Ogham is one subject, by its very subject, that could never be world standardised. Even the number of symbols has variety and it is never sure if the original alphabet was 20 symbols, 18 symbols or even less. Even our own latinised 26 symbol alphabet has had different numbers of symbols through the ages.
I use 20 Ogham symbols to present my tale of Ogma's Tale Of Trees around the myth of Ogma being the first teacher of Ogham, tales of him doing this around where I live.
Link for that is http://www.ogmatrees.com/
If this does not show as a link here, then my Profile here has a link to it. Have fun with it :-)