The data also show short-term effects of rain and hail. Practical geologic CO sink-source relationship and vegetation density. Multi-Spectral imaging of vegetation for detecting CO2 leaking from undergroundĭOE Office of Scientific and Technical Information (OSTI.GOV) The WET-Health vegetation module completed with the aid of the multispectral UAV products indicated that the vegetation of the wetland is largely modified ("D" PES Category) and that the condition is expected to Disturbance classes were then mapped using the high resolution multispectral orthoimages and NDVI. An on-site evaluation of the vegetation integrity was first completed. The WET-Health level one methodology was followed for the vegetation assessment, where wetland health is a measure of the deviation of a wetland's structure and function from its natural reference condition. MicaSense Atlas cloud-based data platform, Pix4D and PhotoScan were utilised for the processing. Structure-from-motion photogrammetry software was used to reconstruct the camera position's and terrain features to derive a high resolution orthoretified mosaic. A single surveying campaign was undertaken in early autumn of a 17 ha study area at the Kameelzynkraal farm, Gauteng Province, South Africa. A JAG-M fixed-wing imaging system equipped with a MicaScene RedEdge multispectral camera were utilised for the survey. The advantages and disadvantages we experienced of these applications are also shortly presented in this paper. Furthermore, we tested different software applications for the processing of the imagery. Specifically, NDVI derived from multispectral UAV imagery was used to inform the determination of the integrity of the wetland vegetation. Here, we evaluate the performance of low altitude multispectral UAV imagery to determine the state of wetland vegetation in a localised spatial area. Applications of these sensors for mapping of wetland ecosystems are rare. The focus on the usage of these sensors is mostly directed towards the agricultural sector where the focus is on precision farming. ![]() The use of multispectral sensors on Unmanned Aerial Vehicles (UAVs) was until recently too heavy and bulky although this changed in recent times and they are now commercially available. Wetland Vegetation Integrity Assessment with Low Altitude Multispectral Uav Imagery
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