Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008105762 

Topic category

• Elevation

Resource Constraints

Use limitation

General 

Classification

Unclassified  

Other Dataset Details

Format

ESRI Ascii 

Spatial

Spatial representation type

Grid  

Reference system identifier

MGA Zone 54 GDA2020

Resolution

Horizontal Accuracy

0.3m  

Vertical Accuracy

0.2m  

Row Resolution

1cm  

Column Resolution

1cm  

Quality

Conceptual Consistency

The desired level of co-registration (at the 3 co-registration sites) was specified as 0.1m. Despite achieving this level of co-registration, there can be variability in the level of surface co-registration across the broader river AOI. Surface co-registration variability will manifest in the DEM difference product as areas of changed surface level. There are several possible underlying reasons for differences in the DEM surface including innacuracies in either of the source DEMs or real surface change. Each river Difference DEM needs to be assessed at the local site level to ascertain whether surface differences are real, an artefact of either source dataset or the result of a problem with the co-registration process. 

Missing Data

Complete for river AOI. 

Lineage

Description

DEM difference analysis was conducted on a per-river basis. The Difference DEM was generated by subtracting the existing 2009-10 DEM surface from the new DEM surface. This required the transformation of the 2009 data from GDA94 to GDA2020. The level of the old surface was vertically adjusted (co-registered) to the level of the new surface by comparing heights at selected sites representing unchanged areas. At least three unchanged co-registration sites per river were used. 

Acquisition Date

Begin date

2020-06-12 

End date

2020-06-12 

Instrument

Name

Optech Galaxy 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

1 km  

Raster Details

Number of Bands

1 

Band List

1  

Resampling Kernel

Nearest Neighbour  

Platform Name

Fixed Wing Aircraft  

Seamlessness

Full  

Rectification Type

Orthorectified  

Aerial Survey Details

Runs

21 

Run Orientation

Various  

Side Overlap

42 

Forward Overlap

60 

Flying Height Unit

agl metre  

Flight Height

1200 

About the Metadata Record

Metadata identifier

341d693d-bf55-5511-b354-1eadba9b33c8

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