Web-Annotation on Digital Archive Systems Tech Bloghttps://tech.ldas.jp/en/tags/web-annotation/Recent content in Web-Annotation on Digital Archive Systems Tech BlogHugoenThu, 07 May 2026 08:30:00 +0900Aligning IIIF 3D Viewer with Presentation API 4 — converting legacy manifests at runtimehttps://tech.ldas.jp/en/posts/iiif-3d-viewer-presentation-api-4-converter/Thu, 07 May 2026 08:30:00 +0900https://tech.ldas.jp/en/posts/iiif-3d-viewer-presentation-api-4-converter/<blockquote> <p>This article was co-written with a generative AI. I cross-checked the facts against primary sources where I could, but errors may remain. Please consult the primary sources before relying on it for important decisions.</p></blockquote> <h1 id="what-i-did">What I did</h1> <p><a href="https://github.com/nakamura196/iiif-3d-viewer">IIIF 3D Viewer</a> is a Next.js app for viewing glTF/GLB 3D models and their annotations as delivered by IIIF Manifests. Until now it ran on IIIF Presentation API 3.0 manifests with a project-local extension — a custom <code>3DSelector</code> for points / polygons and a <code>camPos</code> field on the selector for the recommended camera state.</p>