Hi, I am wondering if there is a way/tool in which I can merge/dissolve a large polygon with another large polygon while preserving smaller polygons contained within the large polygons. Note the seam between the two polygons on the screenshot below. [ATTACH=CONFIG]31896[/ATTACH]
Do you want to remove the seam? If so, use Dissolve (it needs some attribute to tell it what polygons to dissolve together). If not, use Merge. If you've tried those we need more information - what are you trying, what is happening, and what do you want to happen?