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KAINUA 2017 - 21st of April, Bologna
OpenHistoryMapSilvia BernardoniMarco Montanari Raffaele Trojanis
KAINUA 2017 - 21st of April, Bologna
What is OHM Public/Participatory
Archaeology
Web GIS
Open Access«Best effort»
For the user by the user
KAINUA 2017 - 21st of April, Bologna
Assumptions
• Beyond the physical elements, everything else is interpretation
• Each interpretation is bound to a specific research
• Each research needs to be traceable
Starting from these assumptions, each discussion needs to be in part about the ontology and in part about the digitization, requiring the
differentiation of data from a physical and interpretative point of view
KAINUA 2017 - 21st of April, Bologna
The OHM approach
KAINUA 2017 - 21st of April, Bologna
Data digitization
Points and Lines vs Polygons
• Points• Lines
• Polygons
No physical evidence
Physical evidence
• Historical Data
• ArcheologicalData
KAINUA 2017 - 21st of April, Bologna
Data digitization
“Measure with micrometer,Mark with chalk,Cut with axe”• Jim Fuller
Coarse
details
Level 0
Level 1Detailed
world
KAINUA 2017 - 21st of April, Bologna
Data digitization
Marzabotto data as test for the system
KAINUA 2017 - 21st of April, Bologna
Data digitization
Low zoom level = less detail
• Polygons of buildings• Landuses• Natural environment• Roads and rivers (infrastructure)
KAINUA 2017 - 21st of April, Bologna
Data digitization
Medium zoom level = Medium detail
• Polygons of buildings• Landuses• Internal separations in buildings• Floors • Natural environment• Roads and rivers (infrastructure)
• Small local anthropic modifications
KAINUA 2017 - 21st of April, Bologna
Data digitization
Medium zoom level = Medium detail
• Polygons of buildings• Landuses• Internal separations in buildings• Floors • Natural environment• Roads and rivers (infrastructure)
• Small local anthropic modificationstype wall
hypothetical yes
type drain
hypothetical no
KAINUA 2017 - 21st of April, Bologna
Data digitization
Medium zoom level = High detail
• Polygons of buildings• Landuses• Internal separations in buildings• Floors • Natural environment• Roads and rivers (infrastructure)
• Small local anthropic modifications
KAINUA 2017 - 21st of April, Bologna
Data digitization
High zoom level = High detail
• Polygons of buildings• Internal separations in buildings• Floors • Roads and rivers (infrastructure)
• Small local anthropic modifications• Components of walls, monuments,
roads, infrastructures
KAINUA 2017 - 21st of April, Bologna
Data digitization
The fourth dimension
type research:time
valid:start -525
valid:end -475
source ardb.info/research/Govi201
0-42eeaf884
type research:time
valid:start -474
valid:end -450
source ardb.info/research/Govi201
0-42eeaf884
type research:time
valid:start -449
valid:end -400
source ardb.info/research/Govi201
0-42eeaf884
KAINUA 2017 - 21st of April, Bologna
Research Ontology
• The research is the tip of the iceberg• Each research is a collection set of interpretations• Each interpretation is a collection of physical elements and a set of shared
attributes• Each attribute defines a specific way of looking at the data
• The definition of Research Ontology implies• Source quality definition• Open Access enabling
KAINUA 2017 - 21st of April, Bologna
The source problem: Source Reliability
KAINUA 2017 - 21st of April, Bologna
Source Reliability
1 - Direct
•a Oral
•b Mnemonic
2 – Survey
3 – Archival
4 – Bibliographical
KAINUA 2017 - 21st of April, Bologna
Source Reliability
1 - Direct
•a Oral
•b Mnemonic
2 – Survey
•a Direct drawing
•b Instrumental mapping
3 – Archival
4 – Bibliographical
KAINUA 2017 - 21st of April, Bologna
Source Reliability
1 - Direct
•a Oral
•b Mnemonic
2 – Survey
•a Direct drawing
•b Instrumental mapping
3 – Archival
•a Catalogue
•b Digital archive
4 – Bibliographical
KAINUA 2017 - 21st of April, Bologna
Source Reliability
1 - Direct
•a Oral
•b Mnemonic
2 – Survey
•a Direct drawing
•b Instrumental mapping
3 – Archival
•a Catalogue
•b Digital archive
4 – Bibliographical
•a Educational
•b Academic
KAINUA 2017 - 21st of April, Bologna
Source Reliability
1 - Direct
•a Oral
•b Mnemonic
2 – Survey
•a Direct drawing
•b Instrumental mapping
3 – Archival
•a Catalogue
•b Digital archive
4 – Bibliographical
•a Educational
•b Academic
KAINUA 2017 - 21st of April, Bologna
The OHM Technology
KAINUA 2017 - 21st of April, Bologna
The Platform
• Based on the OpenStreetMap technological stack• Rails + PostGIS (+ LeafletJS)
• The OSM tools• Osmosis
• JOSM
• ID Editor *
• Mapnik *
• Overpass API
KAINUA 2017 - 21st of April, Bologna
Our additions to the stack• Tiler
• * ID Editor customization
• * Mapnik customization
• TimeTravelToolbar
• ARDb.info (Archaeological Research Database)• A point of view on the research ontology
• ASDb project
KAINUA 2017 - 21st of April, Bologna
Our additions to the stack - Tiler
• Tiler enables easy digitization of paper maps
• It exposes the characteristics of a specific map (zoom levels, resolution)
https://github.com/openhistorymap/tyler
KAINUA 2017 - 21st of April, Bologna
Our additions to the stack - T3
TimeTravelToolbar
• Integrates with LeafletJS
• Already Angular2 ready
• Adds time-based features to the classic Tile Server URLs by adding a time suffix to the filename.
• /{z}/{y}/{-x}.png tile url ⇒ /{z}/{y}/{-x}-{t}.png
KAINUA 2017 - 21st of April, Bologna
Our additions to the stack - ARDb
• Another point of view on the OHM Research Ontology• create an entrypoint and URI manager for the researches and • track the research ids source of the operations in OHM
• Enables a better interpretation of research information• Context• History• Relationships between research teams
KAINUA 2017 - 21st of April, Bologna
What else to say...
KAINUA 2017 - 21st of April, Bologna
What else to say...
You are all invited to join the OHMEMPIRE Community!
PAST
KAINUA 2017 - 21st of April, Bologna
Thank you!Silvia Bernardoni - [email protected]
Raffaele Trojanis - [email protected] Montanari - [email protected]