It may be necessary to conduct fieldwork to compile an accurate geographic base. Staff can be employed to travel around a jurisdiction to ascertain whether addresses listed from the geographic database are accurate, and to identify any missing addresses. The results from the fieldwork can then be entered into the geographic database. After a geographic base has been established, it will need ongoing maintenance and administration. The data held in a geographic base will need to be updated regularly, as new dwellings are built and old ones demolished.
Addresses also change when houses, flats or apartments are subdivided or added to.
An EMB will need to keep abreast of changes to addresses by receiving details of changes from responsible Government authorities where possible. In some cases, the first notice an EMB will receive of a new address might be when a voter attempts to register for the address. In these cases the EMB should investigate the accuracy of the claimed address and attempt to verify it with the appropriate authority. Geo Coding and Geo Referencing Every 'spot on the Earth' can be defined in terms of geographic code, or 'geo code' or 'geo reference'. The most common such geo code is latitude and longitude.