Définition du produit mosaïque pour DJI Mavic M3M et profils de visualisation des indices

Question

Bonjour à tous,

Je cherche à rationaliser la gestion des images multispectrales provenant d'un DJI Mavic M3M qui ont été traitées en un seul tif multibande. Je pense charger les orthomosaïques traitées dans un jeu de données mosaïque selon notre autre méthodologie pour gérer ces captures de site à partir d'images RGB, mais je voulais améliorer l'intelligence lors du traitement des ensembles de données multispectrales. Je me demandais si quelqu'un dispose déjà d'une définition de produit mosaïque pour un système DJI Mavic M3M ou une autre caméra multispectrale basée sur drone ?

Je cherchais également à simplifier la visualisation des indices d'image et je me demandais si quelqu'un avait déjà créé les modèles de fonction raster pour ceux-ci et comment ils sont convertis en modèles de traitement et téléchargés sur le portail pour le nouveau visualiseur de cartes ?

Merci,

JamesHead-Mears1 · Answer

Thank you for your reply Peter but that doesn't actually seem to work for me. I have an 8 band MS imagery with the following band profile:

1 Red

2 Green

3 Blue

4 Green Narrow

5 Red Narrow

6 Red Edge

7 NIR

8 Alpha

When I load just an individual tif into Pro it is displayed correctly. However, if I add this to a mosaic with the default profile it shows only black & white image. Is there any reason this would be happening?

I've tried editing the Processing Template to only extract the first 3 bands into the mosaic and it doesn't seem to work either. Is there a trick to defining the import datasets in a template?

PeterBecker · Answer

There is no specific product for the M3M. As the image is pre-processed as a 4band ortho you can create a new mosaic dataset (with default parameters) and then add the Multispectral imagery it should add appropriately. It will take properties of the first image added. Alternatively can set the number of bands etc first. Prior to adding the image you will want to ensure it has pyramids which will speed up access. Alternatively convert it to a cloud optimized format such as CRF (or COG or MRF).  Once added you should be able to see and set raster functions.  The link provides documentation on the default and custom raster functions.. My recommendation would be to add a "AcquisitionDate" field to the mosaic dataset and define the data for this and subsequent images you add to the mosaic dataset. This will simplify a range of temporal tasks such as change detection. The mosaic dataset can also be published to ArcGIS Image Server. You could publish the mosaic dataset to ArcGIS Online.

An alternative workflow would be to directly load the image to ArcGIS Online as tiled imagery. Group the images from multiple dates into a folder in ArcGIS Online. Then look to create a catalog layer that provides a single access point to the images from different dates.

In both cases there are many raster function template as defaults and ones you can access from ArcGIS Online or use the raster function editor to create your own.