The city of Oulu Finland is located in Northern Finland within the region of Northern Ostrobothnia, Finland.
I searched modern names of the different areas looking for "Impijats" "Impitaja", "Impijas" or something similar in different areas of the city, lakes, rivers and was not able to locate it browsing Google Maps of the city itself or the surrounding communities. I did note that most locations in the central city are prefaced with "Oulu" so that may help or it may just be a coincidence.
I did not see anything closely related to in the list of Parishes listed on FamilySearch for Oulu, Finland. The wikipedia page for the city also has some churches listed on it but none match the name or seem close to the hand writing.
The place is also not listed in the Parish maps of Finland on RootsWeb.
Nor reviewing the list of all modern street names of the city using GeoPostCodes.com but that is a place you could further look for further variations / pronunciation of Impijas or the name behind Oulu.
There is a possibility that the word behind the location of Oulu is not a location but an accompanying descriptor as well; but I do not know Finnish.