Metadata for 3D models, presentation given by Sheena Bassett at the ArcheoLandscapes Conference in Romania in October 2014. The presentation describes the aims of the 3D ICONS project, the uses of metadata, the CARARE metadata schema, paradata and the requirements for metadata in the 3D ICONS project and for Europeana.

1. 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

2. 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

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

4. 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

5. 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.
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

6. 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.
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

7. 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).
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

8. CARARE2 Schema Building Blocks
Heritage Asset
Digital resources
A collectionActivities
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

9. 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.
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

10. 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).
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

11. 3D-ICONS example from Europeana
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

12. CISA Landing page
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

13. 3D model - Cottura di un Cinghiale
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

14. 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
Metadata for 3D Models Bucharest, 22nd-23rd October 2014
EDM
CARARE2

15. Metadata Editor
Mandatory** & recommended* fields
Minimum metadata necessary to
map to EDM.
Many more fields for in-house use.
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

16. 3D-ICONS Portal:
Geo-location metadata
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

17. 3D-ICONS Portal:
Metadata for Heritage Asset
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

18. 3D-ICONS Portal:
Metadata for Digital Resource
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

19. 3D-ICONS Portal:
Paradata
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

20. Examples from Polimi
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

21. Example from Athena RC:
Church of Panagia Acheiropiitos
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

22. Church of Panagia Acheiropiitos:
Metadata about digitisation
Metadata for 3D Models Bucharest, 22nd-23rd October 2014

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

24. Any questions?
Sheena.giess@gmail.com
http://3dicons-project.eu/
Metadata for 3D Models Bucharest, 22nd-23rd October 2014