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.
Map made by the authors, using the QGIS program (https://www.qgis.org/en/site/index.html) and spatial data from DIVA-GIS (http://diva-gis.org/). Both repositories are Free and Open Source Geographic Information System.
