Analysis with a Living Atlas Raster layer

Question

Hello

I am trying to work with a raster layer pulled from the Living Atlas and running into some trouble. The layer is the Global Forest Watch Tree Cover 2000 layer which gives you a percent forest cover at a 30m resolution. I am trying to see if I can threshold (above x%) and clip the layer for a subset of polygons.  If I load the layer into a map and click on a cell, I do see the precent forest cover as the Item Pixel Value in the pop-up, but it also appears as a 3 band raster in the TOC.

When working with these data in ArcGIS Pro I notice that if I open the attribute table it looks more like a polygon attribute table rather than a VAT.  I am guessing this is because of the way the raster layer is shared in the Living Atlas, but I am not sure.  When I run a Clip Raster on this layer, the output raster only has RGB values and I lose the % forest cover value.  I can't seem to run any thresholding tool, such as a CON, because I cannot see the % forest cover value when trying to create an expression.

So I am  hoping someone can give me a few pointers to working with this type of raster layer and suggesitons as to how to extract a subset of information.

I have included some images of the attribute table for the original layer, the pop-up for the original layer, and the pop-up after a clip raster tool was run.

Thanks

tree cover pop-up after clip.png

raster VAT.png

tree cover percent.png

emazon_foto.jpg

AssociazioneTerras_0-1663234864420.png

Clip_184.jpg

RobertRose · Answer

Thanks so much.  That did it.

RobertRose · Answer

Thanks Mervyn.  I am going to try the Make Image Server Layer gp tool.

MervynLotter · Answer

Hi Rob

To access the raw pixel values, you need to remove the Processing Template. Click on the layer under contents pane then go to Imagery Service Layer > Data the under the Processing group, click on the Processing Template drop down and select None (as in below screenshot).

The raw values will be loaded and available for use.

I am not sure whether you make use of the Make Image Server Layer gp tool, but it is a great way for working with online imagery. You can set the desired extent, projection (under Environments) and cell size for use in your analysis. Just one point to add if you are not familiar with it, you need to copy and paste in the url for the image service. Just right-click on the image service under Contents pane then select Properties > Data Source to get the url.

Make sure to specify the None under Processing Template and band 1 under Bands.

Mervyn