Identifiers and Keywords

ANZLIC Id

ANZVI0008102836 

Topic category

• Elevation

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Other Dataset Details

Format

LAS 1.2 

Spatial

Spatial representation type

Point Cloud  

Reference system identifier

MGA Zone 55 GDA94

Resolution

Horizontal Accuracy

0.2m  

Vertical Accuracy

0.1m  

Quality

Conceptual Consistency

Accuracy of the ground surface under dense canopy may be reduced. Laser accuracy at swath edges may be reduced. There is no difference in the processing of returns over water and over land. 

Missing Data

Gaps in the point cloud may have occurred due to gate range restrictions over areas with large terrain elevation differences. These were reflown to ensure full coverage. Gaps may occur due to diminished returns over water and materials with low laser reflectivity, such as black composite roofing. 

Lineage

Description

LiDAR was acquired in ellipsoid co-ordinates by logging against a position solution obtained from the onboard IMU and GPS and the Victorian CORS network. The LiDAR was then checked against an ellipsoid control composed of surveyed ground control points and adjusted if required. The ellipsoid co-ordinates were then reduced to AHD using AusGeoid09 (Beta 7 and V1.01). Checks against AHD control resulted in a further general and local adjustments where required. An automated algorithm, tailored to the project, was used to classify ground and non ground returns. The results were manually checked using intensity imagery and the algorithm adjusted and the process reiterated until a clean ground surface was produced. Points more than 30cm above the classified ground surface are classified as non ground. 

Acquisition Date

Begin date

2012-03-06 

End date

2012-03-06 

Instrument

Name

Leica ALS50-II 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

1 km  

Point Cloud Details

Scan Rate (Hz)

37Hz  

Footprint Size (m)

0.36000001m  

Point Density Actual (pts/m2)

2points/m2  

Ellipsoid Provided

0 

Aerial Survey Details

Run Orientation

Not Entered  

Flying Height Unit

Not Entered  

About the Metadata Record

Metadata identifier

45b1078a-848a-5da1-8ac8-b75036026453

Resource Type

Dataset  

Date info ( Revision )

2023-03-22T00:22:23

Standard Name

ISO 19115-3:2018 

Profile Name

DELWP Profile 

Profile Version

Version 1 

Profile Date

2019-05-24  

Metadata Constraints

Classification

Unclassified