Metadata for 3D models, Sheena Bassett

Metadata for 3D Models

Sheena Bassett, CISA Project Manager

This project has been funded with support from the European Commission‘s CIP ICT PSP programme

Background

3D-ICONS is supplying over 3,000 3D models of archaeological sites, buildings and monuments and related artefacts (from museums) to Europeana

Creating & providing metadata for: – Curation and preservation (real objects) – Further research and hypotheses – Supply to Europeana.

Providing Guidelines on digitisation, post-processing and user-friendly formats for viewing as well as metadata.

Metadata for 3D Models Bucharest, 22nd-23rd October 2014

Uses of metadata

Metadata can store information about the life cycle of a 3D object – Field: keeps track of instrument settings, the condition of

the physical object being scanned and the objectives of the project

– Lab: keeps track of post processing of the data and provides a record of how evidence has been interpreted

– Access: supports discovery and use of the objects for education, tourism, research (Europeana)

– Preservation: supports long term preservation and allows for re-use of the data.


CARARE metadata schema

CARARE metadata schema created for archaeological and architectural sectors.

Heritage Asset – The physical object

Who owns this, where it is, what period, contacts,…

Digital resource – 3D models, images, videos, texts, etc.

Description of the resource content, location, period, IPR, etc.

Based on existing schemas in use – CIDOC-CRM, LIDO. Adopted by a number of CARARE partners for use in

house during and after the project. Metadata for 3D Models Bucharest, 22nd-23rd October 2014

CARARE2 for 3D-ICONS

Reviewed for 3D models… – Improvements made based on CARARE project experience – Additions to accommodate 3D model needs – provenance and

paradata = CARARE2.

Provenance - covers the technical processes: – Equipment chosen and the instrument settings – Light sources – Any obstacles to digitisation or sources of noise/reflections – Software choices and settings – Techniques chosen for meshing, textures, decimation,

simplification, alignment etc.


Paradata

The principles are set out in the London Charter. Paradata provides information about the human

processes of understanding and interpreting: – The evidence used to interpret an object and to create a

reconstruction – The methodology used in a research project

Paradata enables alternative interpretations or hypotheses to be presented and linked to the supporting factual evidence.


3D-ICONS metadata requirements

3D-ICONS needed to establish a metadata schema to: support the provenance and paradata required

– for quality assurance of 3D models, – take on board the recommendations in CIDOC CRMdig; and to – Support delivery of metadata to Europeana data model (EDM).


CARARE2 Schema Building Blocks

Heritage Asset

Digital resources A collection Activities


Why is Europeana important?

Showcase of digital cultural heritage – Visibility for less well-known collections – Promote interest in CH, tourism

Hub for digital services vis API – Use metadata to develop apps to support museums and CH

sites (see Europeana Pro and Hackathons)

Research resource – Low-res 3D model for the public = sample for researcher.


Europeana Data Model (EDM)

EDM provides an open cross-domain framework that accommodates community standards

EDM is a semantic web approach that enables Linked Open Data.

EDM – distinguishes “provided objects” - painting, book, movie, etc.

(edm:providedCHO) from: – Digital representations of the object found online

(edm:webResource) and: – Groups these together to represent a logical whole

(ore:Aggregation).


3D-ICONS example from Europeana


CISA Landing page


3D model - Cottura di un Cinghiale


From A to B

Existing metadata repositories – Use existing metadata mapping MINT tool. Starting from scratch? – Metadata Editor to create the XML files. – Breaks the CARARE2 schema up into blocks – Once only info e.g. Organisation, Collection, Heritage Asset – Repeatable data e.g. Digital Resource, Activity,…

Ingest and transform using MoRE2 (repository). Other metadata MINT2 Metadata Editor

MoRE2 Europeana


EDM CARARE2

Metadata Editor

Mandatory** & recommended* fields

Minimum metadata necessary to

map to EDM.

Many more fields for in-house use.


3D-ICONS Portal: Geo-location metadata


3D-ICONS Portal: Metadata for Heritage Asset


3D-ICONS Portal: Metadata for Digital Resource


3D-ICONS Portal: Paradata


Examples from Polimi


Example from Athena RC: Church of Panagia Acheiropiitos


Church of Panagia Acheiropiitos: Metadata about digitisation


Conclusions

Recording good quality metadata is important! Benefits field researchers, visualisation professionals and

general users Paradata and provenance are important for use and

reuse of 3D models 3D ICONS has built on existing principles and schemas to

establish the CARARE 2.0 for 3D documentation and to supply data to Europeana

CARARE and 3D ICONS are helping confirm the relevance of richer data models for Europeana

Human supervision remains crucial for quality assurance!


Any questions?

[email protected]

http://3dicons-project.eu/


mailto:[email protected]

Metadata for 3D models, Sheena Bassett

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