title: Relative accuracy of grid references derived from postcode and address in UK epidemiological studies of overhead power lines.
abstract: In the UK, the location of an address, necessary for calculating the distance to overhead power lines in epidemiological studies, is available from different sources. We assess the accuracy of each. The grid reference specific to each address, provided by the Ordnance Survey product Address-Point, is generally accurate to a few metres, which will usually be sufficient for calculating magnetic fields from the power lines. The grid reference derived from the postcode rather than the individual address is generally accurate to tens of metres, and may be acceptable for assessing effects that vary in the general proximity of the power line, but is probably not acceptable for assessing magnetic-field effects.
authors.affiliation: National Grid, 1-3 Strand, London, WC2N 5EH, UK.
authors.forename: J
authors.initials: J
authors.lastname: Swanson
authors.forename: T J
authors.initials: TJ
authors.lastname: Vincent
authors.forename: K J
authors.initials: KJ
authors.lastname: Bunch
mesh_terms: D004560:Electricity; D004574:Electromagnetic Fields; D004781:Environmental Exposure / Q000032:analysis / Q000706:statistics & numerical data*; D040362:Geographic Information Systems / Q000706:statistics & numerical data*; D062305:Geographic Mapping; D011177:Postal Service / Q000145:classification; D011210:Power Plants / Q000706:statistics & numerical data*; D011834:Radiation Monitoring / Q000379:methods* / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D006113:United Kingdom / Q000453:epidemiology