If you've been playing Screeps for a while, chances are you're already collecting intel about your neighborhood (resources, enemies, etc). renderIntelMap
uses RoomVisual
to display common info you're probably collecting.
Click on the image below to watch the demo, because like the old Chinese proverb says, "a video is worth 60.000 words per second".
For more details, RTFM read the JsDoc.