Summary

This paper focuses on the cataloguing, data processing and visualisation of film images for studying construction and labour history during Portuguese colonial rule in Africa. As part of the European-funded project Architecture, Colonialism and Labour (ArchLabour), which examines the impact of labour on colonial architecture, this paper explores how the ArchLabour team has shaped a methodology of visual information management through the creation of a digital database that places film images at the centre of queries on the construction and labour of major colonial infrastructures, including dams, railways, settlements, ports and airports. What methods can be used to trace the multiple dimensions of construction and labour represented in colonial film images? How do tools of data management can assist research on construction history, establishing new relationships between categories and revealing unnoticed aspects of construction? How can data from the visualisation of films help research on construction history and labour?

The paper discusses the design of a digital database, built from scratch by the ArchLabour team together with a group of visual programming experts, and explores how visual data management can be applied for studying colonial construction and labour. In this light, it contributes with a practical example of film images analysis and proposes operational ways to unveil invisibilities of construction history, subaltern labour, non-human actors and material agency.