Queensland LiDAR data (Cairns Project) - Cairns Regional Council (LGA)  

Authors / CoAuthors

Grove, R.

Abstract

These datasets cover approximately 2290 sq km in the eastern and southern sectors of the Cairns Regional Council and were captured as part of the 2010 Cairns LiDAR project. This project, undertaken by Terranean Mapping Technologies 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 ESRI ASCII grid - 0.25 metre contours in ESRI Shape

Product Type

dataset

eCat Id

75946

Contact for the resource

Keywords

• Airborne Digital Data

• AU-QLD

Australian and New Zealand Standard Research Classification (ANZSRC)

• Surface Processes

• Published_Internal

Publication Date

2012-01-01T00:00:00

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 Cairns project from a fixed wing aircraft between 2 August 2010 and 1 August 2011. The long capture period was due to the early onset of the wet season and extensive wet periods across northern Queensland. Additionally the narrow coastal strip and sharp rising terrain of the range behind Cairns generated a continual bank of low cloud over the range which restricted aircraft movements for significant periods. Acquisition over tidal areas was undertaken within +/- 2 hours of low tide. GROUND SUPPORT The capture of airborne LiDAR was supported by the establishment of 3 GPS base stations which operated during the acquisition of LiDAR. These base stations collected event matched L1/L2 dual frequency GPS data at 1sec epochs. The main GPS base station was established on a known survey mark at the Cairns airport from which the aircraft operated however due to the extended range from the airfield to northern and southern project areas, additional base stations were established at the RPS office in Port Douglas for the northern areas and at Innisfail airfield in the south. In addition to the GPS base stations, surveyors measured 539 control points in 32 clusters within the project area. These survey clusters consisted of 54 Horizontal points collected at the extremities of elevated features such as building and 485 Vertical points along ground based hard surfaces such as roads, footpaths and car parks.

Parent Information

Extents

[-17.511526, -16.061909, 145.247992, 146.083791]

Reference System

GDA94 / MGA zone 55 (EPSG:28355)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

These datasets cover approximately 2290 sq km in the eastern and southern sectors of the Cairns Regional Council and were captured as part of the 2010 Cairns LiDAR project. This project, undertaken by Terranean Mapping Technologies 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 ESRI ASCII grid - 0.25 metre contours in ESRI Shape