First of all... I do not know if this is a valid question here. If not please tell me a site to ask for help in this.
My question is about the coordinates of google maps... how accurate they are? I mean what exactly they mark... it is a region? for example a circle of 1 km of diameter... or really is is the exactly point where you are stand?
If it is a big region the next question does not have sense I think...
If it is exactly a point, it is possible to ubicate that point in google map in another map let say some like: https://thecaveoflittlereik.000webhostapp.com/AppEvaRest/Storage/ITT_LaboratorioComputo.svg
It was that clear? I need the same point in both maps.
This paper, published in 2013, reports some results about positional accuracies. It claims that, for horizontal coordinates, the root mean square error is about $1.59$ meters.
This other paper, published in 2016, looks quite interesting.