Contacts

Identifiers and Keywords

ANZLIC Id

ANZVI0008101191 

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 GDA94

Resolution

Horizontal Accuracy

0.3m  

Vertical Accuracy

0.1m  

Row Resolution

1cm  

Column Resolution

1cm  

Quality

Conceptual Consistency

The DEMs are consistent with respect to their visual representation of the ground features, continuity at the tile boundaries and representation of elevation values. 

Missing Data

The DEM tiles supplied are complete for the defined project extents. No Data has a alue of -9999. 

Lineage

Description

ArcGIS 9.2 Terrain Grids were derived using the Natural Neighbor interpolation from points representing Classes 2. This method uses the closest triangles and applies weights to the proportionate areas from the grid cell centroid to interpolate the value. It uses known elevation data, it does not make any predictions regarding the surface and accurately depicts existing troughs and peaks in the data and supports irregular point spacing, which suits the nature LiDAR data. Hydro Flattening process was undertaken on the data, during editing of the LiDAR point cloud 2D hydro boundaries of water bodies were manually digitized. The hydro boundary polygons were digitized from the LiDAR intensity imagery and the LiDAR surface model, these results were verified against aerial imagery. The hydro boundaries were then draped onto LASD dataset and the minimum Z for each hydro polygon extracted. Heighted hydro polygons then incorporated into LASD dataset. LASD to DEM grid process generation using hydro flattened polygons. The Horsham project are was mereged with the 2011-12 Flood Plains LiDAR Stage 2- Wimmera CMA project. The a point cloud was used in the DEM merge process, a minimum of 50m overlap was used between the projects, cut lines were derived to avoid areas of change in the overlap area. The Ground and non ground data was reclassified in the overlap area to avoid any `noise¿ between merged datasets. The merged DEM's were created using the new merged point cloud data. Breaklines such as the water polygons digitized during the LiDAR editing stages of the Hydro Flattening were used. 

Acquisition Date

Begin date

2016-01-10 

End date

2016-01-10 

Instrument

Name

Riegl Q1560 

Type

LIDAR 

Platform Type

Aerial 

Acquisition Data (Common)

Status

complete  

Assembly

Single  

Tile Size

2 km  

Raster Details

Number of Bands

1 

Band List

1  

Resampling Kernel

Nearest Neighbour  

Platform Name

Fixed Wing Aircraft  

Seamlessness

Full  

Rectification Type

Orthorectified  

DEM Details

DEM Creator

Supplier  

Aerial Survey Details

Runs

10 

Run Orientation

N-S  

Side Overlap

33 

Forward Overlap

60 

Flying Height Unit

agl metre  

Flight Height

1400 

About the Metadata Record

Metadata identifier

c2267c5c-4025-5d1c-a81a-c3f0f9ca4cf0

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