with “a-tag” im just referring to a regular anchor.
You could put a hmtl field at the end of the repeater-row with:
<a href="#" class="open-imglatlon">Set image coordinates</a>
and then in your javascript you trigger the popup when user clicks open-imglatlon
$('.open-imglatlon').click(function(e){
e.preventDefault(); //this prevents regular link-click.
});