The inlay pattern consists in placing a piece of content (image, text, video) directly on top of a map. Neatline http://www.nytimes.com/newsgraphics/2013/10/27/south-china-sea/
L.H Oswald USSR citizenship request letter
In this example, several items are placed on the map: a label that indicates the chapter title, "Lee's defection", a label locating the city of New Orleans, a letter and an explanation box. The user understands implicitely that the letter was written by Oswald from the mentioned city, New Orleans.