Volker Krause

Free Software and Open Data contributor. At home at #KDE :kde:, also contributing to #Qt, #Wikidata, #OSM :osm: and #Transitous.

Blog: https://volkerkrause.eu
KDE Gitlab: https://invent.kde.org/vkrause
Languages: de, en

Public Key

npub14t7lh0l0vs4m5ahfg7d50hm7mkfl7jaf9cghvrfuk4rh638z5tvq8wk3ah

NIP-05 Address

[email protected]

Profile Code

nprofile1qqs24l0mhlhkg2a6wm550x68maldmyllfw5juytkp57t23magn329kqprpmhxue69uhhyetvv9ujumt0d4hhxarj9ecxjmntqyv8wumn8ghj7un9d3shjtnndehhyapwwdhkx6tpds4690tn

Publishing to

relay.momostr.pink

relay.snort.social

nostr.wine

Author Public Key

npub14t7lh0l0vs4m5ahfg7d50hm7mkfl7jaf9cghvrfuk4rh638z5tvq8wk3ah

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Last Notes

2026-08-31 18:04:41 CEST

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hier war es heute wieder das klassische Kontrollwahrscheinlichkeit/-intensität korreliert rein zufällig mit RGB-Wert...
(und nebenbei dadurch auch meinen Anschluss verpasst)

2026-08-31 14:46:15 CEST

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CoMaps <-> Transitous integration is being worked on, see e.g. the "Outlook" section of https://2026.stateofthemap.org/sessions/DDJRVU/

2026-08-27 09:44:39 CEST

Headed to Paris for #SotM2026, and just in time for that the indoor map used by #KDE Itinerary and Kongress got support for displaying #Panoramax images :)
https://cdn.masto.host/floss/media_attachments/files/117/166/348/544/216/237/original/a384fe02f2b07176.png

2026-08-23 20:18:42 CEST

Joined #BoilingTheOcean a bit today, for discussing #NFC and portal APIs (and a small sidetrack on ICAO Doc 9303). Broad agreement on what we want between #GNOME and #KDE, still some research to do on how we best get that from the two and a half or so user space NFC daemons there are.

2026-08-17 12:39:48 CEST

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Nice, I was wondering whether such a bridge exits but hadn't found any, thank you!

2026-08-15 07:49:17 CEST

Looking at where we are with #NFC for #LinuxMobile in general, and for #KDE applications and #PlasmaMobile in particular: https://www.volkerkrause.eu/2026/08/15/kde-nfc-integration.html
The kernel level seems reasonable, anything in userspace is in a less convincing state unfortunately. Fixing and completing this shouldn't be too hard, but needs a few decisions on the direction.

2026-08-01 12:10:13 CEST

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The back key issue is a known problem in the underlying toolkit, affects only some Android versions apparently, which makes it hard to track down unfortunately.

2026-08-01 08:50:32 CEST

A new combined journey details view, ride sharing and support for new Apple Wallet pass formats - the past two months around #KDE Itinerary: https://volkerkrause.eu/2026/08/01/kde-itinerary-june-july-2026.html

2026-07-18 08:56:19 CEST

Here's a few more details on what we discussed at last week's workshop on mapping indoor spaces in #OpenStreetMap, and why that level of detail matters: https://volkerkrause.eu/2026/07/18/osm-indoor-workshop-july-2026.html

2026-07-11 09:18:36 CEST

At HTW Berlin in Schöneweide for working on tagging and modelling issues of indoor spaces in #OSM.
Some of this has proven challenging over the past years as it requires to carefully balance easy mapability and maintainability, the needs of 2D, 3D and tactile rendering, graph- and area-based routing, BIM compatibility, and being able to model all accessibility-relevant properties. Let's see if locking people from all those areas in a room for two days helps :)

2026-07-06 17:48:30 CEST

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Interesting analysis, and indeed a perfect topic for @npub13py…9w0z :)
There's a few people in #opentransport:matrix.org looking at this for archiving static and realtime data as well. While the focus there seems to be efficient differential storage, there's probably quite a bit of overlap.
For offline routing there's also experiments using extracts in the MOTIS-internal data format in client apps directly, together with CoMaps.

2026-06-27 12:35:45 CEST

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There's nothing standardized I'm aware of, this is all small system vendor specific scripts that pull more or less raw GPS data from an API endpoint on the Wi-Fi network, the same thing that usually backs the map view in onboard portals.

2026-06-27 08:03:47 CEST

Filling a few gaps in the location/positioning stack for #KDE and #Qt applications on #LinuxMobile: https://volkerkrause.eu/2026/06/27/kde-xdg-portal-location-api.html

2026-06-13 08:56:00 CEST

An update on a whole bunch of recent work on Android platform support for #KDE applications, and what's about to change there: https://volkerkrause.eu/2026/06/13/kde-android-news-june-2026.html
#KeepAndroidOpen

2026-05-30 15:08:01 CEST

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Not sure that's possible, we don't touch the font at all, this is the default Qt gives us. And it would need to be done consistently in all components that provide UI as well. The proper solution is to fix this in Qt.

2026-05-30 14:41:16 CEST

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That's not intended and doesn't affect all devices. It's an old Qt problem that keeps resurfacing since quite some time, unfortunately never on a device where I could actually debug it :(

2026-05-30 10:14:47 CEST

Booking URLs, updated foundations for the Android packages, more detailed GBFS vehicle information - the past two months around #KDE Itinerary: https://volkerkrause.eu/2026/05/30/kde-itinerary-april-may-2026.html

2026-05-20 17:39:27 CEST

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Beobachtung über die letzten Monate dazu hier: Es scheint eher zufällig zu sein (tendenziell häufiger im Ausland, seltener im ICE WiFi). Wenn man davon getroffen wird hilft es den User-Agent zu wechseln (egal wozu!). Das Spiel wiederholt sich dann alle paar Anfragen.

2026-05-09 09:38:38 CEST

A few more details on the organizational work around #OpenTransport2026 and #Transitous from last week's #FOSSGIS community meeting: https://volkerkrause.eu/2026/05/09/fossgis-community-meeting-may-2026.html

2026-05-02 18:48:27 CEST

On the way back home from joining the @npub18x8…fzxm Community Meeting at Linuxhotel in Essen for two days, for working on various organizational details for the @npub13py…9w0z conference.
We should be able to open the registration soon, later than originally anticipated but at least we wont have to run a 100+ attendee conference as a few individuals without a legal entity behind this anymore.
#OpenTransport2026

2026-04-26 11:44:22 CEST

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I'd say this isn't even limited to flights but common to all (long distance) travel. Both multi-criteria routing algorithms and UIs for more manual control (e.g. [@trans_europe_planner](https://fosstodon.org/@trans_europe_planner )) are being looked into to help with that.
Cost/availability is currently tricky to consider given the lack of open data. But e.g. optimizing uninterrupted sleep time on night trains could be possible.
Either way, the first step is getting the basic schedule data in, all the above builds on top of that.

2026-04-26 10:58:21 CEST

Experimenting with adding international flights to @npub1c64…jwxh. Performance seems to hold up and we indeed get working multi-modal door-to-door routing from e.g. Brussels to Tokyo.
There's a few issues with the router cheating around minimum transfer times that need to be sorted out before this could be deployed though.
https://cdn.masto.host/floss/media_attachments/files/116/470/169/827/549/088/original/8cb69a7dda8578b9.png

2026-04-18 10:11:38 CEST

AppStream-based in-app release notes, Android crash reporting, better popup notification configuration for Flatpak apps and many other things were discussed at last week's pre-#GLT26 #KDE sprint in Graz: https://volkerkrause.eu/2026/04/18/kde-sprint-linuxtage-graz-2026.html

2026-04-10 09:45:15 CEST

Following 5 days of #KDE sprint at #TUGraz, #GLT26 is starting today. I'll be speaking about @npub1c64…jwxh tomorrow 15:15 in HS i7.
https://pretalx.linuxtage.at/glt26/talk/AJZHEG/

2026-04-04 07:52:56 CEST

#OSM indoor mapping & routing, #Transitous, #KDE Itinerary, #OpenTransport2026 logistics, and dynamic traffic data - some notes from #FOSSGIS2026 - https://volkerkrause.eu/2026/04/04/osm-fossgis-conferenz-2026.html

2026-03-28 07:14:26 CET

New welcome page, warnings about potentially unpleasant mistakes, and support for opentransportdata.swiss OJP 2.0 and train formation APIs - the past two months around #KDE Itinerary - https://volkerkrause.eu/2026/03/28/kde-itinerary-february-march-2026.html

2026-03-21 10:54:20 CET

Another small preparation for traveling to Switzerland for #OpenTransport2026: #KDE Itinerary now warns when leaving the EU roaming regulation area if you happen to live inside that.
https://cdn.masto.host/floss/media_attachments/files/116/266/551/429/966/488/original/3ac4213d27072762.png

2026-03-14 10:28:23 CET

In preparation for the #OpenTransport2026 conference #KDE's travel apps Itinerary and KTrip will support the Swiss OpenJourneyPlanner 2.0 and train formations APIs in the upcoming 26.04 release.
https://cdn.masto.host/floss/media_attachments/files/116/226/810/481/260/376/original/63d2a94d1c423823.png
https://cdn.masto.host/floss/media_attachments/files/116/226/813/689/632/228/original/a35a94a44f067fa7.png

2026-02-28 11:04:53 CET

Ride sharing, meta stations and SIRI-FM realtime elevator data for #Transitous, and a few improvements for #KDE Itinerary - some of the things we worked on during the #OSM Hack Weekend at @npub1ry5…ssp7 in Karlsruhe last week: https://volkerkrause.eu/2026/02/28/osm-hack-weekend-karlsruhe-february-2026.html

2026-02-07 12:07:43 CET

Some impressions from the #KDE and #Transitous presence at #FOSDEM this year: https://volkerkrause.eu/2026/02/07/fosdem-2026.html

2026-01-30 10:21:04 CET

From the way to #FOSDEM, here's what has happened in the past two months around #KDE Itinerary: https://volkerkrause.eu/2026/01/30/kde-itinerary-december-january-2026.html
MapLibre-based vector maps, manual control over reservation cancellation states and more work on reverse engineering train ticket barcodes, among many other things.

2025-12-13 10:29:16 CET

Working on email code at the #KDE PIM sprint in Paris this weekend, in a very appropriate location for that.
https://cdn.masto.host/floss/media_attachments/files/115/711/545/432/646/636/original/0b0b75a7592b0a02.jpg

2025-11-29 11:20:01 CET

Simplified journey search, more fine-grained deletion options, display of altitude live data - the past two month around #KDE Itinerary: https://volkerkrause.eu/2025/11/29/kde-itinerary-october-november-2025.html

2025-11-15 08:28:00 CET

Here's some of the things I did at the recent #OSM Hack Weekends in Berlin at @npub1fjw…k7cv and Karlruhe at @npub1ry5…ssp7: https://volkerkrause.eu/2025/11/15/osm-hack-weekends-berlin-karlsruhe-october-november-2025.html
#OpenStreetMap #Transitous #KDE

2025-10-04 10:44:16 CEST

Journey searches from the current location, a built-in currency converter, the ability to store hotel room access information, and much more - the past two months around #KDE Itinerary: https://volkerkrause.eu/2025/10/04/kde-itinerary-august-september-2025.html

2025-09-27 10:24:13 CEST

Making #KDE's mobile applications handle screen cutouts, rounded screen corners and platform UI elements on the app surface: https://volkerkrause.eu/2025/09/27/kde-android-news-september-2025.html

2025-09-11 11:24:17 CEST

#KDE's upcoming emergency alert integration based on [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) seems to have worked flawlessly for Germany's nationwide test alert.
https://cdn.masto.host/floss/media_attachments/files/115/184/930/645/483/695/original/645aa2c74cc40f4d.png
https://cdn.masto.host/floss/media_attachments/files/115/184/932/736/143/295/original/01d492fe75762b6d.png

2025-08-30 10:18:56 CEST

Both for selecting public transport backends in #KDE Itinerary as well as for [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) we have the need for computing simplified hulls of geographic coverage areas. Here's how we currently do that: https://volkerkrause.eu/2025/08/30/simplified-coverage-polygons.html
As this doesn't seem to be such an uncommon problem, are there better approaches for this?

2025-08-16 09:09:02 CEST

Less than 3 weeks until #KDE #Akademy2025! I'll be talking about [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) and bringing emergency and weather alerts to Plasma (Mobile) - https://volkerkrause.eu/2025/08/16/kde-gettings-ready-for-akademy-2025.html

2025-08-02 09:13:41 CEST

Manually adding train/bus trips, more flexible alternative connection search, new departure details view, better location search - the past two months around #KDE Itinerary: https://volkerkrause.eu/2025/08/02/kde-itinerary-june-july-2025.html
#Transitous

2025-06-28 08:23:27 CEST

As this question came up while we were at TU Graz a few weeks ago for the #KDE Plasma sprint and #GLT25, here are some hints on tools and approaches to do #OSM indoor mapping based on to scale building plan images: https://volkerkrause.eu/2025/06/28/osm-mapping-building-interiors.html

2025-06-14 08:43:32 CEST

Here's an overview of the public transport data that goes into #Transitous via #GTFS, #GBFS and #OSM, and how you can help to extend this in your region: https://volkerkrause.eu/2025/06/14/transitous-adding-data.html
Any improvement there benefits applications like #GNOME Maps, #KDE Itinerary or #Träwelling.

2025-05-31 09:34:19 CEST

More train and bus trip editing capabilities, a new departure view, #OpenRailwayMap integration and a ton of new features in #Transitous - the past two months around #KDE Itinerary: https://volkerkrause.eu/2025/05/31/kde-itinerary-april-may-2025.html
@npub1qla…qv2c

2025-05-24 09:09:28 CEST

In October we'll have the first dedicated conference for the Open Transport community in Vienna, and it's Call for Participation is now out: https://volkerkrause.eu/2025/05/24/open-transport-community-conference-2025-call-for-participation.html
#OpenTransport2025 #Transitous

2025-05-23 17:34:16 CEST

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Going to #KDE #Akademy2025 by train from within Germany? Then also check the event discount offered by Deutsche Bahn for Akademy attendees (which nowadays also seems combinable with BahnCard discounts): https://www.veranstaltungsticket-bahn.de/?event=32119&language=en

2025-05-17 08:07:14 CEST

Contributing to or interested in #Transitous? Then join us at the first Transitous Hack Weekend in July in Berlin! https://volkerkrause.eu/2025/05/17/transitous-upcoming-hack-weekend-july-2025.html

2025-05-01 08:44:24 CEST

Here's some of the things we did at #KDE's #GLT25-adjacent Plasma (Mobile) Sprint last week at TU Graz: https://volkerkrause.eu/2025/05/01/kde-plasma-mobile-sprint-graz-2025.html

2025-04-23 23:08:13 CEST

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Productive day with a bunch of fixes and improvements for #KDE Itinerary, and ending with some differential analysis of NFC hotel key cards over dinner :)

2025-04-22 11:38:42 CEST

On the way to the #KDE Plasma (Mobile) Sprint in Graz, and putting the final touches on the @npub1x5a…0mgg support in Itinerary's live view.
https://cdn.masto.host/floss/media_attachments/files/114/380/935/140/447/240/original/26e08d33f43f7881.png
https://cdn.masto.host/floss/media_attachments/files/114/380/937/581/085/706/original/0b6e3b2e10624172.png

2025-04-18 08:07:55 CEST

A bunch of updates coming to #KDE's #UnifiedPush push notification infrastructure: https://volkerkrause.eu/2025/04/18/kde-kunifiedpush-webpush.html

2025-03-30 13:20:58 CEST

Localized units, DOSIPAS ticket barcode support, GBFS support in #Transitous and a bunch of conference talks - the past two months around #KDE Itinerary: https://volkerkrause.eu/2025/03/30/kde-itinerary-february-march-2025.html
@npub1qla…qv2c

2025-03-29 19:18:54 CET

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The video recording of my #FOSSGIS2025 talk about #Transitous (in German) is available here: https://pretalx.com/fossgis2025/talk/TJVVDZ/

2025-03-26 09:16:01 CET

On the way to Münster for #FOSSGIS2025 with a packed schedule: I'll talk about #Transitous (https://pretalx.com/fossgis2025/talk/TJVVDZ/) and co-chair the Open Transport Meetup (https://pretalx.com/fossgis2025/talk/GQK9KU/) and Indoor #OSM Meetup (https://pretalx.com/fossgis2025/talk/DSHE3R/).

2025-03-08 10:34:40 CET

Improvements in localization and packaging, and an encounter with a bizarre calling convention issue in JNI: Recent work around the Android platform support of #KDE applications - https://volkerkrause.eu/2025/03/08/kde-android-news-march-2025.html

2025-02-26 12:18:02 CET

Today at 17:00 UTC I'll do a short presentation at the #Wikidata #DataReuseDays2025 about how we use Wikidata in #KDE Itinerary: https://www.wikidata.org/wiki/Event:Data_Reuse_Days_2025

2025-02-22 10:31:01 CET

Here's what I did at last week's #OSM Hack Weekend in Karlsruhe: https://volkerkrause.eu/2025/02/22/osm-hack-weekend-karlsruhe-february-2025.html #KDE #Transitous

2025-02-09 09:58:41 CET

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The video recording is now available at https://fosdem.org/2025/schedule/event/fosdem-2025-5102-weather-and-emergency-alerts/

2025-02-08 10:44:43 CET

My impressions from #FOSDEM around #KDE, #Transitous and [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ): https://volkerkrause.eu/2025/02/08/kde-fosdem2025.html

2025-02-01 08:51:30 CET

Today at 15:45 @npub1ra6…xx6e and I will talk about [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) in the FOSS on Mobile Devices track (room H.2214) at #FOSDEM - https://fosdem.org/2025/schedule/event/fosdem-2025-5102-weather-and-emergency-alerts/
#KDE #FOSSWarn

2025-01-31 08:38:35 CET

From the way to #FOSDEM here's what happened around #KDE Itinerary in the past two months: https://volkerkrause.eu/2025/01/31/kde-itinerary-december-january-2025.html - A redesigned timeline UI and #Transitous completing the migration to #MOTIS v2, to just name two things.

2025-01-18 12:33:19 CET

Going to #FOSDEM 2025: there will be a #KDE stand, a talk to celebrate #Transitous' first birthday and @npub1ra6…xx6e and I will present [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) - https://volkerkrause.eu/2025/01/18/kde-fosdem-2025-preview.html

2025-01-04 13:20:59 CET

Some notes and impressions from attending #38C3: https://volkerkrause.eu/2025/01/04/kde-38c3-impressions.html
As a direct result of that a few changes have already landed in #KDE Itinerary's travel document extractor towards decoding FCB v3 ticket barcodes as used by e.g. Trenitalia.

2024-12-30 12:12:17 CET

Today @npub1ra6…xx6e and I will talk about free and open infrastructure for receiving emergency and weather alerts (aka [@foss_public_alert_server](https://floss.social/@foss_public_alert_server )) at #38C3, 16:40 on stage HUFF - https://events.ccc.de/congress/2024/hub/en/event/wie-man-auch-mit-foss-katastrophen-warnungen-bekommt/
Live stream should be at https://streaming.media.ccc.de/38c3/huff
#FOSSWarn #KDE

2024-12-29 09:57:30 CET

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And in case you couldn't follow it live yesterday, here is the recording of @npub1yd7…jtsx's great #Transitous talk at #38C3: https://media.ccc.de/v/38c3-transitous-offener-routingdienst-fr-ffentliche-verkehrsmittel (with #KDE Itinerary also briefly appearing in a live demo)

2024-12-28 09:50:23 CET

Don't miss @npub1yd7…jtsx's talk about #Transitous at #38C3 today at 12:00 on stage YELL - https://events.ccc.de/congress/2024/hub/en/event/transitous-offener-routingdienst-fr-ffentliche-verkehrsmittel/ - Live stream: https://streaming.media.ccc.de/38c3/yell

2024-12-22 08:05:13 CET

#KDE will be at #38C3 this year again, as part of the Bits & Bäume Habitat and with three talks featuring cross-project collaborations on public transport routing, weather/emergency warnings and combating e-waste - https://volkerkrause.eu/2024/12/22/kde-38c3-preview.html

2024-12-15 13:09:32 CET

Spontaneous #KDE sprint in @npub1rcz…uu2f's kitchen yesterday. Last time we did that it started the work on the per-trip timeline view of Itinerary. This time a lot of effort had to go into damage control due to the rumored imminent shutdown of Deutsche Bahn's Hafas API endpoint that much of the FOSS public transport tooling depends on.

2024-11-30 09:08:36 CET

New trip map view, per-trip statistics, Android platform integration improvements and preparations for #Transitous moving to #MOTIS v2 - the past two month around #KDE Itinerary: https://volkerkrause.eu/2024/11/30/kde-itinerary-october-november-2024.html

2024-11-01 07:44:06 CET

Small update on the work on [@foss_public_alert_server](https://floss.social/@foss_public_alert_server ) and impressions from last week's #CAP workshop: https://volkerkrause.eu/2024/11/01/kde-foss-emergency-and-weather-alerts.html #KDE

2024-10-26 11:15:28 CEST

Side-effect of implementing #MOTIS v2 support during the #OSM Hack Weekend in Karlsruhe: we now also have a full trip map view in #KDE Itinerary: https://volkerkrause.eu/2024/10/26/osm-hack-weekend-october-2024.html

2024-10-19 09:14:30 CEST

At the #OSM Hack Weekend in Karlsruhe, preparing #KDE Itinerary for the #MOTIS v2 upgrade of #Transitous.

2024-10-18 09:41:44 CEST

Another direct result of #Akademy2024: Progress on building #KDE Frameworks and apps statically, should help with making Android APKs more compact and removes an obstacle for exploring iOS support - https://volkerkrause.eu/2024/10/18/kf6-static-builds.html

2024-10-12 10:14:31 CEST

Some recent improvements on the Android platform integration of #KDE applications, in large parts a direct result of #Akademy2024 - https://volkerkrause.eu/2024/10/12/kde-android-news-oct-2024.html

2024-10-03 10:59:43 CEST

New per-trip timeline view, extended public transport location search, new transport icons, new website, increased public transport data coverage and many more improvements: it's been a busy two months for #KDE Itinerary again - https://volkerkrause.eu/2024/10/03/kde-itinerary-august-september-2024.html

2024-09-20 10:23:31 CEST

At #matrixConf today and tomorrow.
Conference number 4 and conference day 10 this month.

2024-09-14 08:44:46 CEST

Barely back from #KDE #Akademy2024 and already off to the #Nextcloud conference.
Managed to write down some Akademy impressions inbetween though: https://volkerkrause.eu/2024/09/14/kde-akademy-2024.html

2024-09-04 12:39:31 CEST

Here we go, on the way to Würzburg for #Qt Contributor Summit and #KDE #Akademy2024!

2024-08-31 09:59:10 CEST

Very much looking forward to #KDE #Akademy2024! I'll speak about KDE's CI/CD infrastructure together with Ben, @npub1c7k…xune and Julius as well as about the #OSM venue indoor maps in our conference companion app - https://volkerkrause.eu/2024/08/31/kde-getting-ready-for-akademy-2024.html

2024-08-11 13:32:42 CEST

Changed #KDE Itinerary to use a new API for Deutsche Bahn coach layouts after the previously used one disappeared. At least we got a small benefit out of that, quantities for vehicle features such as bike and wheelchair spaces.
https://cdn.masto.host/floss/media_attachments/files/112/943/162/182/358/193/original/8610c31255b01f80.png