On Friday I had the pleasure of giving a talk with the title "Mapterhorn Terrain and Imagery" at this year's State of the Map conference in Paris.
A big thank-you to the organizers!
«Government agencies collect and share digital terrain models and aerial imagery as open data. Terrain and aerial imagery are often used as background below OpenStreetMap vector data on interactive web maps. But so far, only commercial actors have aggregated open terrain and aerial imagery datasets at scale into a unified data product. The Mapterhorn project aims to bring together all available open terrain and aerial imagery data in one place and share it free of charge as PMTiles downloads. In this talk, we will first have a look at the terrain pipeline which was applied to more than 15 TiB of raster elevation data. We will then look into how the aggregated terrain PMTiles can be used in applications. Finally, we will discuss the ongoing efforts to extend the existing terrain pipeline to aerial imagery.»
https://peertube.openstreetmap.fr/w/dwq7DhNYbdQuHoanMKqdoc
This was the first time I used a tool called Marp to create slides. It takes Markdown .md files as input and outputs a PDF. But I think I will not use it again because I was too much lost between that mix of HTML, CSS, and Markdown. Maybe next time I will just use Inkscape all the way. If you want to look at the source code for the slides you can find it at https://github.com/wipfli/sotm-2026-presentation.