NCCMA - Stage 2 Floodplains - DEM

dataset
Dataset: NCCMA - Stage 2 Floodplains - DEM Assembly: Single
 
Citation proposal Citation proposal

NCCMA - Stage 2 Floodplains - DEM

Department of Transport and Planning
 

Description

Title
NCCMA - Stage 2 Floodplains - DEM 
Resource Type
Dataset  
 
 

Temporal

 
 

Spatial

Spatial representation type
Grid  
Horizontal Accuracy
0.2m  
Code
MGA Zone 54 GDA94 
 

 

Maintenance

 
 

Format

Title
ESRI Ascii 
 
 

Contacts

  Point of contact

 
 

Keywords

Topic category
  • Elevation
 
 

Resource Constraints

Use limitation
General 
Classification
Unclassified  
 
 

Lineage

Description
Proprietary software was used to generate the DEM from the un-thinned classified ground returns. The solution determines the elevation of each cell by calculating the weighted average elevation of all ground returns within the cell. Gaps of one cell are assigned the mean of surrounding cells while larger gaps are interpolated by triangulation from surrounding cells. The DEM is then masked back to the area boundary and exported in tiles. 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Positional Accuracy
Conceptual Consistency
Comments
Some stepping between swaths may be present due to turbulence at the time of capture. The definition of the ground surface under canopy may be less accurate. 
Missing Data
Comments
Some voids may be present in areas of diminished returns 
Excess Data
 
 

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