Correlation Between Measured Wideband Ratio-Frequency Electromagnetic Radiation and the Area of Buildings

In order to estimate electromagnetic radiation (EM-R) levels from geographical data, the correlation between wideband ratio-frequency electric field strength and the area of surrounding buildings is investigated in this paper. EMR measurements were conducted at 60 locations on various roads in Beijing, and the area of buildings up to a distance of 600 m from each measurement location were extracted from the map. Correlation coefficients are derived as a function of the distance. It is shown that the EMR level has a positive correlation with the area of surrounding buildings, and the correlation is maximal at distances up to 400–500 m from the measurement location. Furthermore, the regression line between the EMR level and the building area is calculated. The result shows that the EMR level could be estimated from the area of buildings within 500 m, and buildings in the annulus 400–500 m have a dominant influence on the level.