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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