[BUG] Fix "STAC viewer" links pointing to raw catalog JSON

[John McCall (lowlydba)]

https://stac.overturemaps.org/ returns the raw Catalog JSON, not a browsable UI. Fixes #460.

The three "STAC viewer" links (cloud-sources.mdx x2, quick-start.mdx) now point at a hosted stac-browser instance (https://browser.moregeo.it/external/stac.overturemaps.org/catalog.json) instead.

Also dropped the MapLibre demo on the build-a-map page (src/components/map.js + layers.js). It fetched PMTiles from a stale CloudFront URL (d3c1b7bog2u1nn.cloudfront.net/examples/*.pmtiles) that no longer serves those tiles, so the embed was broken. Rewiring it to tiles.overturemaps.org would also require rewriting layers.js's style rules against the real tile schema (source-layer, @name vs name, division subtypes replacing the old locality_type/localityType/subclass fields that don't exist in current tiles), which is more surface area than this page needs.

The buildings-map.js component on other pages is unaffected: it already builds its style rules against tiles.overturemaps.org and the current schema.

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🗺️ OMF Docs previews are live!

🆕 Auto-gen schema site (beta)	https://staging.overturemaps.org/docs/pr/481/index.html
🗂️ Auto-gen schema ref	main@bd85f08
🌍 Repo schema site	https://staging.overturemaps.org/docs/pr/481-no-autogen/index.html
🕐 Updated	Aug 12, 2026 21:00 UTC
📝 Commit	89a17f9

Auto-gen schema site is now available. This is an early preview of a future workflow where we will automatically generate and publish reference docs for the Overture Maps Format schema.

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[Copilot]

Pull request overview

Updates the documentation to fix misleading “STAC viewer” links that currently land users on raw catalog JSON, and removes a broken MapLibre demo that relied on stale tile URLs.

Changes:

• Repoints “STAC viewer” doc links to a hosted stac-browser instance for browsing stac.overturemaps.org/catalog.json.
• Removes the MapLibre/PMTiles embedded demo and associated style JSON tabs from the “build-a-map” example page.
• Deletes the now-unused React MapLibre demo implementation (map.js) and its style definitions (layers.js).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/components/map.js	Deletes the embedded MapLibre demo component that referenced stale PMTiles URLs.
src/components/layers.js	Deletes the MapLibre style-layer definitions used only by the removed demo.
docs/getting-data/quick-start.mdx	Updates the “STAC viewer” link to point to stac-browser.
docs/getting-data/cloud-sources.mdx	Updates both “STAC viewer” references to point to stac-browser.
docs/examples/build-a-map.mdx	Removes the embedded demo map and the style tabs; updates surrounding copy accordingly.

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[Dana Bauer (danabauer)]

Thanks for doing this, John!