A method for rating insurance products using a programmed computer system having steps including receiving a coordinate pair comprising a longitude and a latitude of a location; determining a target coordinate grid block by truncating a decimal representation of the longitude and latitude of the location; querying a database for a first set of existing data associated with the target coordinate grid block; setting a ring counter to an initial value; determining a current ring of coordinate grid blocks grid adjacent to and surrounding the target grid block; querying the database for a second set of existing data associated with each coordinate grid block in the current ring of coordinate grid blocks; and calculating a rating for an insurance product based on an analysis of the data.