Case study

Murmelbahn: decoding GraviTrax course files

Murmelbahn decodes GraviTrax course data obtained through the Ravensburger app API and presents course details and bills of materials in a web app. The author used ImHex to work out changing file formats and includes a schema and parser for recent course versions.

Targets: App
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-08

Stars: 8
Last commit: 2026-06-25
Language: Rust
License (GitHub): Apache-2.0

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: The documented build uses Rust, a frontend npm build, and a PostgreSQL DATABASE_URL.
Limits: Course parsing covers the latest three format generations, dating from after 2020.
License: Apache-2.0.

Cite

BibTeX

@misc{murmelbahn-case,
  title = {{Murmelbahn: decoding GraviTrax course files}},
  howpublished = {\url{https://github.com/lfrancke/murmelbahn}},
  url = {https://github.com/lfrancke/murmelbahn},
  urldate = {2026-11-08},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/murmelbahn-case/}}
}

Plain text

Murmelbahn: decoding GraviTrax course files. https://github.com/lfrancke/murmelbahn (accessed 2026-11-08). Awesome REA entry: https://awesomerea.org/resources/murmelbahn-case/

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Primary sources

README.md GitHub · lfrancke/murmelbahn · Revision 8d7974a
CHANGELOG.md GitHub · lfrancke/murmelbahn · Revision 8d7974a