> I think < 10 cm accuracy is achievable If you don't know how precise GPS receivers can get with dead reckoning techniques, this demo of someone "drawing" ont

> I think < 10 cm accuracy is achievable If you don't know how precise GPS receivers can get with dead reckoning techniques, this demo of someone "drawing" onto a map of their driveway using a GPS receiver is very impressive: https://youtu.be/3tQjIHFcJVg?t=245 https://youtu.be/3tQjIHFcJVg?t=245 It looks like they're getting measurements that are only a few inches away of the module's real position, although of course the conditions seem favorable with an unobstructed sky and consistent alignment. The module they use is a ZED-F9P by u-blox. I've used ~$50 u-blox GPS modules in DIY electronic projects before since they're often the brand you'll get when buying GPS modules, but this particular type with dead reckoning is much more expensive. Sparkfun has it for $275 for example: https://www.sparkfun.com/products/16481 https://www.sparkfun.com/products/16481.