Storm surge and sea level rise are threats to the traditional cultural adaptation along the coast of Louisiana. These threatened places were selected from a large data set of landmarks and populated places as developed by an ongoing Louisiana Places Project. That project mapped the location of places where the original French place names were changed to English names.
The large data set of more than 42,000 places were identified by using the Geographic Names Information System (GNIS), which the US government uses on official maps. The data is used for a large variety of purposes from civil defense to civil engineering.
The large data set was classified into smaller subsets, some which like airports, while important, were not used as markers off a traditional cultural adaptation along the Gulf Coast. Rather, a set of threatened places were chosen that included incorporated municipalities, roadways, hospitals, schools, post offices, cemeteries, and historic places.
Roadways, hospitals, and school represent significant expenditures of public founds to create public facilities . The replacement value of the infra-structure represents investments made by at least four generations as population density increased along the Gulf Coast.
Post offices and cemeteries speak of historical development before the 19th century. Each of these kinds of facilities are typically created by a community and are rarely abandoned. It goes without argument that cemeteries are rarely relocated or moved. Post offices are rarely closed because the US postmaster carefully plans the location of each facility and when necessarily requires their closure, their location is typically marked and maintained. As such, the maps locate historic and current post facilities.