Activity Data (AD) is the estimated area of each land use type in Belize which is calculated in hectares. For REDD+ purposes, it is the estimation of the amount of forested lands within the country and how these lands change to and from the other land uses over time. Activity Data can be used to estimate deforestation and forest degradation rates and trends, as well as reforestation, changes in agricultural lands and expansion in settlements/urban areas. Activity Data, in conjunction with Emission Factors (EF), plays a vital role in the Forest Reference Emissions Level (FREL) and Greenhouse Gas Inventory emissions estimations.