Queensland LiDAR data (South East Queensland Project) - Gold Coast City Council (LGA)  

Authors / CoAuthors

Grove, R.

Abstract

These datasets cover all of Gold Coast City 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 ASCII xyz - 1 metre Digital Elevation Model (DEM) in ESRI ASCII grid - 0.25 metre contours in ESRI Shape Purpose: To provide highly accurate elevation data for use in risk assessment, the management of natural disasters, infrastructure planning, developing strategies to support climate change, topographic mapping and modelling. Environment description: Language: eng Character set: unknown

Product Type

dataset

eCat Id

75781

Contact for the resource

Keywords

• Airborne Digital Data

( Theme )

• marine

• AU-QLD

Australian and New Zealand Standard Research Classification (ANZSRC)

• Surface Processes

• Published_Internal

Publication Date

2010-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Special, MOU, etc.

Access - restricted

Use - license

Status

Purpose

Maintenance Information

unknown

Topic Category

elevation

Series Information

Lineage

LI_Lineage: ACQUISITION 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. DEM: An ArcGIS 9.2 Terain model was created from the LiDAR ground points and interpolated

Parent Information

Extents

[0.0, 0.0, 0.0, 0.0]

Reference System

GDA94 / MGA zone 56 (EPSG:28356)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

These datasets cover all of Gold Coast City 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 ASCII xyz - 1 metre Digital Elevation Model (DEM) in ESRI ASCII grid - 0.25 metre contours in ESRI Shape