Portion of the global topography of Mars from the Mars Global Surveyor (MOLA) and Mars Express (HRSC) spacecraft (source: https://astrogeology.usgs.gov/search/map/Mars/Topography/HRSC_MOLA_Blend/Mars_HRSC_MOLA_BlendDEM_Global_200mp)
Overlay is a 5-color density slice from the topography; this also indicates elevation: blue for the lowest elevations, greens for higher (higher elevations aren’t present in this area).
This section is the northern hemisphere (0° - 88° N) from longitude 270°E to 360°E, 10x vertical exaggeration.
The large flat area near the south side of the model is Chryse Planitia.