Multi-Agency Ground Plot (MAGPlot) database is a Canadian forest ground-plot data repository. Different agencies, including National Forest Inventory (NFI) and 12 Canadian jurisdictions (AB, BC, MB, NB, NL, NS, NT, ON, PE, QC, SK, and YT), contributed forest ground plot datasets in their original format into MAGPlot. The datasets delivered to us were quality controlled, standardized, and harmonized, and integrated into a single, centralized, and analysis-ready format database.

The current version (MAGPlot_v1) uses the historical and most up-to-date measurements provided by the collaborators. Several datasets are excluded from this release due to pending agreements and ongoing processing, these include Manitoba, Newfoundland, Saskatchewan and Nova Scotia. The standardized and harmonized dataset were presented in eight different data tables (four sites and four trees’ measurements tables) in a relational database schema. Sites’ related tables include information pertaining to sites’ geographical locations, treatments, and disturbances while trees’ information contain information related to measured tree attributes, including trees’ biophysical parameters, tree growth, species, status, and health conditions. While all contributors provided large and small tree plot measurements, only NFI, AB, MB and SK provided regeneration plot measurements.

MAGPlot’s main objective is to present the data in a findable, accessible, interoperable, and reusable format for a pan-Canadian forest research. The future versions are expected to include more tables, new attributes, updated and/or new measurements. MAGPlot_v1 is hosted on the Canadian Council of Forest Ministers’ data portal, the National Forest Information System (http://nfis.org).