1. A computer-executable method performed by a computer system, the method comprising: receiving a plurality of scenarios from one or more data sources, wherein the plurality of scenarios represent different scenarios for a same property; calculating first chance maps based on the plurality of scenarios using a transform; merging the first chance maps into a second chance map; dynamically linking the plurality of scenarios to the second chance map; and updating the second chance map in real time when a change occurs in at least one of the plurality of scenarios.