TNM video, elevation inventory
Detailed Description
Screen shot, example of The National Map YouTube Video: The US Interagency Elevation Inventory.
Sources/Usage
Public Domain.
USGS
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.
