The online mapping service, Google Earth, has come out with an updated, very clear satellite view of the northeast corner of the Korean island of Ulleungdo (鬱陵島 - 울릉도). They also have very clear, close-up views of Ulleungdo's neighboring islands of Gwaneumdo (觀音島 - 관음도) and Jukdo (竹島 - 죽도). Gwaneumdo is only about 100 meters off Ulleungdo's east shore and looks more like a cape than an island. Jukdo is about 2.2 kilometers off the east shore. Both Gwaneumdo and Jukdo can be seen in the photo below. (My thanks to commentor GTOMR for telling me about these photos.)
Below is a close-up of Ulleungdo's neighboring island of Jukdo (竹島 - 죽도), which is about fifty-one acres (207,818 sq. meters) of essentially flat, fertile land. Jukdo means "Bamboo Island," and even today the island has a grove of bamboo growing on it. The old Korean name for Jukdo was Usando (于山島 - 우산도), and the island has appeared on Korean maps of Ulleungdo since the 16th century. Usando means "Island of Usan." Though Koreans claim that Usando was the old Korean name for Dokdo (Liancourt Rocks), Korea's old maps show quite clearly that it was actually Ulleungdo's neighboring island of Jukdo.
Below is a map of Ulleungdo (鬱陵島 - 울릉도) from the 1834 Korean atlas "Cheonggu-do" (靑邱圖 - 청구도), which was made by famed Korean mapmaker Kim Jeong-ho (金正浩 - 김정호). The map shows an island offshore labeled as "Usan" (于山) off Ulleungdo's eastern shore. The hash marks at the bottom of the map represented ten ri segments, which was about four kilometers. That means that the map showed "Usan" about four kilometers offshore. From the position of the island and its shape, we know that "Usan" (于山 - 우산) was Ulleungdo's neighboring island of Jukdo (竹島 - 죽도).
For more than fifty years, South Korea has been trying to justify her armed occupation of the Japanese islets of Takeshima (Liancourt Rocks), which Koreans call Dokdo (獨島 - 독도), by claiming that it was the old Korean island of Usando (于山島 - 우산도), but Korea's own maps and documents prove that claim false. Liancourt Rocks (Dokdo) is essentially two rock islets ninety-two kilometers southeast of Ulleungdo, but Korean maps show that Usando was only one island just off Ulleungdo's east shore.
The picture below shows the satellite photo of Ulleungdo's neighboring island of Jukdo with an overlay of the Usando from the 1834 Korean map. Notice that the shapes are very similar. (The overlay was prepared by commentor GTOMR.)