4.2.3 Auxiliary data
Auxiliary data are data often made available through the NFMS, National Forest Inventories or other national resources agencies which can play an important role in estimating emissions and removals from REDD+ activities by providing additional context for detected (or predicted changes). Auxiliary data sets can also come from neighbouring countries where similar forest types exist where there is an absence of country specific data(1). Auxiliary data may include disturbance histories, land tenure, forest management plans, harvest statistics, fire area data, wood fuel extraction data (or rate of wood energy for cooking), forest health surveys and pest impact data. It can also include biophysical measures such as climate, soil type, elevation and slope.
Box 21: Example of the use of auxiliary data
A common example of the utility of auxiliary data relates to logging, which could indicate deforestation, forest degradation or be part of sustainable forest management activities. In this case auxiliary data on the existence of sustainable forest management plans, the extent of their application and the location of concessions could help with interpretation.
In the absence of National data, regionally relevant data can be a substitute. For significant sources and sinks, the collection of national specific data should be prioritised.