Identifiers and Keywords

ANZLIC Id

ANZVI0008103052 

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

0.18m  

Vertical Accuracy

0.1m  

 

Quality

Conceptual Consistency

Ground definition in vegetated terrain may contain localized areas with systematic errors or outliers which fall outside this accuracy estimate. Gaps may occur due to diminished returns over water and materials with low laser reflectivity, such as black composite roofing.The definition of the ground may be less accurate in isolated pockets of dissimilar terrain/vegetation combinations. Accuracy of the ground surface under or within dense canopy/vegetation may be reduced. 

Missing Data

Gaps may occur due to diminished returns over water, under canopy and on materials with low laser reflectivity, such as black composite roofing. 

 

Lineage

Description

LiDAR data captured using onboard GPS, IMU and network of ground basestations. Trajectories and laser data corrected initially using the AusGeoid09 and then adjusted to AHD using local PSMs. LiDAR data is classified into multiple ground and non-ground classes. Project model key points classified from Ground class automatically; Vegetation (high, medium and low) classified automatically; Bridges classified manually. Ground points are selected from the laser point cloud through iteratively building a triangulated surface model. The building size gives the starting surface point density and the iteration angle determines how close a point has to be to the surface to be included. Ground point thinning is an iterative process similar to ground point classification. 

 

Acquisition Date

Begin date

2016-01-17 

End date

2016-01-17 

 

Instrument

Name

ALTM Gemini 

Type

LIDAR 

Platform Type

Aerial 

 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

2 km  

 

Point Cloud Details

Pulse Mode

Single Pulse 

Scan Rate (Hz)

47Hz  

Scan Frequency (kHz)

70kHz  

Scan Angle (degrees)

15degrees  

Footprint Size (m)

0.30000001m  

Point Density Actual (pts/m2)

2.03999996points/m2  

Point Spacing Actual (pts/m)

0.69999999points/m2  

Ellipsoid Provided

1 

Ellipsoid Vertical Datum

GRS80 Ellipsoidal (ITRF2005)  

Ellipsoid Format

LAS 1.3  

Geoid Vertical Datum

AUSGEOID09  

Environmental Conditions

1. Cloud and fog free between the aircraft and the ground. 2. Floodplain/wetland data must be captured during times of base-flow and outside of significant surface inundation due to natural events and /or regulated environmental flows. 3. Flights should not be undertaken during periods of heavy smoke haze. 

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	0	1	1	1	1	1	1	0	1	1	1	1

 

Aerial Survey Details

Runs

8 

Run Orientation

NW-SE  

Swath Width

725 

Side Overlap

30 

Flying Height Unit

agl metre  

Flight Height

1000 

 

About the Metadata Record

Metadata identifier

156fcceb-24c2-5580-9933-33ac0c2120dd

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