Bunbury 2008 LiDAR  

Authors / CoAuthors

Abstract

The Bunbury 2008 LiDAR data was captured over the Bunbury region during February, 2008. The data was acquired by AAMHatch (now AAMGroup) and Fugro Spatial Solutions through a number of separate missions as part of the larger Swan Coast LiDAR Survey that covers the regions of Perth, Peel, Harvey, Bunbury and Busselton. The project was funded by Department of Water, WA for the purposes of coastal inundation modelling and a range of local and regional planning. The data are made available under licence for use by Commonwealth, State and Local Government. The data was captured with point density of 1 point per square metre and overall vertical accuracy has been confirmed at <15cm (68% confidence). The data are available as a number of products including mass point files (ASCII, LAS) and ESRI GRID files with 1m grid spacing. A 2m posting hydrologically enforced digital elevation model (HDEM) and inundation contours has also been derived for low lying coastal areas.

Product Type

dataset

eCat Id

70829

Contact for the resource

Keywords

• DEM topographic

( Theme )

• DEM

( Theme )

• digital elevation data

• AU-WA

Australian and New Zealand Standard Research Classification (ANZSRC)

• Topology

• Published_Internal

Publication Date

2008-01-01T00:00:00

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

The data were acquired with fixed wing aircraft. GPS base station support was provided the the Perth GPS Network. Reduction of the LiDAR data to the Australian Height Datum proceeded without any significant problems. The laser strikes were classified into ground and non-ground points using automated processing. Manual checking and editing of the data classification further improved the quality of the terrain data. Ground strikes were further thinned to remove superfluous points not adding to the terrain definition. Non-ground strikes that were within 0.5m of the ground were filtered out. The 1m gridded DEM was produced from the thinned ground model. The 1m grid representing the non-ground was produced using the non-ground surface model of the points that were 0.5m above the ground. Gaps in the grids were interpolated. The Laser in use for this project is absorbed by water, so no water features or features below the water are picked up. This meant additional processing where the ground level was distorted due to nearby features, but water features were set a level based on the surrounding land. NEDF Metadata Acquisition Start Date: Monday, 25 February 2008 Acquisition End Date: Monday, 25 February 2008 Sensor: LiDAR Device Name: Leica ALS50-II (S/N: 091) Flying Height (AGL): 2170 INS/IMU Used: Unknown Number of Runs: UNK Number of Cross Runs: UNK Swath Width: UNK Flight Direction: UNK Swath (side) Overlap: UNK Horizontal Datum: GDA94 Vertical Datum: AHD71 - using local Geoid model Map Projection: MGA50 Description of Aerotriangulation Process Used: - Description of Rectification Process Used: - Spatial Accuracy Horizontal: UNK Spatial Accuracy Vertical: 0.15 Average Point Spacing (per/sqm): 1 Laser Return Types: 4 pulses (1st 2nd 3rd 4th and intensity) Data Thinning: - Laser Footprint Size: 0 Calibration certification (Manufacturer/Cert. Company): Fugro Spatial Solutions Pty Ltd Limitations of the Data: Incomplete metadata supplied Surface Type: DEM Product Type: GRID Classification Type: C2 Grid Resolution: 1 Distribution Format: ESRI GRID Processing/Derivation Lineage: Fugro Spatial Solutions Pty Ltd WMS: http://nedf.ga.gov.au:8399/arcgis/services/Bunbury_2008/MapServer/WMSServer?

Parent Information

Extents

[-33.433679, -31.752688, 115.587823, 115.897277]

Reference System

GDA94 (EPSG:4283)

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

Bunbury 2008 LiDAR