Central Highlands - Canopy Height (CHM)

dataset
Dataset: Central Highlands - Canopy Height (CHM) Assembly: Single
 
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Central Highlands - Canopy Height (CHM)

Department of Transport and Planning
 

Description

Title
Central Highlands - Canopy Height (CHM) 
Resource Type
Dataset  
 
 

Temporal

 
 

Spatial

Spatial representation type
Grid  
Horizontal Accuracy
0.2m  
Code
MGA Zone 55 GDA94 
 

 

Maintenance

 
 

Format

Title
ESRI Ascii 
 
 

Contacts

  Point of contact

 
 

Keywords

Topic category
  • Elevation
 
 

Resource Constraints

Use limitation
General 
Classification
Unclassified  
 
 

Lineage

Description
The CHM (canopy height above ground) surface was produced by firstly generating a vegetation elevation surface by selecting the highest LiDAR point present on each one metre cell with classification of low, medium, or high vegetation (4, 5, or 6), and assigning elevation. The DEM was subtracted from the vegetation elevation surface to form the CHM. The CHM was exported to ESRI Floating Point grid Ascii as 1km by 1km tiles. 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Positional Accuracy
Conceptual Consistency
Comments
The data adheres to the logical rules of data structure, attribution and relationships as per project specifications. 
Missing Data
Comments
The project area boundary was flight planned with an additional 100m buffer to ensure full coverage would be obtained, and coverage was reviewed at the end of each days capture. Classification is validated at multiple stop points throughout the processing workflow to ensure classes are correct, coverage is complete and interpolation is minimal in generated surfaces. 
Excess Data
 
 

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