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Barcelona - LIBER - OpenSource

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Barcelona - LIBER - OpenSource

  1. 1. Open source technologies for delivering historical maps online - case studies at the National Library of Scotland Background and context NLS Case Studies 1 - GDAL/MapTiler/Georeferencer NLS Case Studies 2 - Geoserver /OpenLayers Other technologies - IIPImage forJP2 / Omeka.org Opportunities for libraries Chris Fleet, National Librry of Scotland, and Petr Pridal, Klokan Technologies, GmbH
  2. 2. Maps of Scotland website – 44,000 online mapshttp://maps.nls.uk http://geo.nls.uk
  3. 3. Open source technologies for delivering historical maps online - case studies at the National Library of Scotland Background and context NLS Case Studies 1 - GDAL/MapTiler/Georeferencer NLS Case Studies 2 - Geoserver /OpenLayers Other technologies - IIPImage forJP2 / Omeka.org Opportunities for libraries
  4. 4. New MrSID OpenLayers Viewer - 2009 LizardTech Express Viewer problems: • Fixed image extents on screen • Non-Ajax based viewing • Limited ability to display image in wrapper • Printing and downloading limitations • No Permalink New customised OpenLayersviewer addresses these problems and uses other open-source Javascript programs including, Protoype, Gears, and XML HttpRequest
  5. 5. GDAL / OGR open source commandsgdalinfo information about raster imagegdaltindex create shapefile of raster image extentsgdal_translate convert raster images between formatsgdaltransform convert raster images between projectionsogrinfo information about vector fileogr2ogr convert vector files between formats
  6. 6. GDAL: using gdaltindex to create a clickable graphic index
  7. 7. Using QGIS to create and edit shapefiles
  8. 8. Visualising Urban Geographies - guides to georeferencing workflows using open-source QGIS and MapTiler geo.nls.uk/urbhist/guides.html
  9. 9. Using GDAL ogr2ogr - to convert shapefiles (in British National Grid) into KML (in WGS84) for Google Earth
  10. 10. NLS Map Georeferencer
  11. 11. NLS Map Georeferencer
  12. 12. NLS Map Georeferencer – selecting a map
  13. 13. NLS Map Georeferencer – split-screen for georeferencing
  14. 14. NLS Map Georeferencer – adding control points
  15. 15. NLS Map Georeferencer – saving…
  16. 16. NLS Map Georeferencer – viewing results in Google Earth browser plugin
  17. 17. Tools: MapTiler and Tileserverhttp://www.maptiler.org/ http://www.tileserver.com/
  18. 18. MapTiler – Tile Map Service mosaics
  19. 19. MapTiler – Tile Map Service mosaics
  20. 20. MapTiler – Tile Map Service mosaics
  21. 21. MapTiler – Tile Map Service mosaics
  22. 22. Open source technologies for delivering historical maps online - case studies at the National Library of Scotland Background and context NLS Case Studies 1 - GDAL/MapTiler/Georeferencer NLS Case Studies 2 - Geoserver /OpenLayers Other technologies - IIPImage forJP2 / Omeka.org Opportunities for libraries
  23. 23. ESRI ArcIMS applications – 2004-2011
  24. 24. ESRI ArcIMS applications – 2004-2011
  25. 25. ESRI ArcIMS applications – 2004-2011
  26. 26. ESRI ArcIMS applications – 2004-2011
  27. 27. Problems of ArcIMS• Expense – annual licensing costs of ca £5,000 - £6,000• Limited web-mapping functionality• Instability – difficulty in handling high usage spikes• Fixed screen for map interface (500 x 500 px)• Basis on British National Grid rather than Spherical Mercator
  28. 28. GeoServer – adding shapefiles as layers
  29. 29. GeoServer – previewing shapefiles and fields
  30. 30. GeoWebCache – for rapid display
  31. 31. GeoServer / OpenLayers Sheet Viewer
  32. 32. GeoServer / OpenLayers Sheet Viewer
  33. 33. GeoServer / OpenLayers Sheet Viewer
  34. 34. GeoServer / OpenLayers Sheet Viewer
  35. 35. OpenLayers MrSID Viewer
  36. 36. GeoServer / OpenLayers Sheet Viewer
  37. 37. GeoServer / OpenLayers Mosaic Viewer
  38. 38. GeoServer / OpenLayers Mosaic Viewer
  39. 39. GeoServer / OpenLayers Mosaic Viewer
  40. 40. GeoServer / OpenLayers Mosaic Viewer
  41. 41. GeoServer / OpenLayers Mosaic Viewer
  42. 42. ConclusionsAdvantages of open-source software:• cheaper, more open standards-compliant• delegated development and customisation• greater opportunities for collaboration• improvements in functionality and aesthetics of applicationsDisdvantages of open-source software:• greater need for programming knowledge• fewer bespoke applications, and more need for development• more time-consuming to develop and support• possible need for paying for external development

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