how to remove silvers and gaps after merging into one polygon ArcGIS

Question

I want to merge multiple zip code areas into one polygon in arcgis desktop. After merged, there are multiple silvers and lines within this polygon. I tried to use "Eliminate" tool to remove the silvers and lines but didn't work.

Is there anyone knowing why this happened and how to solve this issue?

Really appreciate your help!

Thanks,

Shuhong

example.png

llyn_dinas_1938.png

DanPatterson_Retired · Answer

if they are inside... Eliminate Polygon Part—Data Management toolbox | ArcGIS Desktop

on a copy first of course