petr Žabička: crowdsourcin old maps
TRANSCRIPT
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TEMAP Project – Crowdsourcing Old Maps
Petr Žabička Moravian Library in Brno
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• TEMAP project • Access • Search
• Georeferencing • Future work
Agenda
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TEMAP Project • TEchnology for access to Czech MAP Collections
• MZK, Charles Uni (CU), Masaryk Uni (MU) TEMAP results: • Georeferencer and Georeferencer based workflows (MZK) • Detection of cartographic projection from a scanned map (CU) • Tool for map series cataloguing (IIIrd military mapping) (MU) • Testing tools for duplicate/similar map image detection (MZK) • Map cataloguing guides and online courses (UK) • Cataloguing and digitisation of map collections (4 globes, 50000
maps) • Improvement of geoname search tools
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Help to put old map collections online
Why?
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• Online publishing of high resolution scans of old maps • Intuitive search based on time and location
• availability of geographical coordinates of the map
edges • Map comparison
• availability of geographical coordinates of selected points on the digitized map
Aims
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MZK has long been involved with old maps: • Digitisation and online publishing of its map collection
• http://mapy.mzk.cz/ • Use or development of free and open source tools for
• modification and publishing of large images
• placing old maps on a contemporary world map • map search
• Projects: Historical Collections of MZK, Old Maps Online, EuropeanaTravel, TEMAP, ...
Old Maps in MZK
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Image resolution: 300+ dpi • Nip2 image processing software • Image tiles
• Large number of tiles => jpeg2000 and IIPImage • Tile based map viewing => Zoomify + OpenLayers
• Digital library => Kramerius + metadata editor
Publishing
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NIP2/VIPS image processing: • Halfway between excel and Photoshop • Works with TIFF
• Modification and stitching of very large images • Freely avalilable, can process images larger than the
amount of available memory in a PC JPEG2000 conversion (using Kakadu software library) • Jpeg2000 creation recommentdations
• Quality layers, zoom levels etc.
Publishing
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• Added JPEG2000 support using Kakadu library • JPEG2000 created with inappropriately chosen parameters
will result in a very slow map display! • Memcached tile cache
• Optional watermarking support
• Tileset standards: IIP, DeepZoom (MZK), Zoomify (MZK), IIIF (ÖNB)
• MZK publishes installation packages for Debian Linux and a Windows installer
http://help.oldmapsonline.org/jpeg2000/windows/
MZK and IIPImage
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• IIPImage generates tiles of all four supported standards • Many different tile viewers can be used with the same
image server (Java, Flash or Javascript based)
• OpenLayers preferred for maps • Currently using modified version 2
• Version 3 (now in beta) adds native Zoomify support • Other viewers can use DeepZoom or IIIF tile structures
(Seadragon/SandDragon)
Tile Viewing
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• Kramerius 4 can work with IIPImage • DeepZoom or OpenLayers viewer • Page thumbnails can be created by IIPImage on the fly
• Metadata editor for Fedora Commons repository • code.google.com/p/meta-editor
Kramerius is not mandatory for the other tools mentioned in this presentation
Digital Library
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• Full text search fails on maps • Geographic names change in time, spelling varies • Different institutions create different quality of metadata
• How to account for the scale of a map in search?
⇒ Maps can best be searched for on a map!
Search
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• Search system requirements: • Support for geographical relevance ranking • Scalability (user numbers, map index)
• Speed (immediate response to change of search parameters)
• Data requirements: • Geographic bounding box coordinates • Scale of a map or its size & DPI
• Year of publication, year/era shown on a map
Search
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• JISC Project • Indexes many online map collections worldwide • Based on MapRank Search technology
• (http://www.mapranksearch.com) • Project started in February 2012 with 6 collections
• 30000 visits per day when announced
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• Open for new map collections (for free) • All rights remain with the collection owners
Requirements: • Online zoomable maps in high resolution
• Permanent URL and free access • Basic description of the maps in Dublin Core including a
bounding box data
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• While cataloguing: BoundingBox tool
• Online published maps:
Georeferencer
Bounding Box
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http://boundingbox.klokantech.com
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• Enriches metadata of scanned maps • Runs in a web browser • Intuitive
• Crowdsourcing friendly – wiki-like • Shows 2D and 3D map overlays
• analyses map accuracy, calculates a bounding box • Successful pilots in several institions:
Georeferencer
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Pilot of 9 institions under the TEMAP project: • Moravian Library in Brno • Charles University in Prague • Masaryk University • National Library of the Czech Republic • Museum of West Bohemia in Pilsen • University of Jan Evangelista Purkyně • Research Library in Olomouc • Research Library in České Budějovice • National Technical Library
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• Pilot start 21st March 2013 • Motivating users - competition • Institutions supplied csv files with metadata and
their logos • Metadata created by the users are available to
enrich the map presentations in the individual institutions
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Project status after new map import today
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• Over 17000 users • Over 260000 control points • Highest number of points on a map: 581 (minimum
required: 5) • Most active user: over 30800 points (11,5%)
• Most work done right after pilot announcement by the media
• Some images were not maps (text, veduta)
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Challenges...
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http://hermes.mzk.cz/map-transformation/
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New requirements: • Mark map as impossible to georeference
• What about border cases?
• Map rotation (OpenLayers 3 working prototype) • Using another old map for georeferencing
• Mandatory crop lines
• Quality control interface
• Several maps on one sheet
• Reference map with a prominent river network • Overlay improvement – map warping in a browser
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WWW.STAREMAPY.CZ
WWW.TEMAP.CZ