LiDAR Middle Darling 2013-2014, Acquisition of LiDAR, imagery and derived products for the Middle Darling AOI  

Authors / CoAuthors

Abstract

The data covers an area of approximately 8500 sq km in the Darling river catchment area, located between Bourke, NSW and Wilcannia, NSW. A set of seamless products were produced including hydro-flattened bare earth DEMs, DSMs, Canopy Height Models (CHM) and Foliage Cover Models (FCM). The outputs of the project are compliant with National ICSM LiDAR Product Specifications and the NEDF.

Product Type

dataset

eCat Id

100239

Contact for the resource

Keywords

Australian and New Zealand Standard Research Classification: Fields of Research

• Earth Sciences

( {1} )

• HVC_144648

( {1} )

• Elevation

( {1} )

• Lidar

( {1} )

• Published_Internal

Publication Date

2017-11-09T04:49:10

Creation Date

2014-08-01T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

Purpose

Height model of the Middle Darling AOI

Maintenance Information

asNeeded

Topic Category

geoscientificInformation

Series Information

Lineage

LiDAR survey NEDF Metadata Acquisition Start Date: Sunday 02 February 2014 Acquisition End Date: Wednesday 05 March 2014 Sensor: LiDAR Device Name: IGI LM7800 (Riegl LMS-Q780) Flying Height (AGL): 1400 INS/IMU Used: IGI LM7800 (IMU-IIf) Number of Runs: 163 Number of Cross Runs: 6 Swath Width: 1617 Flight Direction: E Swath (side) Overlap: 60 Horizontal Datum: GDA94 Vertical Datum: GRS80 Map Projection: MGA55 Description of Aerotriangulation Process Used: NA Description of Rectification Process Used: NA Spatial Accuracy Horizontal: 0.300 Spatial Accuracy Vertical: 0.15 Average Point Spacing (per/sqm): 2.5 Laser Return Types: Multiple returns Data Thinning: none Laser Footprint Size: 0.35 Calibration certification (Manufacturer/Cert. Company): - Limitations of the Data: The DEM accuracy will be limited by the spatial accuracy of the LiDAR point data. Pixels upon which no LiDAR points fall are assigned from the interpolated DEM and therefore include an interpolation error. Surface Type: DEM Product Type: GRID Classification Type: C3 Grid Resolution: 1 Distribution Format: ESRI GRID Processing/Derivation Lineage: A DEM with a ground pixel spacing of one metre was generated from the LiDAR ground points. The method of deriving the height for each grid point is by triangulation between the three nearest LiDAR ground points. Hydro-flattening was applied using waterlines (break lines) that were manually digitised using the LiDAR and ortho photography as reference. Hydro-flattening was undertaken for any visible water in any part of a connected river network or recognised waterway (regardless of size) and all other waterbodies greater than 625 m2. The DEM was exported to ESRI Binary grid as 1km by 1km tiles in accordance with ICSM specifications (December 2012). The DEM accuracy will be limited by the spatial accuracy of the LiDAR point data and will contain some additional error due to interpolation, particularly in areas of dense vegetation where ground points are sparse. There may also be a small amount of error due to ground point misclassification.

Parent Information

Extents

[-31.554799, -29.730763, 143.026542, 145.46955]

Reference System

GDA94 / MGA zone 54 (EPSG:28354)

Spatial Resolution

1 Metre

Service Information

Associations

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