Indiana University
University Information Technology Services
What are archived documents?

Login is for authorized groups (e.g., UITS, OVPIT, and TCC) that need access to specialized Knowledge Base documents. Otherwise, simply use the Knowledge Base without logging in.


In ArcGIS, how do I create an island polygon?

Sometimes you need to create a polygon with a hole in it, or even a polygon with both a hole and an interior polygon. To create these kinds of polygons, you need to create a multipart feature. When you create a polygon with an island inside it, the outer and inner areas are all one feature. This means that clicking either polygon will select both of them, and the attributes of the feature are stored in just one row in a table. Donut polygons are commonly used with administrative boundaries. For example, a city may have unincorporated areas within its limits.

For more about editing polygons, see Creating adjoining polygons from ArcGIS Resources. For more about editing polygons with holes, see Creating new donut holes and island polygons, also from ArcGIS Resources.

The information in this document was adapted from the ArcGIS Help 10.1 article Creating new donut holes and island polygons.

This is document ancm in domain all.
Last modified on March 06, 2013.

I need help with a computing problem

  • Fill out this form to submit your issue to the UITS Support Center.
  • Please note that you must be affiliated with Indiana University to receive support.
  • All fields are required.

Please provide your IU email address. If you currently have a problem receiving email at your IU account, enter an alternate email address.

I have a comment for the Knowledge Base

  • Fill out this form to submit your comment to the IU Knowledge Base.
  • If you are affiliated with Indiana University and need help with a computing problem, please use the I need help with a computing problem section above, or contact your campus Support Center.