Change any of the Basemaps to grayscale?

[NicholasLiccini]

Hi!

I'd like to be able to change the ArcGIS basemaps to be grayscale so that it is easier to see graphics drawn on there. I'm aware of the lightGrayCanvas basemap, but I'd also like to have the imagery basemap be grayscaled. Is this possible?

Thank you!

[LucasDanzinger · Accepted solution]

You can modify the brightness, contrast, and gamma on the client side, as ArcGISTiledLayer inherits from ImageAdjustmentLayer - ImageAdjustmentLayer QML Type | ArcGIS for Developers 

You would need to loop through the layers in your Basemap, and apply the values that you want to each of the layers in the Basemap. Maybe you can combine these properties to get an output that is to your liking.