The filtering on Maps is pretty basic and its not really feasible to implement for items like what City/County the project is in, or if you want more than 1 condition that’s can be chosen by the user.
It would be nice to perform a search and have a button to show only those results returned on a map in a popup or on the page. This would allow for full filtering abilities to use with the Map.
Alternatively, the same “Add Filters” button could be added to Maps. However, I feel like seeing the results in a Search Component first might be easier.