Add release version and bounding box to downloaded GeoJSON filename

[Copilot]

Downloaded filenames only included type, zoom, lat, and lon — making it impossible to identify which Overture Maps release the data came from or the exact area covered without inspecting the file contents.

Changes

• components/nav/DownloadButton.jsx: Import getLatestReleaseVersion from stacService and fetch it concurrently with getDownloadCatalog via Promise.all (no latency cost — both share cached STAC data). Include the release ID and bounding box coordinates (truncated to 3 decimal places) in the filename.

New filename format

overture-{version}-{type}-{xmin},{ymin},{xmax},{ymax}.geojson
# e.g. overture-2025-01-22.0-buildings--122.419,37.774,-122.415,37.777.geojson

Original prompt

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This section details on the original issue you should resolve

<issue_title>Feature request: Add release metadata to saved filename.</issue_title>
<issue_description>Currently, saved filenames only include the zoom, latitude, and longitude to maintain uniqueness. A feature should be added to include certain release metadata to the filename, such as the version, to easily differentiate between different datasets.</issue_description>

Comments on the Issue (you are Copilot in this section)

• Fixes Feature request: Add release metadata to saved filename. #50

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[Jennings Anderson (jenningsanderson)]

Copilot Instead of the zoom/lat/lon, can we use the actual bounding box coordinates, truncated to 3 decimal places?

[github-actions]

🚀 Overture Maps explore-site branch preview deployed!

You can review your changes at https://staging.overturemaps.org/explore-site/pr/261/index.html

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_{♻️ Last refreshed: 2026-02-27T21:10:58Z}

[Copilot]

Copilot Instead of the zoom/lat/lon, can we use the actual bounding box coordinates, truncated to 3 decimal places?

Done in commit 2305456. The filename now uses the bounding box coordinates truncated to 3 decimal places instead of zoom/lat/lon:

overture-{version}-{type}-{xmin},{ymin},{xmax},{ymax}.geojson
# e.g. overture-2025-01-22.0-buildings--122.419,37.774,-122.415,37.777.geojson

[Jennings Anderson (jenningsanderson)]

🤖 Looks good to me :)