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The National Volume Estimator Library (NVEL) is a software library developed and maintained by the US Forest Service. It implements a large number of published taper functions and volume equations. It has NVEL is used within other applications developed by the US Forest Service, including the Forest Vegetation Simulator https://www.fs.fed.us/fvs/index.shtml and the National Cruise Program https://www.fs.fed.us/forestmanagement/products/measurement/cruising/fscruiser/index.php. It provides tools that allow access to NVEL functions within Excel and R, and the ability as well as interfaces to call NVEL functions from various software development languages such as VB Visual Basic and C#. More information about NVEL can be found at https://www.fs.fed.us/forestmanagement/products/measurement/volume/nvel/index.php . InventoryManager uses NVEL includes a custom cloud-hosted implementation of NVEL and uses this to apply default or user-selected equations to merchandize trees and calculate volume. It combines the field-measured values, NVEL taper equations and user-defined merchandising specs to achieve industry standard volume calculations at locations throughout the US. InventoryManager then compiles these tree level data and provides reports at the stand or sale level, allowing for a range of groupings, units, statistics, and report layouts.
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