First version of the style: terrain, water, roads and per-course hole colors (#7)

[HuggeK]

Summary

Continues #7. Grows the style from 17 to 33 layers and adds 3D terrain:

• Per-course hole line colors — process.lua now precomputes a course_name_color attribute (FNV-1a hash of the course name → hue → #rrggbb) into golf_lines; the Hole lines layer consumes it with a #cccccc fallback.
• 3D terrain — new terrainSource (Mapterhorn raster-DEM) plus top-level terrain (exaggeration 1.5) and sky; the demo page now starts pitched at 70° with navigation and terrain controls.
• 16 new layers — facilities base fill, lakes, streams/rivers, waste areas, driving-range labels, numeric tee borders, hole info text (number/par/index/name/course), campsites (new other_areas source-layer), area:highway, parking lots, cartpaths, golf paths, highways, clubhouses, restaurants, buildings.
• Fixes the Out of bounds lines filter — it previously matched golf=hole instead of golf=out_of_bounds.
• Documents style/schema behaviors in styles/schema_and_style.md; broadens waterway handling in process.lua to any waterway=* tag.

Second round of fixes (2026-07-05)

Resolves all of the previously listed follow-ups plus three more schema/style mismatches found while auditing the style against process.lua:

• Labels can render at last — added top-level glyphs pointing at self-hosted Open Sans Regular glyph ranges on GitHub Pages. The font files themselves ship in companion PR Publish the style, samples and fonts to GitHub Pages on release #52 (merge this PR first, then Publish the style, samples and fonts to GitHub Pages on release #52).
• Streams and Rivers fixed — now reads source-layer: golf_lines, where process.lua actually writes waterway=* features.
• Area:highway fixed — now filters on area_highway, the attribute key actually written to the tiles (colon → underscore).
• River polygons render — the Lakes layer (renamed Lakes and rivers) now matches water=lake and water=river; process.lua emits both for natural=water.
• Hole numbers render — the hole text layer read ref, but the schema renames it to hole_number; "Hole N." now works.
• index.html hardening — maplibre-gl pinned to 5.24.0 (was floating latest) and the style is loaded relatively, so local testing serves the branch's own style instead of the deployed golftiles.org copy.
• All of the above documented in styles/schema_and_style.md.

Verification

• The style validates and loads cleanly in MapLibre GL JS 5.24.0 (headless-Chrome harness: style.load fired, zero error events — re-run after the second round of fixes).
• 11 scripted assertions pass: style JSON parses; glyphs template well-formed; every layer's source-layer exists in custom-tilemaker/config.json; the corrected filters (golf_lines waterways, area_highway, lake+river, hole_number, no ref reads); index.html fully pinned and loading the style relatively.

Deployment notes for golftiles.org (read before uploading)

• golftiles.org currently serves the old 17-layer style; upload styles/golfTilesStyle.json from this branch after merge to publish the improvements.
• Do not deploy the intermediate 8cb124f version of the style: its ["hsl", ["get", "course_name_hash_hue"], 70, 50] expression is invalid in MapLibre (hsl is not an expression), which fails validation of the whole style and blanks the map. The branch tip replaced it with the precomputed course_name_color.
• The published tileset (extract 260601) predates the process.lua change — its metadata has no course_name_color field — so hole lines will render the #cccccc fallback until the tiles are regenerated with the new process.lua.
• Labels appear only once PR Publish the style, samples and fonts to GitHub Pages on release #52 is merged and its Pages publishing runbook is completed (the glyphs URL points at the Pages-hosted fonts).

Known follow-ups (not blocking this PR)

• Regenerate and re-upload the sample tilesets with the new process.lua so course_name_color (and the broadened waterway=* handling) is actually present in the tiles.
• Release-triggered publishing of the style/samples/fonts to GitHub Pages is handled separately in Publish the style, samples and fonts to GitHub Pages on release #52.

🤖 Generated with Claude Code

[HuggeK]

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