Drawing multiple polygons in Google Maps in the same style
You have several options to reduce the code duplication here.


Put the common values into variables, and replace all hardcoded values with those new variables. 
Create a prototype object of all the properties, and when you create a new polygon instance, copy the prototype instance and overwrite only the field you want to change (the path in these examples).
I saved my favorite to last. Create a helper function that takes a path and returns a new polygon instance, configured with the common values, and the specified path.


Whichever way you choose, you will be able to change values in one place for all map instances, and thereby avoid much of the code duplication.