In one aspect, a map is provided for display by one or more computing devices. The map includes one or more polygons. The one or more computing devices receive a zoom request for viewing the map. The one or more computing devices then determines whether a visual threshold has been reached based at least in part on the zoom request. When the visual threshold has been reached, the one or more computing devices identify a polygon of the one or more polygons. The one or more computing devices then provide for display alternate imagery corresponding to the polygon on the map.