Crowdsourced Georeferencing for Map Library Collections / Chris Fleet, Senior Map Curator, National...
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Transcript of Crowdsourced Georeferencing for Map Library Collections / Chris Fleet, Senior Map Curator, National...
Crowdsourced georeferencing for Map Library Collections
Chris Fleet, Senior Map Curator, National Library of Scotland
CIGS Metadata & Web 2.0 Seminar, 21 June 2013
1. Advantages of georeferencing maps for libraries
2. Review of other approaches for crowdsourced
georeferencing
3. Georeferencer application in NLS and BL
4. Key success factors
5. Future developments
Crowdsourced georeferencing for Map Library Collections
Georeferencing workflow
Why georeference maps?
1. To visualise maps in new or better ways
2. To improve access to and retrieval of maps
3. To allow new ways of understanding the content of early
maps
4. To allow maps to be integrated with other spatial
information
5. To allow maps to be compared more easily to each other
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
1. To visualise maps in new or better ways
2. To improve access to and retrieval of maps
2. To improve access to and retrieval of maps
2. To improve access to and retrieval of maps
2. To improve access to and retrieval of maps
2. To improve access to and retrieval of maps
Map Images viewer
2. NLS OS 25 inch sheet boundaries in ScotlandsPlaces
2. NLS map sheet boundaries in OldMapsOnline
eg. Geo-referencing for understanding the content of early portolan charts
3. To allow new ways of understanding the content of early
maps
4. To allow maps to be integrated with other spatial
information
eg. height – walled city of Beirut from 18th century
4. To allow maps to be integrated with other spatial
information
eg. property ownership
5. To allow maps to be compared more easily to each other
Online versions at:
digital.nls.uk/bartholomew
Other approaches – QUAD-G
http://www.geography.wisc.edu/research/projects/quad-g/
Other approaches: NYPL Map Warper
http://maps.nypl.org/warper/
Other approaches: eHarta
http://earth.unibuc.ro/articole/eHarta?lang=en
NLS Georeferencer – projects page
http://maps.nls.uk/projects/georeferencer/
NLS Georeferencer – crowdsourced georeferencing
NLS Georeferencer – Georeferencer window
NLS Georeferencer – Georeferencer window
NLS Georeferencer – Georeferencer window
NLS Georeferencer – Visualise window
NLS Georeferencer – Accuracy window
NLS Georeferencer – Control Points in Google fusion table
Georeferenced metadata – MARC extents and GeoTIFF header info
Paris, France E 2°13'27"-E 2°28'11"/N 48°54'07"-N 48°48'56"
Format for MARC Aleph 034: $$dE0021327$$eE0022811$$fN0485407$$gN0484856255: $$cE 2°13'27"-E 2°28'11"/N 48°54'07"-N 48°48'56"
Driver: GTiff/GeoTIFFFiles: 100741793.tifSize is 10642, 8892Coordinate System is: PROJCS["OSGB_1936_British_National_Grid", GEOGCS["GCS_OSGB 1936",…Origin = (453544.409153918500000,145329.490622364830000)Pixel Size = (0.636277533843237,-0.636277533843237)Metadata:Corner Coordinates:Upper Left ( 453544.409, 145329.491) ( 1d14'0.54"W, 51d12'14.93"N)Lower Left ( 453544.409, 139671.711) ( 1d14'3.57"W, 51d 9'11.77"N)…
NLS Georeferencer - results
1,000 early maps of Scotland - released November 2010
half of the maps were georeferenced in the first 16 months, some categories of maps, such as town plans, completely georeferenced in this time
But...
problems with the registration and login problems with map image display passive promotion
2011 developments
improved design and professional instructional video simpler registration and user logging statistics and visualisation tools supporting competition in crowdsourcing
BL Georeferencer – Georeference window
BL Georeferencer – Visualise window
BL Georeferencer – Visualise window
BL Georeferencer – Feb 2012 results: “Round One”
• 725 maps assigned spatial
metadata
• Completed in less than one week
• Publicity minimal – social media
*key*
• ~90 participants
• Top five completed half the work
• Data quality good: <3% had errors
>.005
Content relevant
Accessibility and convenience of application
Activity engaging
Immediate results and feedback
Competitive crowdsourcing tools
Recognition and visible overall contribution
Asking the top five contributors
BL Georeferencer – What made it work ?
BL Georeferencer – top georeferencers
44
BL Georeferencer – Competitive widgets
ICC Georeferencer – top contributors’ widgets
Georeferencer: Future Developments
Adopt personalisation and localisation tools, including a "My Maps" option, the ability to upload custom scans by individuals, and the translation of the web interface into other European languages beyond English.
Include better georeferencing options
Add better support for multi-sheet maps and map series.
Implement WMS / WMTS services - for georeferenced maps, allowing their presentation in a browser without requiring a Google Earth browser plugin, as well as in other web-mapping applications.
Allow annotations of georeferenced maps by users and so exploiting the advantages of semantic links and extraction of textual content (including place names) from the maps themselves.
Crowdsourcing Placenames: Wales1900Cymru Zooniverse Project
http://www.cymru1900wales.org/
Thank you
NLS Georeferencer: http://maps.nls.uk/projects/georeferencer/
Fleet, Kowal & Pridal, “Georeferencer: Crowdsourced Georeferencing for Map Library Collections”,
D-Lib Magazine 18(11/12), November/December 2012http://www.dlib.org/dlib/november12/fleet/11fleet.html