Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008102824 

Topic category

• Elevation

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Other Dataset Details

Format

LAS 1.2 - Class(Model Key Points, Non-Ground) 

Spatial

Spatial representation type

Point Cloud  

Reference system identifier

MGA Zone 55 GDA94

Resolution

Horizontal Accuracy

0.2m  

Vertical Accuracy

0.2m  

Quality

Conceptual Consistency

The definition of the ground may be less accurate in isolated pockets of dissimilar terrain/vegetation combinations. Accuracy of the ground surface under dense canopy may be reduced. Laser accuracy at swath edges may be reduced. 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. 

Missing Data

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. 

Lineage

Description

Laser strikes were classified into ground and non-ground points using a single algorithm across the project area. Further classification by algorithm was undertaken to distinguish above ground features, such as buildings and vegetation. Manual checking and editing of the data classification was compared against available imagery to further improved the quality of the classification and terrain model. The LAS file point classifications levels are formatted to comply with ICSM Standard LiDAR Point Classes. GPS base station support was provided by GPSnet CORS base stations. Ground check points allowed an assessment of the accuracy of the ALS data. 

Acquisition Date

Begin date

2012-01-24 

End date

2012-01-24 

Instrument

Name

Optech ALTM Pegasus 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

2 km  

Point Cloud Details

Pulse Mode

Single Pulse, Multi Channel 

Scan Rate (Hz)

31Hz  

Scan Frequency (kHz)

200kHz  

Scan Angle (degrees)

20degrees  

Footprint Size (m)

0.36000001m  

Point Density Actual (pts/m2)

4points/m2  

Point Spacing Actual (pts/m)

0.5points/m2  

Ellipsoid Provided

1 

Ellipsoid Vertical Datum

GRS80 Ellipsoidal (ITRF2005)  

Ellipsoid Format

LAS 1.2 - Class(Model Key Points, Non-Ground)  

Geoid Vertical Datum

MELBOURNEGEOID08  

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	0	1	1	1	0

Aerial Survey Details

Runs

11 

Run Orientation

E-W  

Swath Width

872 

Side Overlap

25 

Flying Height Unit

agl metre  

Flight Height

1200 

About the Metadata Record

Metadata identifier

3f55f606-b4aa-52c9-985f-bb6e1248751a

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