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 map was drawn by ArcGIS program (version 10.4.1; ESRI, Redlands, California, USA) using the base layer (https://pro.arcgis.com/zh-cn/pro-app/latest/help/mapping/properties/plate-carree.htm).
