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Drayton Manor: real walking areas on the map - #10

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roxburghm merged 1 commit into
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walking-outlines-valhalla
Nov 13, 2026
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roxburghm merged 1 commit into
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walking-outlines-valhalla

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The map drew a circle for Drayton Manor because no walking outlines had ever been built. The Walking distance data job failed every time: GraphHopper refuses isochrone requests on the current plan (Too big time_limit for Isochrone API: 1680, allowed: 0. Upgrade your subscription).

  • scripts/walking-bands.mjs now gets isochrones from the public Valhalla server run by FOSSGIS. It uses OpenStreetMap data and needs no key. GraphHopper is still available with --provider graphhopper for a plan that includes isochrones.
  • Generated public/data/walk/drayton-manor.json: 35 bands at 100 m steps out to 3.5 km, plus one outline per year at that year's cut-off.
  • The workflow no longer needs GRAPHHOPPER_API_KEY. README updated.

The walk from a visitor's home still comes from Google Maps. The outlines decide what's drawn on the map, and they are the fallback if Google can't route.

🤖 Generated with Claude Code

The walking-data job has never produced anything: GraphHopper's Isochrone API
isn't included in the key's plan ("allowed: 0"), so the map fell back to a
circle. Build the outlines from the public Valhalla server (OpenStreetMap, no
key) instead, keeping GraphHopper as --provider graphhopper, and commit
Drayton Manor's bands and yearly cut-off outlines.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Azure Static Web Apps: Your stage site is ready! Visit it here: https://polite-forest-0ca6e1603-10.westeurope.3.azurestaticapps.net

@roxburghm
roxburghm merged commit ca83b1e into main Nov 13, 2026
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