Who can use this feature
Editors of a project within a Pro + workspace.
While standard cameras capture data from red, green, and blue (RGB) colours (just like our eyes), multispectral sensors capture data in additional wavelengths as 'bands' or 'layers'. Making measurements from light beyond which our eyes can see is remote sensing's 'superpower'. It's used in all sorts of applications including agriculture, forestry, fire management, weed detection, mineral identification, and habitat monitoring.
For more information about multispectral imaging, read on here.
What is the best way to upload multispectral data?
We recommend starting a new project, or opening an existing one and simply dragging your folder/s of data into the project.
Often you will have a sequence of RGB images, and then each of the multispectral images will have its own file. The RGB images will look like 'normal' photos while the multispectral images will be in greyscale.
Make sure that you upload all of your images together as a single dataset. Don't separate out the RGB, and don't upload individual bands separately.
How are multispectral data processed on GeoNadir?
As soon as you upload geotagged images to GeoNadir, they will automatically be pushed through our processing pipeline.
Usually the RGB sensor has a higher spatial resolution than the multispectral ones. So we use these data to generate the DSM and DTM, as well as the RGB orthomosaic.
The multispectral layers will then be processed together to create the multispectral orthomosaic. As above, it's important that you upload these together, not as separate datasets. When uploaded together, we are able to calibrate for offsets in each sensor location and your layers will line up properly.
What multispectral sensors are compatible?
We are sensor agnostic! As long as your camera is capturing overlapping geotagged images, we can process them. We most commonly see data from the DJI Mavic 3 enterprise multispectral, Micasense, and Sequoia cameras.
Can I download the processed data?
Absolutely! Once the data processing is complete, you will have the option to download the original images, RGB orthomosaic, multispectral orthomosaic, DSM, and DTM.
Can I use multispectral data in other software?
Most definitely. There are many powerful analytical tools available for analyzing multispectral data, and doing justice to the money you spent purchasing the camera! You will first need to download your data (as above) before opening in your favorite software. We like using ENVI, QGIS, and ArcGIS Pro.