Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The concept map is a visual image of linking FTypes and FCodes from The National Map to the Feature subclass of the GeoSPARQL ontology. The geometry values integrate as well.
Public Domain.
