Degree Precision vs. Length

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https://en.wikipedia.org/wiki/Decimal_degrees

I found this chart in one of the questions here.Additional to this: When making a measurement and getting 2 Measures of Latitude, for example 51.1901354 and 51.1901359.Is it then possible to say that these points are 5.55 cm apart?Also, I am using this formula to get meters rather then degree:

Northing = (Latitude-Base_Latitude)*(6378137*pi/180)

Easting =(Longitude-Base_Longitude)*(6378137*pi/180) * cos(Base_Latitude*pi/180)

Is the Chart above usable with this Convertion?



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