LIS Forestry

LIS Forestry - silvicultural analyses

The package contains tools for forest masking, crown coverage computation, single tree derivation, tree shape metrics, creation of 3D vector models of trees and volume calculations (biomass, stem volume). Applications include silvicultural analyses and management and the creation of map layers for tree cadastres.


Tool: 3D Tree Modeller (PC)

Features
• creation of 3D vector models of trees from a point cloud data set
• point cloud segmentation by Dijkstra region growing from seed points
• outputs: point cloud, 3D skeleton (line) shapefile, 3D pipe (polygon) shapefile
• parameters derived: radius, diameter, slice area, volume, hierarchy, ...
Application
• derivation of 3D vector models of trees
• derivation of tree metrics
• detailed geometrical forest models
• wood volume and biomass estimations

Tool: Crown Coverage and Forest Mask

Features
• calculation of crown coverage [%]
• derivation of a forest mask
• constraints: tree height, crown coverage, area of a forst stand, area of a forest cleaning, width of a forest stand
Application
• crown coverage maps
• forest mask (forested area, no free-standing trees or hedges)
• map layers

Tool: Single Tree Derivation

Features
• segmentation of Canopy Height Models (CHM)
• derivation of segments representing treetops of single trees
• detection of tree trunk positions
Application
• detection of single trees (position and area)
• input data preparation for the "Tree Shape Metrics" tool

Tool: Tree Shape Metrics

Features
• area-wide calculation of shape metrics of single trees
• metrics: x, y, tree height, crown area, crown radius (approx.), crown diameter (approx.), shape ratio
• filter options: area and shape ratio (e.g., removal of elongated segments)
Application
• area-wide mapping of tree shape metrics
• tree cadastres
• map layers

Tool: Tree Trunk Detection

Features
• tree trunk detection within a highly detailed forest point cloud
• filter options
• circle detection
Application
• detection of tree trunks
• calculation of diameter at breast height (DBH)
• creation of seed points
• input data preparation for the "3D Tree Modeller (PC)" tool

Tool: Volume Model (Grid): Calibration

Features
• calibration of a volume model from reference sample plots by multiple linear regression analysis
• analysis of four height slices (user defined thresholds)
• input: Canopy Height Model (CHM) raster data set, sample plot center points with reference data
Application
• volume model calibration from raster data and forest plot information
• input data preparation for grow stock or biomass mapping

Tool: Volume Model (Grid): Mapping

Features
• calculation of volume in each cell of a canopy height model raster
• volume estimation by multiple linear regression analysis
• analysis of four height slices (user defined thresholds)
• input: Canopy Height Model (CHM) raster data set, calibration coefficients
Application
• volume mapping (e.g., stem volume, biomass, ...)
• creation of biomass map layers
• biomass estimation and monitoring

Tool: Volume Model (PC): Calibration

Features
• calibration of a volume model from reference sample plots by multiple linear regression analysis
• analysis of four height slices (user defined thresholds)
• input: point cloud with normalized z attribute (CHM), sample plot center points with reference data
Application
• volume model calibration from point cloud data and forest plot information
• input data preparation for grow stock or biomass mapping

Tool: Volume Model (PC): Mapping

Features
• calculation of volume for each point in a point cloud
• volume estimation by multiple linear regression analysis
• analysis of four height slices (user defined thresholds)
• input: point cloud with normalized z attribute (CHM), calibration coefficients
Application
• volume mapping (e.g., stem volume, biomass, ...)
• creation of biomass map layers
• biomass estimation and monitoring

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