Hi,
the 3 series camera is good enough for the ANPR function since Hikvison has already support the ANPR function in 3 series in some East Europe countries.
And the 3 series model also support HEOP which means there are more hardware resoucees (ram, flash) inside the 3 series camera which will...
they have support ISAPI metadata protocol where you can get all these metadata information including the coordinates information.
https://tpp.hikvision.com/
yes, usualy the algorithom doesn't work well when you enable the rotation since the ratio change to 9:16 and is not the same ration as they train the algorithm