This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mars Viking MDIM ClrMosaic SS SPOLAR. Planetary Society blog post planetary org html new map of Mars from some pretty old data usgs gov NASA Jet Propulsion Lab USGS File Mars Viking MDIM km plus poles Global mosaic plus poles pixels MB File Mars Viking MDIM ClrMosaic km Global mosaic pixels MB File Mars Viking