Geocoding in a Network Data Model
Geocoding is possible if a linear referencing system is embedded in a network data model. One of the most common linear referencing systems is the address system, where each link has a corresponding street name and address range. The above address range illustrates even (right side) and odd (left side) addresses, very common attributes in most network data models such as TIGER (developed by the US Census Bureau). For instance, finding the approximate location of the address "197 East Ave." would first imply querying the network data model to find all the links that have "East Ave." as a name attribute. Then, the appropriate address range is found and the location interpolated. "197" corresponds to the 191-209 address range, located on the left side of East Ave. Its approximate location would be at 1/3 [1 - (209-197) / (209-191)] of the length of the link that has the 191-209 address range. The same procedure can be applied to the "188 East Ave." address, which in this case would be located at 1/4 of the length of the link that has the 172-210 address range.