On Friday 30 October 2015, Maps & Grammar postdoc Erik Tjong Kim Sang presented his paper Voronoi Diagrams without Boundary Boxes at the Joint International Geoinformation Conference (JIGC) 2015 in Kuala Lumpur in Malaysia. The paper describes a technical feature which he implemented in the dialect mapping tool Arvid: a method for drawing arbitrary dialect maps without requiring the user to define boundaries for the regions that are being studied. The talk elicited several questions, about data collection methods, data interpretation, storing audio interviews and dealing with transition zones. PDFs are available of the paper and the slides of the talk. Further comments are welcome.