Something’s clearly not good here. Phone (Samsung S7) has a terrific cam, Mapillary is not set to low res, and I tried even hires and the result seem to be the same.
you uploaded a thumb ?
Do you use the mapillary app and upload via mapillary app?
Enable show detailes stats in teh developer settings and see in which resolution you do the pictures
Doesn’t seem to, except if “4032, 2268” signifies the resolution (in an ass-backwards format). But if you download the original image you’ll see that the resolution is high but the look is extreme.
So the file believes itself to have Quality 90 and indeed what I see is not a typical JPEG artifact, but the image is visibly compressed [or just distorted] somehow. It looks more like some weird sharpness or countour enhancement filter.