Petr Žabička: Crowdsourcin old maps

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Petr Žabička: Crowdsourcin old maps

  1. 1. TEMAP Project – Crowdsourcing Old Maps Petr Žabička Moravian Library in Brno
  2. 2. Agenda •  TEMAP project •  Access •  Search •  Georeferencing •  Future work
  3. 3. 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
  4. 4. Why? Help to put old map collections online
  5. 5. Aims •  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
  6. 6. Old Maps in MZK 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, ...
  7. 7. Publishing 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
  8. 8. Publishing 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.
  9. 9. MZK and IIPImage •  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/
  10. 10. Tile Viewing •  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)
  11. 11. Digital Library •  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
  12. 12. Search •  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!
  13. 13. Search •  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
  14. 14. •  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
  15. 15. •  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
  16. 16. Bounding Box •  While cataloguing: BoundingBox tool •  Online published maps: Georeferencer
  17. 17. http://boundingbox.klokantech.com
  18. 18. Georeferencer •  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:
  19. 19. 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
  20. 20. •  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
  21. 21. Project status after new map import today
  22. 22. •  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)
  23. 23. Challenges...
  24. 24. http://hermes.mzk.cz/map-transformation/
  25. 25. 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
  26. 26. WWW.STAREMAPY.CZ WWW.TEMAP.CZ

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