I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching.

How can I have the polygons snap together, removing the spaces?

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching.

How can I have the polygons snap together, removing the spaces?

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching.

How can I have the polygons snap together, removing the spaces?

QGIS preferred, but ArcGIS and general programming are also options.

I have a set of polygons representing administrative districts. The districts were digitized by hand, and there are small spaces (slivers) between polygons where the polygons should be touching.

How can I have the polygons snap together, removing the spaces?