August 20th, 2010 Category: Volcanoes

USA- August 14th, 2010

This orthorectified image shows Mount Veniaminof, an active stratovolcano located on the Alaska Peninsula. Veniaminof has one of the highest elevations of Alaskan volcanoes. Partly for this reason, it is covered by a glacier that fills most of the caldera.

The volcano’s caldera was created by a colossal eruption around 1750 BC. In modern times the volcano has had numerous small eruptions (over ten of them since 1930); these are located at a cinder cone in the middle of the caldera. The Alaska Volcano Observatory, however, currently rates Veniaminof at Volcano Alert Level normal.

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August 20th, 2010 Category: Lakes, Mountains

Rwanda - July 27th, 2010

This orthorectified image shows mountainous western Rwanda and the eastern half of Lake Kivu (left). One of the African Great Lakes, it lies in the Albertine (western) Rift of the Great Rift Valley, on the border between the Democratic Republic of the Congo and Rwanda. The cities of Goma, in the DRC, and Giyensi, in Rwanda, can be seen as white areas on the shores of the lake in the top left corner.

The lake covers a total surface area of some 2,700 km2 (1,040 sq mi) and stands at a height of 1,460 metres (4,790 ft) above sea level. The lake bed sits upon a rift valley that is slowly being pulled apart, causing volcanic activity in the area, and making it particularly deep: its maximum depth of 480 m (1,575 ft) is ranked fifteenth in the world. The lake is surrounded by majestic mountains.

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August 4th, 2010 Category: Lakes, Mountains

Haiti - July 22nd, 2010

This orthorectified image focuses on part of the Tiburon Peninsula, which encompasses all of Haiti’s southern coast and forms a large headland that extends westward towards Cuba. Mountains and hills can be observed on the peninsula, particularly on the right side of the image.

Visible near the image center is Lake Miragoâne, located one kilometer southeast of the city of Miragoâne. It is one of the largest natural freshwater lakes in the Caribbean. The lake is 12 km (7.5 mi) long and 25 km² (9.7 mi²) in area.

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July 22nd, 2010 Category: Volcanoes

USA - June 27th, 2010

This orthorectified image shows much of the island of Hawaii, USA. The island is formed by five volcanoes, two of which are prominent here: Mauna Loa and Mauna Kea.

The former occupies the lower half of the image; its caldera is clearly visible in the lower right quadrant. The latter can be seen in the upper right quadrant. Its sides appear rougher than those of Mauna Loa, whose slopes are relatively shallow.

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July 16th, 2010 Category: Image of the day, Lakes, Mountains, Rivers

Azerbaijan - July 5th, 2010

This orthorectified image shows part of Azerbaijan, from the Greater Caucasus Mountain Range to the north to the extensive flatlands at the country’s center. Approximately 40% of the country is covered by mountains.

South of the mountains, extending southeastward from the left edge, is the Mingechevir reservoir and hydroelectric power station. The length of the reservoir is 70 km, width from 3 to 18 km, deepest point about 75 meters and total area 605 km².

The city of Mingechevir is visible on the southern coast of the lake. It is split in two by the Kur River, a long, meandering stretch of which is visible in the lower part of the full image. The river has a length of 1,515 km.

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July 15th, 2010 Category: Mountains

Spain - June 29th, 2010

The capital and largest city of Spain, Madrid, is visible as an expansive white area in the lower half of this orthorectified image.  The city is located on the Manzanares River; several reservoirs are visible to the north.

Also visible to the North of the city is the Sierra de Guadarrama, a mountain range forming the eastern half of the Sistema Central, a mountain range that runs through the middle of the Iberian Peninsula. The range runs from southwest to northeast, extending for a distance of 80 km.

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July 14th, 2010 Category: Mountains

Spain - July 5th, 2010

This orthorectified image shows the northwestern coast of Spain in the autonomous community of Galicia. The port city of A Coruña (Spanish: La Coruña, English: Corunna), the second largest city in Galicia and the capital of A Coruña Province, can be seen on the coast at the upper right.

Galicia is bordered by the Atlantic Ocean to the west, the Bay of Biscay to the north, and Portugal to the south. The interior of Galicia is composed of relatively low mountains without sharp peaks. Topographically, a remarkable feature of Galicia is the presence of many fjord-like or firth-like inlets along the coast, called rías – estuaries that were drowned with rising sea levels after the ice age.

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June 24th, 2010 Category: Volcanoes

Philippines - June 2nd, 2010

Mount Malindang is visible on the right side of this orthorectified image of the island of Mindanao, Philippines. It is a mountain range rising from 600 meters to 2,404 meters above the mean sea level. The entire mountain range covers 53,262 hectares and is dissected by several canyons, gores and ravines, making its terrain very rugged.

The range covers 53,262 hectares of which about 33,000 hectares is still covered with forest vegetation while more than 20,000 hectares is cultivated and inhabited by forest occupants mostly members of the Subanen Tribe.

The mountain range was believed to be formed through series of volcanic activities within the historical times but was not well documented. Several indicators of such activities are found in the site, including a large crater lake, Lake Duminagat, and two big sunken areas surrounded by high rock walls, cinder cones, dome volcanic plugs, amphitheater structures, extensive distribution of volcanic rocks, carbonized wood found in pyroclastic deposits and two sulfuric hot springs.

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June 20th, 2010 Category: Lakes, Mountains

Switzerland - May 17th, 2010

This orthorectified image shows Switzerland. Switzerland is located in central Europe. It has an area of 15,940 sq mi (41,285 sq km) and a population (2009 est.) of about 7,739,000. Its capitals are Bern (administrative) and Lausanne (judicial). The population is German, French, and Italian. Languages are German, French, Italian, Romansh (all official, with Romansh used locally).

Switzerland is divided into three regions: the meadow-covered Jura Mountains; the central Mittelland, a rich agricultural and urbanized area; and the lofty crags of the Alps. The Alps are visible in the lower half, with Lake Geneva at the center left on the French border and Lake Neuchâtel visible at the top left upon opening the full image.

Tags: Alps ASAR Jura Mountains Lake Geneva Lake Neuchâtel Nittelland Orthorectification Switzerland |  Print This Post |  Email This Post | | Leave a comment