Abstract: A system and corresponding methodology for displaying in real-time geographical and situational details on-site underneath a conveyed or preselected region displayed on a web mapping service, wherein these geographical and situational details include information that is overlaid over top the conveyed or preselected region on the web map. The system can be used to formulate and implement incident/emergency response by providing knowledge under a plume, and/or can also be used to display entity information under a selected region for audit/maintenance purposes.