We can ask this question with more focus:
which metadata and what functionality would be needed, to collect and manage your data in our wiki ?
A possible future workflow could be:
a) enter/update map into wiki
b) generate a post in your wordpress automatically by using wordpress api and some template magic
c) generate a post in pinterest by pinterest api
The benefit of such a workflow would be the possibility to work on a shared vocabulary in the wiki.
An alternative workflow could be, that you keep everything as it is and we just try to import your data.