Data

Uncrewed Aircraft System (UAS)/drone RGB and multispectral orthomosaic and raw data - Calperum SASMDD0002 - May 2022

Terrestrial Ecosystem Research Network
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Brief description

This dataset contains UAS RGB and multispectral raw images and orthomosaics of Calperum plot SASMDD0002. The drone platform used was DJI Matrice 300 (M300) RTK. Two sensors were flown simultaneously: Zenmuse P1 (35 mm) RGB mapping camera and MicaSense RedEdge-MX Dual (10-band multispectral sensor). The RGB images were geo-referenced using the onboard GNSS in M300 and the D-RTK 2 base station. In the processing workflow, the multispectral image positions (captured with navigation-grade accuracy) were interpolated using image timestamp and RGB image coordinates. Dense point clouds and the fine-resolution RGB smoothed surface were used to generate both the RGB (1 cm/pixel) and multispectral (5 cm/pixel) orthomosaics. rio-cogeo plugin was used to generate Cloud Optimised GeoTIFFs.

Details of the data collection settings and processing workflow are described in further sections.

Note on multispectral data: in the raw data image file suffixes correspond to bands - 1: Blue, 2: Green, 3: Red, 4: NIR, 5: Red Edge, 6: Coastal Blue, 7: Green 531, 8: Red 650, 9: RedEdge 705, 10: RedEdge 740. In the orthomosaic, the bands (1-10) are ordered by the Central Wavelength (Coastal Blue, Blue, Green 531, Green, Red 650, Red, RedEdge 705, RedEdge, RedEdge 740, NIR).

Lineage

Data collection: - Flight parameters * Flight altitude (m): 80 * Flight speed (m/s): 9.5 * Forward and side overlaps (%): 80 * Target Surface to Takeoff Point (m): 10 * Margin (m): 50 - Camera/sensor settings * Zenmuse P1 - M mode, Auto ISO, Aperture: f/5.6, Shutter speed: 1/1000 s, White Balance: Sunny * MicaSense - Capture mode: Timer, Interval (s): 1, Target Altitude (m): 80, Target Altitude Threshold (m): 20, Manual Exposure: disable - DRTK-2 base station location on plot: South West corner - Clouds/Wind conditions: Sunny, light breeze Data processing: P1 RGB imagery were geo-referenced using the onboard GNSS in M300 and the D-RTK 2 Mobile Station. MicaSense image positions (navigation grade accuracy) were interpolated using image timestamp and RGB image coordinates. Images were processed in Agisoft Metashape. MicaSense Calibrated Reflectance Panel (CRP) images were used to calibrate reflectance. Dense point clouds and the fine-resolution RGB smoothed surface were used to generate both the RGB (1 cm/pixel) and multispectral (5 cm/pixel) orthomosaics. rio-cogeo plugin was used to generate Cloud Optimised GeoTIFFs. These steps are documented in the following documents: Matrice 300 RTK UAS RGB and Multispectral Data Collection Protocol, Matrice 300 RTK UAS RGB and Multispectral Data Processing Protocol.

Notes

Credit
We at TERN acknowledge the Traditional Owners and Custodians throughout Australia, New Zealand and all nations. We honour their profound connections to land, water, biodiversity and culture and pay our respects to their Elders past, present and emerging.
Purpose
This data was collected as part of a regular drone field survey by the TERN Ecosystem Surveillance team in collaboration with UTAS. Data collection settings for the M300 drone system were refined through this field campaign.

Created: 2022-05-19

Issued: 2022-08-22

Modified: 2014-07-14

Data time period: 2022-05-19 to 2022-05-19

140.59413,-34.0119 140.59413,-34.0105 140.59243,-34.0105 140.59243,-34.0119 140.59413,-34.0119

140.59327995017,-34.011200422071