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.
Examples of subjective border grading, showing manual border (solid line) and automatic border (dashed line). Approximate borders (b) and (c) are “good enough.” In (b) the border difference is due to low contrast. In (c) the automatic border is subjectively as valid as the manual border.
