessed, it features daily images from the Copernicus programme, the “the Earth observation component of...
Downloading data from OpenStreetMap with R
Surely, it must be possible to create your own map based on data from OpenStreetMap using R? Perhaps a map with all of the restaurants in your area? This script will: #...
Accessing Google Open Buildings in R
Google has published a huge data set with buildings, found at https://sites.research.google/open-buildings/. The data is available in WKT in CSV files, so it needs some basic processing for visualization. Could I use...
Additional basemaps and WMS layers in R/Leaflet
A small collection of additional R code snippets for web maps with R/Leaflet, after the previous article Creating an interactive web map using R/Leaflet. This time, it´s all about basemaps and WMS...
Counting adjacent polygons in PostGIS
Which country has the most neighbours? It´s probably not Australia (surrounded by ocean) or the US (huge country, but few neighbours). Counting polygons manually stops being fun after you reach around 5,...