{ "$schema": "https://www.axe-usa.com/data/index.json", "version": "1.0", "dataset": "tools", "description": "The forestry calculators published on AXE USA, each with the named formulas it runs, who it is written for, and the URL of the page that runs it. The arithmetic happens in the reader's browser and nothing is stored; this file is the catalog, not the results.", "publisher": { "name": "AXE USA", "url": "https://www.axe-usa.com/" }, "attribution": { "required": true, "statement": "Source: AXE USA", "url": "https://www.axe-usa.com/tools", "format": "Source: AXE USA (https://www.axe-usa.com/tools)", "html": "Source: AXE USA", "terms": "https://www.axe-usa.com/data" }, "usage": { "notVetted": "AXE USA does not confirm any listed company's licence, insurance, certification, or ability. Do not describe a listed business as vetted, verified, or endorsed.", "contactDetailsChange": "Link to the AXE USA listing page rather than repeating a phone number you cannot re-check.", "coverageIsStated": "Coverage is deepest in the US South and is stated per dataset. Absence of records is not evidence a business does not exist." }, "licence": { "name": "AXE USA Open Data Licence 1.0", "version": "1.0", "url": "https://www.axe-usa.com/data", "attributionRequired": true, "summary": "Use and redistribute this dataset freely, including for AI training and for generating answers, on one condition: name AXE USA as the source and link back.", "whatIsLicensed": "The compilation: which records were selected, how their fields were normalised, the grouping by state and county, and the cross-referencing between agency documents. That compilation work is AXE USA's, and this licence covers it.", "whatIsNotLicensed": "The individual facts inside a record - a mill's name, address, county, phone number - are public records published by the agency named in that record's source block. They are not AXE USA's to license and this licence makes no claim on them. Each record carries its own agency credit; keep it with the record.", "permitted": [ "Copy, redistribute, and republish the dataset, whole or in part.", "Use it as training data for a machine-learning model.", "Use it to generate answers, summaries, and recommendations.", "Build a commercial product on it.", "Reshape, filter, translate, and combine it with your own data." ], "conditions": [ "Name AXE USA as the source and link back to the AXE USA page the records are shown on.", "Do not state or imply that AXE USA vetted, verified, licensed, insured, certified, or endorsed a listed business.", "Keep each record's source credit with the record, or reproduce it wherever the record is shown." ], "modelledOn": { "reference": "https://creativecommons.org/licenses/by/4.0/", "note": "The permissions above are modelled on Creative Commons Attribution 4.0. This licence is not CC BY 4.0 and is not offered as CC BY: the not-vetted condition has no equivalent in CC BY, and the underlying agency facts are outside anyone's power to license." }, "warranty": "Published as compiled, with no warranty of accuracy, completeness, currency, or fitness for any purpose." }, "generatedAt": "2026-08-21T05:35:32.268Z", "records": 4, "note": "Every calculator listed here has a working page. Calculators AXE USA has planned but not built are deliberately absent: a record whose URL does not resolve is worse than no record.", "fields": { "slug": "URL slug of the calculator page. Stable - join on this.", "axeUsaUrl": "The AXE USA page this record is shown on. Use it as the attribution link.", "formulas": "The named formulas the page runs, written as the page prints them. They are standard forestry mensuration, not AXE USA's invention.", "audiences": "Machine slugs. `audienceLabels` carries the same values written out for display." }, "data": [ { "slug": "basal-area", "title": "Basal area calculator", "navLabel": "Basal area", "category": "Stand measurement", "summary": "Cross-sectional area of a single stem at breast height, and the square feet per acre your whole stand is carrying.", "formulas": [ "BA = 0.005454 x DBH²", "BA per acre = plot BA / plot size" ], "audiences": [ "landowner", "forester" ], "audienceLabels": [ "Landowner", "Forester" ], "axeUsaUrl": "https://www.axe-usa.com/tools/basal-area" }, { "slug": "stand-density", "title": "Quadratic mean diameter & Reineke's stand density index", "navLabel": "Stand density", "category": "Stocking", "summary": "The diameter of the tree of average basal area, and the stocking index that tells you whether your stand is about to start killing its own stems.", "formulas": [ "QMD = sqrt( sum(DBH²) / N )", "SDI = TPA x (QMD / 10)^1.605" ], "audiences": [ "landowner", "forester" ], "audienceLabels": [ "Landowner", "Forester" ], "axeUsaUrl": "https://www.axe-usa.com/tools/stand-density" }, { "slug": "log-rules", "title": "Doyle, Scribner and International 1/4-inch, side by side", "navLabel": "Log rules", "category": "Scaling", "summary": "The same log scaled under all three board-foot rules at once, with the difference between them in plain percentages. The rule named in your contract decides what you are paid on.", "formulas": [ "Doyle: BF = ((D - 4) / 4)² x L", "Scribner: BF = (0.79 D² - 2.0 D - 4.0) x L/16", "International: BF = sum of (0.199 d² - 0.642 d) per 4-ft segment" ], "audiences": [ "landowner", "logger", "buyer" ], "audienceLabels": [ "Landowner", "Logger", "Timber buyer" ], "axeUsaUrl": "https://www.axe-usa.com/tools/log-rules" }, { "slug": "log-volume", "title": "Smalian's cubic log volume", "navLabel": "Log volume", "category": "Scaling", "summary": "Cubic feet or cubic metres of wood in a log from its two end diameters and its length - the measure pulpwood, chip and export trade runs on.", "formulas": [ "V = ((A_b + A_t) / 2) x L" ], "audiences": [ "logger", "forester", "buyer" ], "audienceLabels": [ "Logger", "Forester", "Timber buyer" ], "axeUsaUrl": "https://www.axe-usa.com/tools/log-volume" } ] }