Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008103463 

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 55 GDA94

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 DTM difference product as areas of changed surface level. There are several possible underlying reasons for differences in the DTM surface including innacuracies in either of the source DTMs or real surface change. Each river Difference DTM 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 the common area of both river AOIs. 

Lineage

Description

DTM difference analysis was conducted on a per-river basis. The Difference DTM was generated by subtracting the existing 2009-10 DTM surface from the new DTM 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

2018-04-20 

End date

2018-04-23 

Instrument

Name

Optech T1000 Galaxy 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

1 km  

Raster Details

Number of Bands

0 

Band List

Not Entered  

Resampling Kernel

Not Entered  

Platform Name

Not Entered  

Seamlessness

Not Entered  

Rectification Type

Not Entered  

Aerial Survey Details

Runs

178 

Run Orientation

Various  

Flying Height Unit

asl metre  

Flight Height

1200 

About the Metadata Record

Metadata identifier

d3ef67b5-683a-59f6-8adc-8ddfb9908e82

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