Is there a way to trim a geo-referenced air photo to an irregularly shaped boundary?
I tried the clip tool shown in my attachment, but it didn't work. It looks as though the output extent field requires a rectangularly shaped polygon as the clipping feature.
Can I even do this in ArcView?
I've never had a request to do anything like this before.
I do use Photoshop and other similar software packages. I could just go in to an environment like this & start painting everything outside of my boundary in white, but then I would have to come back in and geo-reference the image again, and it just strikes me that there must be a faster and easier way (even though I only have ArcView 9.3).
Answer
You can clip a raster to an irregularly shaped polygon (following the polygons geometry) using the tool you tried before, Clip.
Scrolling down a little further in your screenshot, click the checkmark to enable Clipping Geometry (see image). You should have this available at v9.3; This screen is from 9.3.1
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