The ideas and findings in this report should not be construed as an official DoD position. It is published in the interest of scientific and technical information exchange.

Summary The invasive plant species, Tradescantia fluminensis, first appeared in the Whakapohai Reserve in South Westland, New Zealand, during the 1960s, and by 2002, it had spread throughout the 43‐ha riparian reserve. It was presumed at high risk of spreading to neighbouring National Parks because of its ability to spread by floodwaters. A restoration project with the aim of eradicating Tradescantia in the reserve began in May 2002, at which time eight transects were established. The cover of Tradescantia was measured before control, and after on six subsequent occasions. The initial cover of Tradescantia was estimated to be about 17% of the entire reserve in 2002 and declined with annual control to <0.1% in 2011. The effects of this management regime on the forest community are described along with documentation of the costs and time put into achieving these outcomes.

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Online map interfaces and GIS software are means of accessing and visualizing archival holdings associated strongly with places. This article investigates the possibility of an interest among at least some archivists and historians in finding records based on place names and maps. A review of recent tools and case studies on map-based methods of seeking and visualizing information in archives and special collections provides a current overview. A 2015 survey gathered additional information from archivists as to whether they place a high priority on, and are comfortable with, map-based methods, as well as to what extent their patron groups might benefit from such methods. A subsequent 2018 survey of historians provided evidence that this major patron group of archives would benefit from map-based methods of discovery, although the survey indicated that they are focused on GIS software, not simple visualization tools, in their own work. The literature and survey data validate the premise that many archives patrons are interested in exploring this area, but that the difference between archivists’ and historians’ technical knowledge and interests is a significant obstacle.

This paper is a case study of the ongoing transformation of the London Free Press Collection of Photographic Negatives from a physical archive to a digital one. This Collection is a typical medium-sized newspaper photographic negative morgue dating between 1938 and 1992. These morgues possess enormous value as visual evidence of the development of communities, and society in general. The London Free Press serves a market of around a million people in Southwestern Ontario, Canada. The Collection’s current custodian, the University of Western Ontario Archives and Special Collections, is in the process of transforming it from a purely physical entity to a digital resource of great research potential. To place the case study in a broader context, the author reviews some of the recent literature on the topic of newspaper photograph morgues. He then delves into a detailed description of the custodial history of the Collection as well as details about current collection management issues, including metadata and digitization. The author concludes that the digitized body of tens of thousands of unique images will be more than enough to satisfy many visual researchers and could form part of a North American digital photojournalism archive of immense historical value.