de Cuyper, J.-P. ; Winter, L.

published in Astronomical Data Analysis Software and Systems XV, 351, pp. 587 (2006)

Abstract: The D4A (Digital Access to Aerial- and Astro-photographic Archives) project aims to acquire the necessary know-how, hardware and software to digitise the astro-photographic collections of the Royal Observatory of Belgium (ROB) and the aerial-photographic collections of the National Geographic Institute and the Royal Museum of Central Africa in collaboration with AGFA-Gevaert, a world-leader in photographic matters. The final design of the ``D4A Digitiser'' that is being built by the ROB in Brussels is presented. A geometric benchmark testing of different commercial flatbed scanners is given and the results are compared with the requirements needed for the astrometric and photometric data extraction from the digitised images.

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