Contacts

 

Identifiers and Keywords

ANZLIC Id

ANZVI0008103501 

Topic category

• Elevation

 

Resource Constraints

Use limitation

General 

Classification

Unclassified  

 

Other Dataset Details

Format

Other 

 

Spatial

Spatial representation type

Point Cloud  

Reference system identifier

MGA Zone 55 GDA2020

 

Resolution

Horizontal Accuracy

0.2m  

Vertical Accuracy

0.1m  

 

Quality

Conceptual Consistency

The data adheres to the logical rules of data structure, attribution and relationships as per project specifications. Dataset provided as LAS 1.4. 

Missing Data

Point cloud dataset is complete for the defined project extent. 

 

Lineage

Description

The IMU and post processed airborne GPS logs were used to generate the LiDAR point cloud from the waveform instrument data. Raw LiDAR swaths were levelled to establish internal consistency, merged and 1km x 1km tiles in LAS v1.2 format were created. An automatic classification algorithm was applied in TerraScan software to produce an initial classification of ground (2) and unclassified (1). High and low noise points were automatically classified and allocated to class 7. The ground classification was improved manually by visually scanning the ground surface and reassigning points from ground to unclassified to remove spikes and by assigning unclassified points to ground where the ground surface lacked sufficient detail to describe the terrain (i.e. large TIN triangles). The classification of ground points was to the ICSM level 2 standard (98% accuracy with respect to ground points). On completion of the ground classification automatic algorithms were used to classify unclassified points to low vegetation (3), medium vegetation (4), high vegetation (5), buildings (6), water (9) and bridge (10). Ground points were confirmed and retained. The classification accuracy was not measured empirically. Upon successful classification, the dataset was converted from ellipsoidal to orthometric using AusGeoid09, and tiles were regenerated to 1km x 1km and LAS v1.4. 

 

Acquisition Date

Begin date

2017-11-28 

End date

2018-10-27 

 

Instrument

Name

Trimble AX60 

Type

LIDAR 

Platform Type

Aerial 

 

Acquisition Data (Common)

Status

complete  

Assembly

Mosaic  

Tile Size

1 km  

Cloud Cover Percentage

0 

 

Point Cloud Details

Pulse Mode

Multipulse 1-8 

Scan Rate (Hz)

178Hz  

Scan Frequency (kHz)

400kHz  

Scan Angle (degrees)

30degrees  

Footprint Size (m)

0.12m  

Point Density Target (pts/m2)

8points/m2  

Point Density Actual (pts/m2)

8points/m2  

Point Spacing Target (pts/m)

0.34999999points/m2  

Point Spacing Actual (pts/m)

0.38points/m2  

Ellipsoid Provided

1 

Ellipsoid Vertical Datum

GRS80 Ellipsoidal (ITRF2005)  

Ellipsoid Format

Other  

Geoid Vertical Datum

AUSGEOID09  

Additional Adjustments

Provided as LAS 1.4 

Environmental Conditions

Project was specified to be flown in appropriate environmental conditions, free of cloud, fog and heavy smoke haze. 

Tidal Conditions

Coastal areas were specified to be captured within 2 hours of low tide. 

Class Level

2 

Classification

Class Level	Class 0 - Unclassified	Class 1 - Default	Class 2 - Ground	Class 3 - Low Vegetation	Class 4 - Medium Vegetation	Class 5 - High Vegetation	Class 6 - Buildings/Structures	Class 7 - Low/High Points	Class 8 - Model Key Points	Class 9- Water	Class 10 - Bridge	Class 12 - Flightline Overlap Points
2	1	1	1	1	1	1	1	1	1	1	1	0

 

Aerial Survey Details

Runs

4567 

Run Orientation

E-W and N-S  

Swath Width

520 

Side Overlap

30 

Flying Height Unit

agl metre  

Flight Height

450 

 

About the Metadata Record

Metadata identifier

e327de67-2651-5eb5-be23-d7e6dbefab3c

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