A site that is invaluable in helping with this, is Murray's KiwiCelts NZ Cemeteries database for all New Zealand. ENTER "THAMES" in the search box, then you can click on which ever area you are interested in - to zoom closer and look at the cemetery and also see what information is available. Like google-earth, you can look closely at the selected cemetery.
As previously mentioned there is a summary at this page of my Thames site.
|Shortland Cemetery - in the days before trees and bush took over, making it difficult to locate graves in the upper section|