Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008102892 

Topic category

• Elevation

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Other Dataset Details

Format

XYZ ASCII 

Spatial

Spatial representation type

Point Cloud  

Reference system identifier

MGA Zone 55 GDA94

Resolution

Horizontal Accuracy

0.35m  

Vertical Accuracy

0.1m  

Quality

Conceptual Consistency

ALS strikes on water bodies have been ommitted from the dataset. The definition of the ground under trees may be less accurate. 

Missing Data

The LiDAR datasets representing various ground and non-ground features are complete for the defined project extents. 

Lineage

Description

Unthinned ground points Fugro Spatial Solutions Pty Ltd aim is to select those points that are part of a clean ground surface, which might not be 100% of the ground hits. This results in a cleaner dataset, without compromising on terrain detail and accuracy. Ground filtering algorithms, tailored for this project, data type and terrain type, are applied to the full dataset. The ground filtered dataset is then visually checked by an operator, and incorrectly classified data is corrected or the ground filtering algorithm is adjusted and then visually checked. For the verification of the ground classifications, intensity imagery is used as a backdrop image. Thinned ground points A modelkey point dataset is extracted from the unthinned ground points dataset, consisting of those points that contribute to the shape of the terrain. Non contributing points are removed. First return points The ALS system is capable of collection a total of 4 returns from each pulse. This dataset consists of only the first returns, which can also be single returns. Last return points This dataset consists of only the last returns, which can also be single returns. non-ground points Any lidar return, not classified as ground, but higher than ground, is classified as non-ground return. Points closer than 30cm from the ground surface are eliminated from this dataset, to avoid having very low bushes, schrubs and grasses becoming part of this dataset. Contours Smoothed contours at 0.5 interval have been generated over the project area. 

Acquisition Date

Begin date

2008-07-28 

End date

2008-08-03 

Instrument

Name

Leica ALS50 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

2 km  

Point Cloud Details

Footprint Size (m)

0.31999999m  

Ellipsoid Provided

0 

Aerial Survey Details

Runs

67 

Run Orientation

E-W  

Swath Width

992 

Side Overlap

20 

Flying Height Unit

agl metre  

Flight Height

1400 

About the Metadata Record

Metadata identifier

fdf0e902-ae65-5785-b848-f7965a894c9a

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