http://blogs.esri.com/Support/blogs/mappingcenter/archive/2008/03/04/cartographic-design-inset-maps.aspxRecently we were asked if there are any cartographic standards for inset maps. Here are a few guidelines: Purpose First, consider why the inset map is needed . Inset maps are sometimes used to show related themes of data at smaller scales, for exampleenCommunityServer 2.1 SP2 (Debug Build: 61120.2)