DNRED has archived images of wall maps that represent pest management treatment plans from 1952-1993. The level of detail of the maps varies greatly over the 40 years of records. Typically, these maps are at a scale of 1:500,000 where 1 centimeter represents 5 kilometers on the ground. The archived treatment plans outline the broad application blocks. Considerable effort was made to digitize these maps in a more accessible format by DNRED and NRCan-CFS. Images were ground referenced and individual treatment polygons were outlined for all years from 1952-1993 so that they could be used in modern geographic information systems. The process of creating a digital map from a hand drawn map is not perfect and slight differences are expected./Le ministère des Ressources naturelles et du Développement de l’énergie (MRNDE) a archivé des cartes murales représentant les plans de traitement antiparasitaire de 1952 à 1993. Le niveau de détail des cartes varie grandement au fil de ces 40 années. En général, ces cartes sont à l’échelle 1