A method for rating insurance products using a programmed computer system comprising receiving a coordinate pair including a longitude and a latitude of a location; determining a target coordinate grid block bounded by latitude and longitude lines, wherein the target coordinate grid block encompasses the coordinate pair, querying a database for a target set of existing data associated with the target coordinate grid block, wherein the existing data was associated with the target coordinate grid block prior to receiving the coordinate pair, and calculating a pure premium based at least in part on analyzing the data in the target set.