During an urban geography fieldwork enquiry investigating how environmental quality changes along a transect away from a major transport interchange, a student collected data at six different sampling points.
The four measures they recorded are shown in the table below:
| Measure | Description | Equipment/Method Used |
|---|---|---|
| A | Noise level (decibels, dBA) | Digital decibel meter |
| B | Pedestrian flow (people per 5 minutes) | Tally counter |
| C | Environmental Quality Index (EQI) score (-10 to +10) | Subjective bipolar assessment sheet |
| D | Building age/era classification | Historic town plans and visual key |
Which of the four measures shown in the table do you feel is most useful for an enquiry investigating changes in urban environmental quality along the transect?
Give one reason for your choice.
