![](https://mappery.org/wp-content/uploads/2023/02/mastermap.jpeg)
Diane Fritz found this great brass “MasterMap” in Minnehaha Creek, Minnesota. It’s even self referential, mapping its own location at site 3!
@OrdnanceSurvey, where are your brass ones?
Diane Fritz found this great brass “MasterMap” in Minnehaha Creek, Minnesota. It’s even self referential, mapping its own location at site 3!
@OrdnanceSurvey, where are your brass ones?