Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008102894 

Topic category

• Elevation

Resource Constraints

Use limitation

Departmental 

Classification

Limited Distribution  

Other Dataset Details

Format

ESRI Ascii 

Spatial

Spatial representation type

Grid  

Reference system identifier

MGA Zone 55 GDA94

Resolution

Horizontal Accuracy

0.5m  

Vertical Accuracy

0.15m  

Row Resolution

1cm  

Column Resolution

1cm  

Quality

Conceptual Consistency

The consistency of the DEM¿s is mainly conditioned by the consistency of the input data set (raw LiDAR data). Errors within the raw data will have an impact on the resultant DEM. Consistency during processing for 1m and 10m DEM¿s and Intensity, included ensuring that there was sufficient buffering to minimise `edge effects¿ between 2km x 2km tiles when they are mosaiced to create a seamless terrain model. 

Missing Data

1m DEMs have been created for the whole Southern Murray Darling Basin study area, though owing to errors during the data capture process, there are sections of some 2km x 2km tiles where the DEM generation has not been entirely successful in terms of creating continuous terrain. Errors such as swathe overlaps (possibly due to calibration errors between flight paths), missing data (insufficient pulses returning to the recording device or errors during data capture) and `waves¿ (possibly owing to turbulence) cause visible artefacts in the terrain model. These errors can only be rectified through future LiDAR data capture flights over the study area. 

Lineage

Description

The 1m product has been derived from raw LiDAR data (XYZ Intensity ASCII¿s) collected by the Southern Murray Darling Basin Commission. The DEM and intensity products have been created by converting the ASCII files to a point coverage. A TIN is then generated from the points and converted to a DEM. Due to the size and quantity of data being processed a 2km x 2km tile index system was used to process all data (first and last return) for the 1m pixel products. 

Acquisition Date

Begin date

2001-04-01 

End date

2001-08-01 

Instrument

Name

Leica ALS50 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

2 km  

Raster Details

Number of Bands

0 

Band List

Not Entered  

Resampling Kernel

Not Entered  

Platform Name

Not Entered  

Seamlessness

Full  

Rectification Type

Not Entered  

DEM Details

DEM Creator

CIP  

Aerial Survey Details

Run Orientation

Not Entered  

Flying Height Unit

agl metre  

Flight Height

1400 

About the Metadata Record

Metadata identifier

18427290-fec4-550d-8293-45087ff9f92b

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