Definice mozaikového produktu pro DJI Mavic M3M a profily vizualizace indexů

Question

Ahoj všichni,

zaměřuji se na zjednodušení správy snímků multispektrálních dat z DJI Mavic M3M, které byly zpracovány do jednoho multibandového tif souboru. Můj nápad je načíst zpracované ortomozaiky do mozaikové datové sady podle naší jiné metodiky pro práci s těmito snímky lokací z RGB snímků, ale chtěl jsem vylepšit inteligenci při práci s multispektrálními datovými sadami. Zajímalo by mě, jestli už někdo má definici mozaikového produktu pro systém DJI Mavic M3M nebo jinou multispektrální kameru založenou na dronech?

Také jsem chtěl zjednodušit vizualizaci indexů obrazu a zajímalo by mě, jestli už někdo vytvořil šablony rastrových funkcí pro tyto indexy a jak jsou tyto převedeny na šablony zpracování a nahrány do portálu pro nový mapový prohlížeč?

Díky,

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.