Merging small polygons with biggest adjacent polygon using ArcGIS Desktop?

Discussion created by jmonrealnunez on Jul 21, 2018
Latest reply on Jul 24, 2018 by jmonrealnunez
I have a polygon shapefile classifieds in different regions, and cities inside them. In each city there are many small polygons <2ha, that I'd like to merge to the biggest polygon adjacent to each one of them, as long as these polygons belong to the same city and region.

I don't want that polygons neighbors located in different city and region be united.

I'm looking for an automatic solution. I tried eliminate tools but ArcGIS does not differentiate the union between cities and regions.

Any ideas?