mikkeli
28665b4279
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013kj58Jugkic783b8ZrtTVZ
22 lines
809 B
Markdown
22 lines
809 B
Markdown
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type: default
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---
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# Map minting guidelines
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## 1. Artifacts are never committed
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- Routing tiles and basemaps are large binaries rebuilt from upstream. This repo
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holds the scripts that produce them and a report of the procedure, nothing else.
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- Every build records the source PBF's date. An artifact whose provenance is
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unknown is an artifact to rebuild.
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## 2. Build the admin database first
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- `valhalla_build_admins` is what determines driving side, and it is a separate
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step *before* the tile build.
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- Skip it and Valhalla routes and narrates as though Japan drove on the right.
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## 3. Tiles ship as a directory, not a tar
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- Once for RAM on an 8 GB board, once because `rsync` deltas a tree of changed
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files where a multi-gigabyte tar forces a full checksum at both ends.
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## 4. To be added
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