> With a dual band survey grade receiver, WGS84 coordinates can be derived to 2cm accuracy in the vertical [0] and even better in the horizontal. Accuracy or p

> With a dual band survey grade receiver, WGS84 coordinates can be derived to 2cm accuracy in the vertical [0] and even better in the horizontal. Accuracy or precision? The issue is accuracy, not precision. > Developers also have to deal with this issue, since web mercator and the tiling scheme were designed for convenience and not sub meter accuracy. This is a projection problem. All projections are essentially wrong, and tradeoffs need to be made (eg. you can't flatten an orange on a desk without distorting some parts of it) . Unfortunately users don't understand this which is why people get excited when they discover America is smaller, and Africa larger, than they thought. Ideally when zooming into a country a more suitable projection would be used, but at the end of the day it doesn't matter much for consumers. I think software developers don't give GIS developers enough credit. Software devs will endless debate and be critical of floating point issues, but also not consult with a GIS professional when doing spatial work. People don't know what they don't know.