Topographical map generated from MOLA data including feature boundaries. Acidalia Planitia is the central, northernmost feature characterized by dark blue, low elevation land.
United States Geological Survey
<a rel="nofollow" class="external free" href="https://planetarynames.wr.usgs.gov/images/mola_regional_boundaries.pdf">https://planetarynames.wr.usgs.gov/images/mola_regional_boundaries.pdf</a>