Authors / CoAuthors
Grove, R.
Abstract
These datasets cover approximately 1700 sq km along the eastern boundary of the Townsville City Council and over all of Magnetic Island and are part of the 2009 North Queensland LiDAR capture project. This project, undertaken by Photomapping Services 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, vegetation or building) - 1 metre Digital Elevation Model (DEM) in ASCII xyz - 0.25 metre contours in ESRI Shape
Product Type
dataset
eCat Id
74155
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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- DEM topographic
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- AU-QLD
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
- Topology
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- Published_Internal
Publication Date
2011-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Special, MOU, etc.
Access - restricted
Use - license
Status
Purpose
Maintenance Information
unknown
Topic Category
elevation
Series Information
Lineage
Airborne Laser Scanning (ALS) data was acquired around Brandon and Townsville for the North Queensland project from a fixed wing aircraft between 17 June 2009 and 10 September 2009. Acquisition over tidal areas was undertaken within +/- 2 hours of low tide. DATA PROCESSING Ground Point Classification: An automatic ground algorithm separates ground points from other points. For the cane field areas the ground algorithm was adjusted to eliminate false ground points which appeared in the top of the cane. Separate algorithms were used for areas within and outside cane field areas. Further manual editing was required to complete the ground classification in cane field, rainforest and mangrove areas. Ground categories: Ground points and Model key points Non Ground categories: Vegetation being 80-90% correct. Low vegetation 0.10m - 0.35m, medium vegetation 0.35m - 1.50m, high vegetation greater than 1.5m. Vegetation may contain remnant buildings points, cars, fences, power poles and other objects Buildings: Buildings being 80-90% correct. May contain wrongly classified points (mostly should be high veg.) Water: Ocean and rivers wider than 20m Overlap: Includes ground and non-ground points in the overlap between runs Contours: Contours are derived from the ground model key points using TerraModel software. Contour polygons less than 10 point/m2 have been removed in flat areas.
Parent Information
Extents
[-19.5332, -18.9201, 146.2565, 147.1519]
Reference System
GDA94 / MGA zone 55 (EPSG:28355)
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
These datasets cover approximately 1700 sq km along the eastern boundary of the Townsville City Council and over all of Magnetic Island and are part of the 2009 North Queensland LiDAR capture project. This project, undertaken by Photomapping Services 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, vegetation or building) - 1 metre Digital Elevation Model (DEM) in ASCII xyz - 1 metre Digital Elevation Model (DEM) in point shapefile format - 0.25 metre contours in ESRI Shape