This image shows the location of Isidis Planitia and several other features on a globe of Mars. The globe on the left is roughly how the Eastern Hemisphere of Mars would look to your naked eye. The right-hand globe is an "elevation map" of Mars. Red and orange indicate highlands and green and blue indicate lower elevations. The two globes don't quite match; you would need to turn the elevation map globe slightly to the right to have the same viewpoint as shown in the other globe.
NASA/JPL/Malin Space Science Systems and the Mars Orbiter Laser Altimeter (MOLA) Team at NASA's Goddard Space Flight Center

This picture shows where Isidis Planitia is on Mars. The Mars globe on the left shows how Mars would look to your eyes if you were close to Mars. The globe on the right shows how high (or low) places on Mars are. Places that are high look red or orange on the right globe. Places that are low look green or blue on the right globe. You can see that Isidis Planitia is low because it is blue.
NASA/JPL/Malin Space Science Systems and the Mars Orbiter Laser Altimeter (MOLA) Team at NASA's Goddard Space Flight Center

This picture shows where Isidis Planitia is on Mars. The Mars globe on the left shows how Mars would look to your eyes if you were close to Mars. The globe on the right shows how high (or low) places on Mars are. Places that are high look red or orange on the right globe. Places that are low look green or blue on the right globe. You can see that Isidis Planitia is low because it is blue.
NASA/JPL/Malin Space Science Systems and the Mars Orbiter Laser Altimeter (MOLA) Team at NASA's Goddard Space Flight Center

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