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Invitation Maps in the Crowd - Dutch Indies

The successful georeferencing project Maps in the Crowd closes on Thursday, November 17th with a festive event. This meeting will be held from 3.00-5.00 p.m. at the Vossius Hall (Leiden University Library, Witte Singel 27).

Over the last seven months a grand total of 7000 digitized maps of the Dutch Indies has been georeferenced by the general public. These maps belong to the Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV). Since July 2014 this heritage collection is part of the Leiden University Libraries.

For the project Maps in the Crowd a special application was developed, through which old maps could be matched (‘georeferenced’) with contemporary maps, such as Google Maps.


  • Welcome by project managers Patrick Gouw (Subject Librarian) and Martijn Storms (curator Special Collections for Maps and Atlases)
  • Key-note lecture by Frank Okker (biographer of G.P. Rouffaer): ‘Rouffaer speelt open kaart’
    Gerret Pieter Rouffaer was one of the last explorers of Indonesia and an important collector of maps for the KITLV
  • Panel discussion with the top-10 georeferencers and award ceremony
  • Drinks and visit to the pop-up exhibition of KITLV maps involved in the project

[Note: the entire program will be held in Dutch!]

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