I'm working with a polygon feature class that has polygons of the countries in the world. After changing the projection I noticed that there was a border that appeared where the initial central meridian was located. Not only was there a "border" but I noticed that there was an actual gap between two polygons. One in Russia and another in Antarctica at 180 degrees West. I have split the polygons using the 'Explode Multipart Feature' tool so that I can edit their individual vertices. I'm now stumped on how I can combine the two polygons into one without a border.
I do NOT mean I want to use the 'Merge' tool in the Edit menu so that they share attributes. I need to combine two polygons into one shape without a border or gap. Can anyone help me? I have attached a picture showing the gap.