Geelong - DEM

dataset
Dataset: Geelong - DEM Assembly: Single
 
Citation proposal Citation proposal

Geelong - DEM

Department of Transport and Planning
 

Description

Title
Geelong - DEM 
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 1m DEM Grids were derived using the Natural Neighbour interpolation using the ground and thinned ground classification classes. This method uses the closest triangles and applies weights to the proportionate areas from the grid cell centroid to interpolate the value. It uses known elevation data, it does not make any predictions regarding the surface and accurately depicts existing troughs and peaks in the data and supports irregular point spacing, which suits the nature LiDAR data. Grids were then translated to ESRI ASCII formats using custom ArcGIS and Feature Manipulation Engine (FME) macros. 
 
 

Metadata Constraints

Classification
Unclassified  
 
 

Quality

Attribute Quality
Positional Accuracy
Conceptual Consistency
Comments
The data is consistent with respect to the visual representation of ground and non-ground features, continuity at the tile boundaries and representation of elevation values. 
Missing Data
Comments
The data is complete for the defined project extent. 
Excess Data
 
 

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