I have an area that contains one polyon for every 1/2 square mile area and these polygons are all connected. For example, if you were to take the city of New York and cover it with adjoining 1/2 square mile polygons. I want to create an outline that goes around the whole area and not each of the 1/2 mile polygons. For example, I want to create an outline of New York City which is represented by the adjoining 1/2 square mile polygons. Buffer will buffer each individual 1/2 square mile polygon - I want the outline to be around all of the 1/2 square mile polygon. Can anyone help?