Oliver Wipfli

Does not have a lot of "meat on the bone" but still, here is a small blog post on "Renting a Server Room With Fiber Internet": oliverwipfli.ch/renting-a-se...

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! Slides and recording: oliverwipfli.ch/presentation...

Blog post about "Finding Cheap Compute": oliverwipfli.ch/finding-chea...

Blog post "Callback on File System Reads": oliverwipfli.ch/callback-on-...

Tiered local storage: Working with aerial imagery comes with some very enjoyable technical problems around storage. I wrote a small blog post about the storage system of Mapterhorn. Read more here: oliverwipfli.ch/tiered-local...

I wrote a small blog post about Mapterhorn's current status and the plans on adding aerial imagery: oliverwipfli.ch/mapterhorn-u...

oliverwipfli.ch/canvas-multi...

MapLibre GL JS can still use server-generated pbf fonts, but it does not have to use them any more thanks to github.com/maplibre/map...

Mapterhorn v0.0.4 ships high-resolution terrain data for Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Italy, Latvia, Luxembourg, Romania, Slovakia, Slovenia, and Spain. Explore the map at mapterhorn.com/viewer/#map=...

Great overview of Mapterhorn! Thanks @bdon.org

Mapterhorn v0.0.2 ships smaller tiles that are optimized for size while keeping the same visual quality, missing data in Caucasus and polar regions were added, and you can now use the pmtiles cli tool to make small area extracts. mapterhorn.com

This is amazing, a beautiful, global terrain layer in PMTiles format! Thank you for making this Oliver @oliverwipfli.ch!

Have you been waiting for "Protomaps Terrain"? It's arriving! @mapterhorn.com is an independent project created by @oliverwipfli.ch - a global elevation model built from multiple sources, distributed as a single PMTiles archive

Mapterhorn v0.0.1 has been released. It is an aggregation of the global Copernicus GLO-30 low-resolution digital elevation model with the Swiss swissALTI3D high-resolution model. mapterhorn.com

Got some settings wrong

try out a new Rasterio plugin for converting GeoTIFF to PMTiles: pip install rio-pmtiles github.com/protomaps/PM...

Tilezen railways at zoom 5. Can inspect the map here by selecting only the transit layer: pmtiles.io?url=https%3A...

We're seeking funding to take @source.coop to the next level.

I have been appointed as the CEO of MIERUNE. I will do my best to contribute to society and clients more than ever by geospatial technology. www.mierune.co.jp?lang=en

ChatGPT guesses correctly in 78 out of 93 test cases if a Burmese string uses Zawgyi or Unicode encoding. Not too bad... Test cases were taken from CLDR github.com/unicode-org/...

I am buying a new computer. Thanks @bdon.org for helping me choosing those parts...

Small blog post about how country, state, and city labels are placed at low zoom levels on Google Maps: oliverwipfli.ch/positioning-...

Collapsing carriageways. Points are attracted by 1/distance and cos(angle difference of attached line segments). Feels a bit like Physics... wipfli.github.io/magnetron/bo...

MapLibre GL JS v5.0.0 has been released and it comes with a nice new globe feature. Congrats everyone who worked on this! maplibre.org/maplibre-gl-...

I just remembered that some time ago I vectorized the hand-drawn hillshading of swisstopo and put it on a MapLibre-based map. Demo: wipfli.github.io/swiss-map/ve...

I'm experimenting with highway generalization for low zoom levels. In this screenshot I made the lines collapse by looking for close by points up to a certain radius, then taking the midpoint of those. Doing this multiple times converges the points and sort of smooths lines...

I am looking a bit into vertical text layout of Japanese in MapLibre GL JS. Interesting how some characters are displayed with 90 degree rotation in vertical text. For example the string "(東京タワー…)" becomes this

Selecting which roads to display on a map at a given scale is an interesting problem. One approach is the stroke-mesh method which prunes roads based on local density and length of dead-ends. Have a look at Benz and Weibel 2014 www.zora.uzh.ch/id/eprint/10...

At Thursday's GeoBeer #46 in Rapperswil I will share a poster with the title "Vector Tiles Overview". Looking forward to meet you there if you are around...

The PMTiles MapLibre GL JS plugin supports now tile pyramids with multiple maxzooms. That's nice when you want to put for example z14 data for Switzerland and z8 data for the rest of the world into one .pmtiles file. Thanks @bdon.org for working on this... github.com/protomaps/PM...

Google Maps seems to show links between motorways at all zoom levels, but links from motorway to primary roads seem to be visible only from zoom 12. Has anyone done something like this with OpenStreetMap data?

Identifying road importance by routing between 10k buildings in Zürich. Uses OpenStreetMap data and OSRM for routing...