Digital Elevation Model (DEM) 25 Metre Grid of Australia derived from LiDAR  

Authors / CoAuthors

Geoscience Australia

Abstract

The Digital Elevation Model (DEM) 25 Metre Grid of Australia derived from LiDAR model represents a National 25 metre (bare earth) DEM which has been derived from some 236 individual LiDAR surveys between 2001 and 2015 covering an area in excess of 245,000 square kilometres. These surveys cover Australia's populated coastal zone; floodplain surveys within the Murray Darling Basin, and individual surveys of major and minor population centres. All available 1 metre resolution LiDAR-derived DEMs have been compiled and resampled to 25 metre resolution datasets for each survey area, and then merged into a single dataset for each State. These State datasets have also been merged into a 1 second resolution national dataset.

Product Type

dataset

eCat Id

89676

Contact for the resource

Digital Object Identifier

http://dx.doi.org/10.4225/25/5653D877D3E08

Keywords

• GIS Dataset

( Theme )

• ECOLOGY Landscape

( Theme )

• DEM

( Theme )

• LAND Topography Models

( Theme )

• elevation

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_External

Publication Date

2015-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

Purpose

Maintenance Information

unknown

Topic Category

geoscientificInformation

Series Information

Lineage

he Digital Elevation Model (DEM) 5 Metre Grid of Australia derived from LiDAR represents a National 25 metre (bare earth) DEM which has been derived from some 236 individual LiDAR surveys between 2001 and 2015 covering. All available 1 metre resolution LiDAR-derived DEMs have been compiled and resampled to 25 metre resolution datasets for each survey area, and then merged into a single dataset for each State. These State datasets have also been merged into a 1 second resolution national dataset. The sourced datasets have been captured to standards that are generally consistent with the Australian ICSM LiDAR Acquisition Specifications with require a fundamental vertical accuracy of at least 0.30m (95% confidence) and horizontal accuracy of at least 0.80m (95% confidence). All 1-metre DEMs were resampled to 25-metre-resolution using a neighbourhood-mean method for analysis. Error surfaces were created along with the DEMs by calculating the difference with the National DEM.

Parent Information

Extents

[-44.0, -9.0, 112.0, 154.0]

Reference System

GDA94 (EPSG:4283)

Spatial Resolution

Service Information

Associations

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Source Information

Source data not available.