Milltown Cemetery - how to apply plot information to map

[surlie]

Hello - I found a very helpful map of Milltown Cemetery on another thread.  My issue now is to apply the plot details to the map.  For example, I have a plot identified as "Z-65-A"  Is this the "A" side of the cemetery, section 65 row Z?  Also have another:

Sexton's number: 8819
Registrar's number: 5
Latitude:  Wa
Longtitude: 58

Any ideas as to how I would find that plot too?  Thanks in advance.

[hallmark]

...and the link is.....

[surlie]

Also wondering if the naming convention changed over the years which is why there are different formats?

Here is a link to the map
http://chasinggenes.blogspot.co.uk/2015_11_01_archive.html