Description: This is a detailed map of the city Grand Ridge in Jackson County, Florida. Section Township Range (STR) is shown. This map shows US highways, state roads, inland waters, railroads, businesses, churches, a school, a sawmill, turpentine still, a post office, farm units and dwellings other than farms. Key to Florida Highway maps. Source: , Florida State Road Department (, FL: , 1940) Map Credit: Courtesy the private collection of Roy Winkelman.