Google Maps accuracy

I’ve been using Google satellite to meaure lots of jobs but lately I feel like I’m missing something when measuring roofs. Just an example, let’s say I have a 1600 sq ft house that I find the sq ft online and from the owner and its totally accurate. But the roof is 2000 sq ft when I use Google satellite to measure. Does anyone else have this issue? Am I missing a factor?

Soffit, pitch, and general margin of error in the software and mapping data?

Perhaps but its pretty easy to navigate. Its just right click and measure. And it’s a birds eye view so I don’t know if it takes into account the pitch.

I know the little geo programming I’ve done had a margin of error, don’t think they’d disclose it though. It’d be interesting to check it against a flat surface you can actually measure accurately IRL.

Could measure a football field in your town to find the accuracy

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Square footage is typically measured using living space. The additional sq ft that you come up with probably includes the attached garage.

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