Wangaratta - DEM

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

Wangaratta - DEM

Department of Transport and Planning

Description

Title
Wangaratta - DEM 
 
 

Temporal

Time period
2019-10-072019-10-07 
 
 

Spatial

Horizontal Accuracy
0.3m 
Vertical Accuracy
0.1m 
Code
MGA Zone 55 GDA94 
 
 

Format

Title
ESRI Ascii 
 
 

Contacts

  Point of contact

  Custodian

 
 

Keywords

Topic category
  • Elevation
 
 

Resource Constraints

Use limitation
Data Vic 
Classification
Limited Distribution 
 
 

Lineage

Description
Proprietary ground classification routines in TerraScan were used to remove any non-ground points and generate an accurate ground surface. Once the ground surface had been generated a manual quality control routine was carried out using aerial imagery, hill shades, cross-sections, and profiles within the TerraSolid software suite to classify the above ground points. The vegetation was auto-classified using the height from ground method. A QA review and manual inspection was completed on a percentage of the classified tiles based on the project size and variability of the terrain. The DEM was created as a one metre cell size raster from LiDAR data classification of 2 (ground) retaining the minimum elevation value of all suitable LAS records in each cell, where no suitable value is present for a given cell the data has been filled in a two step process: 1. Isolated cells with numerous valid adjacent value are filled with a focal mean. 2. Larger gaps are triangulated then rasterized to fill. Using hydrological polygons, manually captured from an intensity raster produced by the same LiDAR data prior to classification, the DEM is processed to the minimum surrounding value where the water appears to be static and minimum transverse value along the length of waterbodies that have apparent flow, refined by an algorithm to have no counterflow along the length of the watercourse. 
 
 

Metadata Constraints 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
Dataset is complete for 3D Regional POC project extents 
 
Excess Data
 
 

Acquisition Info

Platform Type
Aerial 
Assembly
Single 
Tile Size
1 km 
 
 

Raster Data Details

Raster Type
DEM 
X Pixel Resolution (cm)
1cm 
Y Pixel Resolution (cm)
1cm 
Seamlessness
Full 
Number of Bands
1 
Band List
1 
Resampling Kernel
Nearest Neighbour 
Rectification Type
Not Entered 
Platform Name
Fixed Wing Aircraft 
 
 

Raster Type Details

DEM Creator
Not Entered 
 
 

Survey Details

Sensor

Title
Trimble AX60 
Identifier
Aerial

Type
LIDAR 
 

Aerial Survey Details

Runs
34 
Run Orientation
N-S 
Swath Width
527 
Side Overlap
30 
Flying Height Unit
agl metre 
Flight Height
450 
 
 


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