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

Datasets

City
Sensing target pollutants
Sensing fleet
Duration
Files

New York City (USA)
Particulate matter, particle size distribution, NO2
Five municipal vehicles

Oct. 2020 - Feb. 2021

Sep. 2021 - Dec. 2021

NYC_Pilot1_PM.csv 

NYC_Pilot2_NO2_Part1.csv

NYC_Pilot2_NO2_Part2.csv

NYC_Pilot2_PM_Part1.csv

NYC_Pilot2_PM_Part2.csv

NYC_Pilot2_PM_Part3.csv

Boston (USA)
Particulate matter, particle size distribution, NO2
One mobile air laboratory
Feb. 2022 - Apr. 2022
Boston_Pilot_PM_NO2.csv

Beirut (Lebanon)
Particulate matter, particle size distribution
Two Taxies 
Feb. 2022 - Jun. 2022
Beirut_Pilot_PM.csv