All Resources

Methods for determining the accuracy and comparing the agreement between ground measures and advanced forest inventory techniques

Description

Two critical questions often arise in forest management pertaining to the accuracy and suitability of any new forest inventory technique at the tree or stand level: how can we judge whether a new... More ≫

Description

Two critical questions often arise in forest management pertaining to the accuracy and suitability of any new forest inventory technique at the tree or stand level: how can we judge whether a new inventory technique is valid or of acceptable accuracy; and how can we compare if a new inventory technique agrees with or is better than an existing one. This technical document describes the procedures and the statistical methods that collectively provide the tools to address and answer these questions.

Tags

Expanded individual tree diameter prediction models from tree height and other variables

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree... More ≫

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree species. These models predict individual tree diameters at breast height from tree heights (varies by report). They can be used at both the population and plot-specific levels with varying degrees of accuracy. Different procedures for making the predictions under different circumstances are presented. Examples of model application are demonstrated based on real data.

Tags

Expanded individual tree height prediction models from tree diameter and other variables

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree... More ≫

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree species. These models predict individual tree diameters at breast height from tree heights (varies by report). They can be used at both the population and plot-specific levels with varying degrees of accuracy. Different procedures for making the predictions under different circumstances are presented. Examples of model application are demonstrated based on real data.

Tags

Individual tree diameter prediction models from tree height

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree... More ≫

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree species. These models predict individual tree diameters at breast height from tree heights (varies by report). They can be used at both the population and plot-specific levels with varying degrees of accuracy. Different procedures for making the predictions under different circumstances are presented. Examples of model application are demonstrated based on real data.

Tags

Updated population and plot-specific individual tree height-diameter models for major Alberta tree species

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree... More ≫

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree species. These models predict individual tree diameters at breast height from tree heights (varies by report). They can be used at both the population and plot-specific levels with varying degrees of accuracy. Different procedures for making the predictions under different circumstances are presented. Examples of model application are demonstrated based on real data.

Tags

Expanded individual tree diameter prediction models from tree height and crown size

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree... More ≫

Description

Based on the nonlinear least squares method and nonlinear mixed-effects modeling technique, provincial and subregion-specific tree diameter prediction models were developed for major Alberta tree species. These models predict individual tree diameters at breast height from tree heights (varies by report). They can be used at both the population and plot-specific levels with varying degrees of accuracy. Different procedures for making the predictions under different circumstances are presented. Examples of model application are demonstrated based on real data.

Tags

A growth and yield projection system for natural and post-harvest stands in Alberta : predicting merchantable density

Description

This report outlines the sub-models developed to estimate merchantable density for the four species groups modeled by the Growth and Yield Projection System (GYPSY). These sub-models were designed... More ≫

Description

This report outlines the sub-models developed to estimate merchantable density for the four species groups modeled by the Growth and Yield Projection System (GYPSY). These sub-models were designed to work in concert with the GYPSY sub-models published in May 2009 (see Related).

Tags

A growth and yield projection system for natural and post-harvest stands in Alberta

Description

Growth and Yield Projection System (GYPSY) is a forest growth model composed of a number of sub-models or functions. GYPSY is used to forecast the growth and yield of stands of trees on a per... More ≫

Description

Growth and Yield Projection System (GYPSY) is a forest growth model composed of a number of sub-models or functions. GYPSY is used to forecast the growth and yield of stands of trees on a per hectare basis. The 2009 version has been updated to include modelling capability for multiple species in pure and mixed species stands. It also enables forest managers to predict future growth based on reforestation survey results.

Tags