CARARE 2.0: a metadata schema for 3D documentation

CARARE 2.0: a metadata schema for 3D documentation

Andrea d’Andrea, Università degli Studi di Napoli L'Orientale

Kate Fernie, MDR Partners, UK

Digital Heritage 2013, Marseilles, 28 October 2013


Introduction The 3D-Icons Project Metadata issues Developing a metadata schema for 3D documentation Provenance and paradata EDM and CARARECARARE 2.0

Conclusions


The 3D-ICONS Project

3D-ICONS is a 3D digitisation project funded by the EC’s CIP-ICT PSP programme16 partners in 11 countriesDigitising world heritage sites and archaeological objectsEstablishing a pipeline for capture, processing and publishing of 3D content online –in user friendly formats–with metadata–For Europeana


Metadata and 3D contentScientific data cannot be used correctly without information about what it means, how it was created and in which conditionsRelevant to 3D given the range of–Instruments, methods and techniques

–used in both data capture and data processing, and

–the different motivations and rationales for 3D reconstructions Pompeii, Italy


Benefits of MetadataMetadata 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

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


Metadata: some context

The London Charter– Established principles for computer visualisation

CIDOC CRMdig – allows a simple and clear description of the processes carried out to digitize and render a 3D model (3D COFORM)

CARARE – A harvesting schema for the archaeological and architectural heritage supporting delivery of content to EuropeanaPisa


ProvenanceIn 3D digitisation of cultural heritage objects provenance covers the technical processes whether this is:– 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.


ParadataProvides 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 interpetations or hypothesis to be presented and linked to the supporting factual evidence

The principles are set out in the London Charter


3D ICONS approach

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

Europeana.eu: Europe’s cultural heritage

portalText

Image

Video

Sound

3D

Europeana’s aggregation network

Museums

National Aggregators

Regional Aggregators

Archives

Thematic collections

Libraries

29M objects from 2,200 European galleries, museums, archives and libraries

CARARE3D ICONS

Europeana Data Model

EDM example

Provides an open cross-domain framework that accommodates community standardsIs a semantic web approach that enables Linked Open Data


CARARE 3 year project (2010-2013) Network of heritage organisations, archaeological museums, research institutions and specialist archives 29 partners in 21 countries

Delivering content to Europeana Established an aggregation services and good practices for content relating to archaeological monuments and historic sites including: Metadata schema (CARARE 1.00 Mapping from CARARE to EDM schema

http://www.carare.eu


CARARE Content– Images, text, videos, 3D models…

CARARE Metadata Schema

Heritage asset

Digital resources

Activities

Collection

4 themes

http://www.carare.eu/eng/Resources/CARARE-Documentation

Conceptually the CARARE record is focussed on a heritage asset and its relations to digital resources, activities and to collection information

CARARE and EDM

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)

Provided Cultural Heritage Object (CHO) and descriptive

metadata

Web Resources – digital representations

Aggregations – Bundling it all together

CARARE contentCARARE content includes:•Heritage assets (monuments, buildings, landscapes and other real world objects) described in textual metadata with relations to places, events, thumbnails and other digital objects.•Real world cultural objects (such as historic drawings and photographs, publications, archive materials) which provide sources of information about the heritage asset.•Born-digital resources related to these objects, such as 3D models.Case study: http://pro.europeana.eu/carare-edm

Mapping CARARE data to EDM

A CARARE object becomes one or several EDM Provided Cultural Heritage Objects with:Related web resourcesAggregationsContextual information about

place

Creating EDM resources from

CARARE data

edm:ProvidedCHO HA:PamFond/1978155

ore:Aggregationhttp://

store.carare.eu/uid/iid:1655549/HA:PamFond/1978155

Heritage Asset’s

identifierPamFond/1978155

CARARE’s Heritage Assets always give raise to one EDM ProvidedCHOs with its companion Aggregation

Contextual Resources – e.g., Places

CARARE’s geospatial enrichment represented with EDM contextual resource class


3D ICONS and CARARE 2.0

CARARE experience & 3D ICONS

CARARE provided better metadata to Europeana for 2M objectsIn the process– We identified some issues with the content being provided, the data model and found solutions in the mapping to EDM

– This suggested an update to CARARE’s schema

3D ICONS project identified the need to add paradata and provenance


CARARE 2.0Provides an update to the CARARE schema– Adds properties and elements to ensure compliance with 3D ICONS requirements

Extends the activities theme– Allows for different types of events (such as data acquisition, post processing)

– Adds an element to capture event methods– Allows for the general and specific purposes of events to be distinguished

– Allows for methods and techniques to be distinguished better

– Adds relations between events to conform with CRMdig


CARARE 2.0 continued

Redefines the scope of the heritage asset class to include a wider range of cultural objects:– The class was limited to monuments, buildings, landscapes, archaeological objects, ecofacts and shipwrecks

– The scope now includes information sources such as books, journal articles, maps, plans, drawings, photographs, movies and other born digital cultural objects such as 3D models

– General type element added to distinguish real world monuments from other cultural objects

The digital resources theme was simplified to remove duplicationThis simplifies the mapping to EDM


Conclusions

Recording good quality metadata is important! Its beneficial for field researchers, visualisation professionals and general users

Paradata and provenance are important for use and re-use 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?Andrea D'Andrea [email protected]

Kate Fernie [email protected]

http://www.3dicons-project.eu

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

CARARE 2.0: a metadata schema for 3D documentation

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