Assisi Forest 2025 Updates

Below is a list of the more important Assisi Forest 2025 software updates.

Calibrating Total Height Using Tarif Estimates.

2025.2.3

Assisi can estimate total height using local tarif numbers and a cubic foot vs total height equation. A difficulty one can run into is when total height is estimated using tarif while crown height is estimated using another method. The two methods can give incompatible results, for example a crown that is higher than total height. One solution is to calculate a scaling factor for total height and then apply that factor to the crown height estimate.

This version adds the ability to calibrate tarif total heights against a total height model then apply that scaling factor to crown height estimates. This should result in compatible crown heights when both the total height model and crown height model are compatible, for example when both are from the ORGANON model.

Model Tree Groupings Moved to Calibration Fields

2025.1.2

Assisi can process growth modeling with trees in separate plots, combined into one plot or as stand table data. In previous versions, the method was set in the growth model settings. With this version, the method is stored in the Calibration TreeGroupCompile, TreeGroupGrowth and TreeGroupSimulate fields.

Thinning Triggers

2025.1.2

When to process a thinning is more often triggered by conditions on the ground rather than at a scheduled interval. Assisi can do both. And with this version you can define complex thinning triggers using C# scripting.

This version exposes a Trigger class that can be coded in C# to be as complex or as simple or plan simulations, Assisi processes your code to determine if thinning actions need to take place.

For example, here is a thinning trigger that schedules triggers based on stocking, age and habitat. This type of thinning is found within the Lake States region of the US. A prescription for White Pine is suggested in the chart below. Note that the prescription involves triggering on "Habitat" types, "Featured" species, definitions of different types of thinning: "Final Cut Shelterwood, 1st Cut Shelterwood" as well as age and TPA.

White Pine Prescription

Here is the Assisi trigger for White Pine as coded in C# scripting. The Initialize() method is used to define variables. The Trigger() method carries out the thinning log. Triggers can be a complex or simple as needed.