Volume Estimation

Estimate salvage timber volumes from post-fire inventory data using PNW equations.

Updated Dec 20, 2025

Search Tags:#provenance #volume-estimation #PNW #salvage #defect-deduction #per-acre #species-breakdown

Ready to run

npx skills add https://github.com/jvalenzano/ranger-twin --skill volume-estimation

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Volume Estimation
Source: https://github.com/jvalenzano/ranger-twin/tree/main/agents/cruising_assistant/skills/volume-estimation
Command: npx skills add https://github.com/jvalenzano/ranger-twin --skill volume-estimation

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill enables rapid estimation of salvage timber volumes from post-fire inventories and plot data, reducing manual calculations and enabling timely salvage decisions.

Core Features & Use Cases

PNW volume calculations across multiple log rules (Scribner, Doyle, International) with defect deductions.
Per-acre expansion and species aggregation to support salvage planning and procurement decisions.
Provenance and reasoning trails for auditability, with support for custom trees, single plots, and fire-wide aggregations.

Quick Start

Install Python, then call the main entry point with inputs such as fire_id, plot_id or trees, for example:

execute({"fire_id": "cedar-creek-2022", "plot_id": "47-ALPHA", "baf": 20})

Frequently Asked Questions about Volume Estimation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I estimate timber salvage volumes from post-fire inventory data?▼

You can estimate timber salvage volumes by processing post-fire inventory data through PNW volume equations. The tool outputs per-acre volumes, species breakdowns, and applies defect deductions to support timely salvage planning decisions.

Can I calculate salvage volumes using different log scaling rules like Scribner, Doyle, and International?▼

Yes, salvage volume calculations support Scribner, Doyle, and International log rules. The tool applies these standard scaling rules alongside PNW volume equations to generate accurate per-acre estimates for harvested timber.

What is the best way to expand single plot timber volumes to per-acre estimates for an entire fire?▼

Expanding single plot timber volumes to per-acre estimates is handled automatically using basal area factor inputs. You can process individual plots, custom tree lists, or aggregate volumes across an entire fire boundary.

Do I need Python to run post-fire volume estimation scripts?▼

Yes, you need Python installed to execute the volume estimation scripts. You call the main entry point with parameters like fire_id, plot_id, and baf to process your post-fire inventory data.

How does defect deduction work when estimating salvage timber volumes?▼

Defect deduction reduces the gross calculated volume to account for fire damage and tree abnormalities. It is applied automatically during the PNW volume calculation process to ensure salvage estimates reflect recoverable timber.

Can I trace the provenance and reasoning chain for calculated salvage volumes?▼

Yes, the volume estimation outputs include provenance and confidence metadata. This provides a traceable reasoning chain for auditability, documenting how per-acre volumes and species breakdowns were calculated.