I would like to contribute my small contribution to complete your good list: It is an illustration of a map somewhat peculiar in vector format (EPS), meeting in VECTEEZY . Here is the link to download .
Initially silhouette was applied on portraits or pictorial which were be used for thin black card. But nowadays, we can easily find silhouette images in many media forms like artworks, illustration, photography, movies, graphic design or even fashion and fitness. Modern designers use silhouette to create dramatic effect in many art works because silhouette emphasizes the outline and view of an object.