Upload reality capture data and tile it into 3D Tiles via the Cesium ion REST API
domain: cesium.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Create a Cesium ion access token with assets:read, assets:write, and assets:list scopes
POST to /v1/assets with name, description, type (3DTILES/IMAGERY/TERRAIN), and options (e.g., sourceType, clampToTerrain) describing your data
Upload your source files to the temporary Amazon S3 location returned in uploadLocation, using the provided short-lived credentials
POST to the onComplete.url returned in the initial response to signal upload is finished and tiling should begin
Poll GET /v1/assets/{assetId} until status becomes COMPLETE, watching percentComplete for progress
Stream the tiled asset into a Cesium-based viewer or export it once complete
Known gotchas
Upload credentials in uploadLocation expire after about an hour — don't cache and reuse them across long-running jobs
assets:write scoped tokens can create, modify, and delete assets in the account, so treat them as sensitive and scope narrowly
Tiling can fail with DATA_ERROR (bad source data) vs a generic ERROR (pipeline issue) — branch handling on status rather than treating all failures the same
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