The GeoDataHub (GDH) cartographic digitisation programme is now in its fifth year of operation. Approximately 16,000 historic New Zealand government maps have been scanned and are on schedule to be made publicly available within the upcoming year. Since the launch of its pilot project in 2010, the GDH has been an on-going endeavour to find the most effective equipment, tools, and methods to produce the highest quality archival products that will stand the test of time.

Critical to the success of the GDH has been the use of large-format contact scanners. The GDH programme has utilised five different scanner models from three leading manufacturers: Contex, KIP, and ColorTrac. These scanners include a mix of the industry standard sensor technologies (CCD and CIS), and each brand requires its own proprietary software to operate. All models used have produced products that meet archival standards, but with extended experience they have also presented drawbacks and challenges that required mitigation for the programme to succeed.

This paper provides an overview of the scanning equipment used by the GDH, with a focus on the pros and cons of each type of scanner and its suitability to the programme’s needs. The GHD team has, by necessity, developed a deep understanding of equipment capabilities and limitations. This understanding allows for keen assessment of the key components required, both now and in the future, for the successful digitisation of cartographic heritage materials.