I know it's been a while but I personally think that reclassifying and converting the raster to polygon can be waaaaay too time consuming. In my opinion, the easiest way to do it is:

Get maxX, maxY, minX, minY (this can be done in Python with the describe command) Run Create Fishnet with the extent as above and number of rows/columns as 1

If you have lots of rasters, this should be done in Python and can create hundreds of footprints in a matter of seconds.

I think that reclassifying and converting the raster to polygon can be way too time consuming. In my opinion, the easiest way to do it is:

• Get maxX, maxY, minX, minY (this can be done in Python with the describe command)
• Run Create Fishnet with the extent as above and number of rows/columns as 1

If you have lots of rasters, this should be done in Python and can create hundreds of footprints in a matter of seconds.