> Plus, you have no idea what time of day the car will be passing through a location.
I don't, but I assume google does.
> So you can't compare the data points over time - they're not taken the same time of day
Not in a simple way, no. But to say it doesn't provide useful information seems odd when the article says
> Independent scientific analysis confirmed that the mobile sensor system worked for collecting street-by-street data, and could improve upon the regional network of sensors operated by the Environmental Protection Agency.
How do you read that quote as a positive thing? The first half merely says it was successful in collecting data and the second half uses weasel words "could improve".
I've worked on projects in the past where we collected a ton of data like this, gave it to some poor graduate student or post-doc to do a bunch of data wanking with it, only to produce throw-away papers in bad journals because even. Though it was a huge amount of data it wasn't good data.
I don't, but I assume google does.
> So you can't compare the data points over time - they're not taken the same time of day
Not in a simple way, no. But to say it doesn't provide useful information seems odd when the article says
> Independent scientific analysis confirmed that the mobile sensor system worked for collecting street-by-street data, and could improve upon the regional network of sensors operated by the Environmental Protection Agency.