Hyperlocal Environmental Data with a Mobile Platform

This document provides expanded definitions, units, and more information on the data provided in the .CSV files collected using the City Scanner platform, MIT Senseable City Lab over the years 2019-2022

Data Fields

time: The time field is in Unix time and can be converted to local time with a simple script or using online tools.

latitude, longitude: The latitude and longitude readings from the devices are determined via GPS and given in degrees for projected corrdinates.

pm1, pm25, pm10: The particulate matter (pm) readings from the optical particle counter after calibration. The units for each are instantaneous mass concentrations in μg/m3.

no2: The nitrogen dioxide (no2) readings from the gas sensors after conversion and calibration. The unit is instantaneous concentrations in parts per billion (ppb).

bin0-bin23: Twenty-four bins from the OPC containing particle number counts for different sizes, ranging from 0.35 to 40 μm. The bin boundary sizes are as follows from bin0 to bin23: 0.35, 0.46, 0.66, 1.0, 1.3, 1.7, 2.3, 3.0, 4.0, 5.2, 6.5, 8.0, 10.0, 12.0, 14.0, 16.0, 18.0 , 20.0, 22.0, 25.0, 28.0, 31.0, 34.0, 37.0, 40.0

temperature: Ambient temperature reading in degrees Celsius.

humidity: Ambient relative humidity reading in percentage

Overview of Data Collection Studies