1. A method of associating information with a digital map comprising: extracting at least one local identifier from at least one image, the at least one image also having positional data; and determining the location of each of the at least one extracted local identifier using the positional data of the corresponding image; creating at least one cluster of common or similar extracted local identifiers based on at least one of: (i) the distance of the extracted local identifiers from each other; and (ii) the distance of the extracted local identifiers from one or more segments of the digital map; and associating the at least one cluster with at least one segment of the digital map.