Radius and Corridor samples
Radius and Corridor samples offer a more specialized approach and are geometric in nature.
Radius samples
The radius sampling method provides a sample of listed phone records, randomly selected from Postal codes or Zip Codes whose centroids are located within a specified distance from any geographic target coordinates in North America.
Corridor Sampling
The corridor sampling method provides a sample of listed phone records, randomly selected from Postal codes or Zip
codes whose centroids are located within a specified distance from a line on a map. The target coordinates define the extremity of the line or corridor. This can be a road or section of a road represented by two sets of coordinates.
For detailed information on obtaining this type of sample, please contact us or download the following methodological document:
Radius corridor methodology.pdf
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