iraf.net

I'm using DS9 and the 'display' task to display some large (4096x4096) solar images and an overlay that marks particular features.

When I do this:

cl\$this->_split2($m[0]) displ image.fits 1 overlay="image.plot" ocolor="red" zs- zr+ fi+

Where 'image.plot' is a list of x, y coordinates (separated by white space), I see the red overlay. But if I do this:

cl\$this->_split2($m[0]) displ image.fits[3276:3787,1780:2291] 1 overlay="image.plot" ocolor="red" zs- zr+ fi+

The overlay doesn't appear on my "zoomed in" image (whether fi- or fi+).

It's been too long since I've done this kind of thing, so I don't remember if this is possible.

Any suggestions?

TIA and Peace,
Cosmic

Have a look at the TVMARK task and set the 'coords' parameter, the DISPLAY 'overlay' parameter is intended to be a pixel mask (i.e. ,pl extension)

Yep -- I knew I'd forgotten about tvmark. Great! Thanks again.

Peace,
CL