Class: thinning

The thinning module include activities thinning operations.

Methods Overview

Returns: object

Thinning from below

Parameters:

options (object): @param {string} options.id A unique identifier for the thinning activity (default: ‘ThinningFromBelow’). @param {object} options.schedule schedule for the repeater (default: {min: 30, opt: 40, max: 50}). @param {number} options.interval interval between repeated thinnings (default: 5). @param {number} options.times number of times to repeat the thinning (default: 5). @param {boolean} options.block block other activities in repeater (default: true). @param {string} options.mode mode of thinning, either ‘simple’ or ‘dynamic’ (default: ‘simple’). @param {number|function} options.thinningShare share of trees to be thinned, can be a number or a function returning a number (default: 0.1). @param {number[]} options.thinningClasses array defining how much of each thinning class should be removed (default: [60, 25, 15, 0, 0]). @param {number|undefined} options.speciesSelectivity species list, which species should have a lower probability to get harvested (default: undefined). @param {string} options.ranking ranking string for filtering trees, e.g. ‘volume’ (default: ‘volume’). @param {string} options.sendSignal signal for triggering the thinning (default: ‘thinning_execute’). @param {string|undefined} options.constraint constraint (default: undefined).

Return Value Description: program - An object describing the thinning program

Example:

lib.thinning.fromBelow({
        schedule: { min: 25, opt: 35, max: 45 },
        interval: 10,
        thinningShare: 0.3
    });

Returns: object

Plenter thinning operation

Parameters:

options (object): @param {string} options.id A unique identifier for the thinning activity (default: ‘Plenter’). @param {object|undefined} options.schedule schedule for the thinning (default: undefined). @param {number} options.times number of thinning actions (default: 1000). @param {number} options.interval interval between thinning actions (default: 5). @param {object} options.plenterCurve object defining target diameter distribution i.e. plenter curve. @param {number} options.dbhSteps width of dbh classes to compare with plenterCurve (default: 5). @param {number} options.intensity intensity of thinning activity, specifying which share of trees to remove should be removed (default: 1). @param {boolean} options.block block other activities in repeater (default: true). @param {string} options.sendSignal signal for triggering the thinning (default: ‘plenter_execute’). @param {string|undefined} options.constraint constraint (default: undefined).

Return Value Description: program - An object describing the plenter thinning program

Example:

lib.thinning.plenter({
        interval: 5,
        plenterCurve: { 10: 350, 20: 150, 30: 80, 40: 40, 50: 20 },
           dbhSteps: 10
    });

Returns: object

Tending operation

Parameters:

options (object): @param {string} options.id A unique identifier for the tending activity (default: ‘Tending’). @param {object|undefined} options.schedule schedule for the tending (default: undefined). @param {number} options.times number of tending actions (default: 3). @param {number} options.interval interval between tending actions (default: 2). @param {object} options.speciesSelectivity object defining species selectivity, e.g. { ‘fasy’: 0.9, ‘abal’: 0.8, ‘rest’: 0.2 } (default: { ‘rest’: 0.9 }). @param {number} options.intensity intensity of tending (default: 10). @param {boolean} options.block block other activities in repeater (default: true). @param {string} options.sendSignal signal for triggering the tending (default: ‘tending_execute’). @param {string|undefined} options.constraint constraint (default: undefined).

Return Value Description: program - An object describing the tending program

Example:

lib.thinning.tending({
        times: 5,
        interval: 3,
        speciesSelectivity: { 'piab': 0.7, 'lade': 0.6 }
    });