Hi Nigel, A quick answer is to use ET Geowizards tool (Polygons to Max Inscribed Circles). Version 11.3 is out (I am currently using 11.2); http://www.ian-ko.com/ Overall, it is a helpful program and relatively inexpensive. -M [cid:[log in to unmask]] --- Matthew J. Mayo, M.S., GISP, CPG, P.G. | 617-395-5597 From: Northeast Arc Users Group [mailto:[log in to unmask]] On Behalf Of Nigel Pickering Sent: Saturday, October 01, 2016 8:12 AM To: [log in to unmask] Subject: Circles in polygons Is there a way to automate creating a single maximum-sized circle within each polygon of a parcel layer? The polygons could be any shape. This would be useful for identifying potential parcels that could contain a Massachusetts Zone I (400' radius) of a proposed water supply well. Nigel ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://s.uconn.edu/nearcsubscribe. ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://s.uconn.edu/nearcsubscribe.