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Data Management
Murray-Darling Basin Authority
Spatial Data
1800 630 114 (free call)
GPO Box 1801
Canberra
ACT
2601
AU
gis@mdba.gov.au
Data Management
Murray-Darling Basin Authority
Spatial Data
1800 630 114 (free call)
GPO Box 1801
Canberra
ACT
2601
AU
gis@mdba.gov.au
Macquarie Barwon LiDAR survey provides elevation and photographic data over approximately 17,326 km along the Macquarie and Barwon Rivers, north-west of Dubbo
The Macquarie Barwon LiDAR survey provides elevation and photographic data over approximately 17,326 km along the Macquarie and Barwon Rivers, north-west of Dubbo NSW. The LiDAR was captured between November 2013 and May 2014, at a nominal density of two outgoing laser pulses per square metre. Photography was captured simultaneously and provided as an ortho-rectified mosaic with a resolution of 20cm. The LiDAR was delivered in a full waveform format that retains a higher level of precision and significantly more above ground information than traditional LiDAR. A set of seamless products, including hydro-flattened bare earth terrain surfaces (DEMs), were produced to the ICSM specification. Other derived surfaces include a Digital Surface Model (DSM), Canopy Height Model (CHM) and Foliage Canopy Model (FCM). The outputs of the project are compliant with National ICSM LiDAR Product Specifications and the NEDF. NEDF MetadataAcquisition Start Date: Saturday, 2 November 2013Acquisition End Date: Thursday, 8 May 2014Sensor: LiDARDevice Name: Trimble Harrier 68iFlying Height (AGL): 1020INS/IMU Used: H68: POSAV 410 ? IMU14Number of Runs: 1692Number of Cross Runs: 150Swath Width: 742Flight Direction: UNKSwath (side) Overlap: 10Horizontal Datum: GDA94Vertical Datum: AHD71 ? using local Geoid modelMap Projection: MGA55Description of Aerotriangulation Process Used: UNKDescription of Rectification Process Used: UNKSpatial Accuracy Horizontal: 0.8Spatial Accuracy Vertical: 0.3Average Point Spacing (per/sqm): 2.39Laser Return Types: 4 pulses (1st 2nd 3rd 4th and intensity)Data Thinning: UNKLaser Footprint Size: 0.51Calibration certification (Manufacturer/Cert. Company): Trimble H68_017 and H68_038Limitations of the Data: 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 some minor error due to ground point misclassification.Surface Type: DEMProduct Type: GRIDClassification Type: C2Grid Resolution: 1Distribution Format: ESRI GRIDProcessing/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 for all 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.
Murray Darling Basin Authority (MDBA)
GA
Elevation
DEM
Macquarie
Barwon
SFA701
Creative Commons Attribution 3.0 Australia (CC BY 3.0AU) https://creativecommons.org/licenses/by/3.0/au
Creative Commons Attribution 3.0 Australia (CC BY 3.0AU) https://creativecommons.org/licenses/by/3.0/au
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
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