This seems to have become accepted usage on this forum, to the detriment of understanding that there are central and coastal routes south of Porto as well.
That is correct . The Central comes from Lisbon
the Costal from Cascais but does not hit the coast .
From Porto there is the Central which is 240 kms to Santiago
The Coastal to Vila do Conde to the Central in São Pedro de Rates and via Tui is 260 kms
The full Coastal via the ferry watertaxi or swimming in Caminha to A Guarda and by Baiona and Vigo is 280 kms
There are several variations like the cut from Caminha to Valença and the relatively new as far as I know not waymarked one from Viana do Castelo to Ponte de Lima.
( you will miss
Casa da Fernanda by walking that one btw
)
About the Caminho para Braga
it starts in Porto and follows the route out of Porto on the Central route .
in Maia it veers to the north east to Vila Nova de Famalição and Braga
North of Braga you can choose to go to Ponte de Lima in north western direction or in north eastern direction , to the Interior caminho
There are subforums here on the forum like the Geira and the Torres.
Last year at the Pilgrims Office we had an overview in the computer about the main routes as mentioned above and we had to calculate sometimes the kms they walked when there were more “ uncommon “ routes ( anyway for the crowds ) Especially I remember a guy who came from Mallorca or another guy coming from Metz in France.
I do not know how they do it now since this year the registration tool the website of the Pilgrims Office has changed and the Compostelas are printed now and as I understood the Certificate of Distance too.