The location of Manark IV in "The Explored Galaxy" wall chart
Manark IV was the fourth planet in the distant Manark planetary system. This inhabited planet was the homeworld for the sand bat. The planet was located in the Alpha Quadrant. Its location in the Milky Way Galaxy was depicted on a Federation star chart in 2293. In 2371, this planet appeared in the starchart Data and Picard were studying in Stellar Cartography. (TOS: "The Empath"; Star Trek VI: The Undiscovered Country; Star Trek Generations)
"The Explored Galaxy" was a map of charted space in the Alpha Quadrant. The Tholian Assembly and Romulus/Remus were identified in dialog as being located in this quadrant. (DS9: "The Search, Part I", "Call to Arms") The chart was also seen in several Star Trek: The Next Generation and Star Trek: Deep Space Nine episodes set in the 24th century, from the year 2364 to 2370. These were: TNG: "Conspiracy", "The Measure Of A Man", "The Emissary", "The Mind's Eye", "The Game" and DS9: "In the Hands of the Prophets", "Cardassians".