Tat'sahr was a province on Vulcan. It was the northernmost region on Na'nam continent where the climate in the northern area near the pole was a bit cooler compared to the southernmost areas of the area near Xial. The terrain in Tat'sahr by the central and southern parts consisted mostly of hills and mountains. What few flat areas present were used for some of the hydroponic farming which supported the Vulcan people. There were several large farms that took advantage of the slightly cooler temperate as well as the relative tectonic stability.