Authors / CoAuthors
Grove, R.
Abstract
These datasets cover all of Moreton Bay Regional Council and are part of the 2009 South East Queensland LiDAR capture project. This project, undertaken by AAM Hatch Pty Ltd on behalf of the Queensland Government captured highly accurate elevation data using LiDAR technology. Available dataset formats (in 1 kilometre tiles) are: - Classified las (LiDAR Data Exchange Format where strikes are classified as ground, non-ground or building) - 1 metre Digital Elevation Model (DEM) in ESRI binary grid - 10 metre Digital Elevation Model (DEM) mosaic in ESRI binary grid - 1 metre Digital Elevation Model (DEM) in ESRI ASCII grid - 0.25 metre contours in ESRI Shape
Product Type
dataset
eCat Id
74577
Contact for the resource
Custodian
Custodian
Lev 2, Landcentre, Cnr Main and Vulture GPO Box 2454
Woolloongabba
QLD
4001
Australia
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS Dataset
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- AU-QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2010-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Special, MOU, etc.
Access - restricted
Use - license
Status
Purpose
Maintenance Information
unknown
Topic Category
geoscientificInformation
Series Information
Lineage
Airborne Laser Scanning (ALS) data was acquired for the SEQ Area from a fixed wing aircraft. Acquisition over tidal areas was undertaken within +/- 2 hours of low tide. DATA PROCESSING Laser strikes were classified into ground and non-ground points using a single algorithm across the project area. Manual checking and editing of the data classification further improved the quality of the terrain model. FURTHER PROCESSING Thinned Ground: Thinned ground points have been derived by removing superfluous points not contributing to the definition of the ground surface. Buildings: Building points have been classified using an automatic algorithm tailored for the project area. No manual checking of building points has been undertaken. There may be occurences of non-ground strikes being incorrectly classified as buildings and conversely building strikes remaining classified as non-ground. Non-ground: Non-ground points have been filtered by removing points within 0.2m of the ground surface to reduce incidence surface 'noise'. Points classified as non-ground may include laser strikes on the surface of water bodies. Contours: Contours have been generated automatically from a smoothed triangulated ground model and visually checked for completeness and logical consistency. Some cartographic license has been applied in areas where laser points were not captured. Original contours supplied by the contractor have been generalised to reduce file size with no discernable difference in shape. The Point-Remove tool in ARCGIS from ESRI is used to perform this task. The maximum allowable offset in the simplification tolerance is set to 0.1 metre. DEM: An ArcGIS 9.2 Terain model was created from the LiDAR ground points and interpolated coastal boundaries, from which tiled ESRI grids and ASCII xyz files were generated.
Parent Information
Extents
[-27.7922, -27.4223, 152.6511, 153.2073]
Reference System
GDA94 / MGA zone 56 (EPSG:28356)
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
These datasets cover all of Moreton Bay Regional Council and are part of the 2009 South East Queensland LiDAR capture project. This project, undertaken by AAM Hatch Pty Ltd on behalf of the Queensland Government captured highly accurate elevation data using LiDAR technology. Available dataset formats (in 1 kilometre tiles) are: - Classified las (LiDAR Data Exchange Format where strikes are classified as ground, non-ground or building) - 1 metre Digital Elevation Model (DEM) in ESRI binary grid - 10 metre Digital Elevation Model (DEM) mosaic in ESRI binary grid - 1 metre Digital Elevation Model (DEM) in ESRI ASCII grid - 0.25 metre contours in ESRI Shape