The real deal, not the imposter Canals.pud infringing on the naming rights.
Note that each starting spot is very easily walled in to protect from land attacks. However note also that thanks to the titular canals, ships can easily sail under your space and attack parts of your town including the wall-in itself. Ships are able to approach slightly closer on the right side to offset the fact that the right side can wall in and pop grunts and other units out.
If you have an unofficial version of Canals I suggest you rename it when you save this to your maps folder, otherwise you may overwrite it, although that also is fine.