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I have brought two graphics, a species range and a heatmap, into a dataframe and georeferenced them using control points. I rectified them and now I want to clip one with the other but I can't get them converted to features because that function is grayed out. So what I think is a graphic is not? When I open the clip tool it doesn't show these layers because, I assume, ArcMap thinks they are not features? Thanks, Steve

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Probably you mean Clip for vector layers from Analysis toolbar (but its only assumption). Try to clip them with Clip from Management/Raster toolbox or Extract by Mask from Spatial Analyst. – Tomek Oct 23 '12 at 19:17
Tomek, thanks for the suggestions Clip under Analysis Tools doesn't offer either layer as selectable. I tried clip under Data Management and I think it would work if I could delete, instead of make transparent, the backgrounds for both the species range and the heat map. Do you know how I can do that? I've tried about every file type that photoshop will give me that saves with a transparent background but once imported into ArcMap it has a white background. – Steve Oct 23 '12 at 20:24
Oh, and Extract by Mask I think has the same problem. – Steve Oct 23 '12 at 20:25
It was just loose suggestion. If you want your question to be answered, then attach some pictures or be more precise in writing. I'll be happy to help, also will others as long as they understand question. – Tomek Oct 23 '12 at 20:29
ArcMap uses the term "Feature" to refer to vector data. What you are dealing with is raster data. The clip tool in data management will let you 'subset' a raster image, which is what it sounds like you want to do. Like Tomek suggested, you should give us an illustrated example of what you're looking to accomplish so we can be sure to get you the right info. – egdetti Oct 23 '12 at 21:07

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