Google launches deforestation watch website

Am I misinterpreting something, or are they measuring “deforestation” down to the gain or loss of single trees in some places?

I zoomed in on my neighborhood. There was a big reddish blotch, maybe 30x30 pixels, where they put in a new subdevelopment a few years ago–okay. But then I noticed there were both red and blue one-pixel spots in my own area, where the houses are all 30+ years old and there hasn’t been any other development. The pixels would be considerably smaller than individual yards at that magnification.

Is that what’s going on, or is it just noisy data? I guess technologically there’s no obstacle to literally counting every individually distinguishable tree, I’m just surprised.

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