Queensland LiDAR data (Lower Burdekin Project) - Burdekin Regional Council (LGA)  

Authors / CoAuthors

Abstract

These datasets cover approximately 980 sq km in the western sector of the Burdekin Regional Council and are part of the 2011 Lower Burdekin LiDAR capture project. This project, undertaken by Fugro Spatial Solutions 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

Product Type

dataset

eCat Id

75940

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

Ground Classifications Fugro Spatial Solutions Pty Ltd aim is to select those points that are part of a clean ground surface, which might not be 100% of the ground hits. This results in a cleaner dataset, without compromising on terrain detail and accuracy. Ground filtering algorithms, tailored for this project, data type and terrain type, are applied to the full dataset. The ground filtered dataset is then visually checked by an operator, and incorrectly classified data is corrected or the ground filtering algorithm is adjusted and then visually checked. For the verification of the ground classifications, intensity imagery is used as a backdrop image. Classified Point Cloud with automatically classified buildings The full LiDAR point cloud, consisting of ground, automatically classified buildings and the rest of the point cloud, in LAS file format. Bare Earth DEM A 1m DEM has been generated from the lidar ground surface. The method of deriving the height for each grid point is by triangulation between the three nearest lidar ground points. Contours From the model keypoints, triangles are built. At 25cm intervals in height, points or interpolated points on triangle edges with the same height are connected using smoothed curved lines. The lines for each height interval are then merged to become the final contours. Note: Returns on water have not been removed from the (classified) point clouds. Gridded datasets have been interpolated across voids (up to 500m in diameter) caused by either no-return due to water bodies, or removal of buildings, vegetation or other above ground features. Contour datasets are interpolated across voids, and contours across water bodies have not been removed/clipped. All data has been cut into 1km tiles, where the file name prefix corresponds with the Upper Left coordinate of the 1km block.

Parent Information

Extents

[-19.914294, -19.579045, 146.904454, 147.572072]

Reference System

GDA94 / MGA zone 55 (EPSG:28355)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

These datasets cover approximately 980 sq km in the western sector of the Burdekin Regional Council and are part of the 2011 Lower Burdekin LiDAR capture project. This project, undertaken by Fugro Spatial Solutions 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