Identify clouds

ModyBuchbinder — Mon, 25 Mar 2019 07:26:47 GMT

Hello all

I have many images on top of each other.

I would like to identify clouds in a new images, create a polygon around the cloud and make a hole in the boundary of the mosaic.

This way I can see the mosaic below where there are cloud in the top mosaic.

I tried to create an ecd file with the cloud signature, then use it in the classify GP tool.

Then I turn it to polygon and add it to the mosaic boundary.

The problem I am running into is that when the ecd file has one class only all the raster fall into this class.

I need to create "all other" class that will include all the pixel that does not match the first class.

Currently if I add one more class (two polygons in the layer that is used to create the ecd) many areas are a little closer to the cloud signature then the other signature and then identified as cloud.

One solution is to have many classes on different areas and then ignore all other classes in the result other then the cloud class but this is not very elegant.

What is the correct way to do it?

topic Identify clouds in ArcGIS Spatial Analyst Questions

Identify clouds