These represent a good summary of the classic material on this topic
For a good summary of the basic issues surrounding Geospatial Data Quality you will need to understand to work with these maps…
And this at least skim this classic work
Here but one of the many monthly articles from a great educator published by inside GNSS
These links do not deal with ‘datum’ transformation issues and that topc is (will be) covered by another article.
All these folks are much smarter than this author, if after reading their works you have questions, then please ask.