Seven analytical layers covering vegetation health, canopy stress, multispectral indices and environmental conditions.
The wetland surface rebuilt from the drone's multispectral frames, with seven analytical layers: false-colour infrared, NDVI, NDRE and each of the four bands. Switch the display to see the same canopy as false-colour infrared, NDVI, NDRE or a single band.
What the multispectral flight tells us about the wetland, in plain language. Each finding links to the evidence.
Each analysed frame as colour-infrared, NDVI, cover classes and canopy-stress pockets, with the cover split and vegetation indices measured on that frame.
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What a multispectral wetland flight is for, who pays for it, and which measurement on this page answers their question.
Sites like Carter Street, 2.8 km away, carry conditions to protect downstream wetlands from sediment and dust. A baseline flight before works and repeats during them turn "no harm" from an assertion into measured canopy vigour, stress and cover that regulators and neighbours can see.
Measures used: NDVI and NDRE trend, stress pockets, bare mud and open water extent.
Mangrove dieback and saltmarsh retreat start as chlorophyll loss, which NDRE shows weeks before crowns thin in a colour photo. A flight each season gives a per-frame trend, and the stress map says where to walk in.
Measures used: NDRE pockets per frame, cover split, median NDVI of dense canopy.
Planted mangrove and saltmarsh must be shown to establish and persist. The cover classes count living cover against mud and water in each frame, and vigour indices show whether it is thriving or just surviving.
Measures used: saltmarsh and canopy share, NDVI by class, change between flights.
Organisations reporting under nature-related frameworks, and insurers of assets near wetlands, need quantified condition rather than photographs. A repeatable index baseline on a fixed flight plan is the kind of number that can be audited.
Measures used: the whole-flight cover split and index medians, with the capture notes on data quality.
After a storm or a spill, the question is what changed and where. Flying the same plan again and differencing NDVI, NDRE and the cover classes against this baseline localises damage to frames and areas, before field crews are sent.
Measures used: per-frame indices and cover split as the "before".
The DJI Mavic 3M records the multispectral bands on every flight, so a construction survey and its receiving-environment check can be one job. The yard gets stockpiles and plant; the wetland gets vigour and cover.
How the capture and the display were made, and what the numbers can and cannot be used for.
A single surface mesh shared by every display; only the vertex colours change, so switching displays is instant once the model has loaded. Indices use the drone's calibrated bands; single bands use a 2–98% contrast stretch.