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Posts tagged Orthorectification

Agriculture in Great Central Valley, California, USA

37.9N 121.6W

March 28th, 2012 Category: Mountains

USA - January 11th, 2012

While most of the land visible in this thumbnail of California’s Great Central Valley is flat, more mountainous terrain is visible to the north in the full version of this orthorectified image. Here, agricultural fields appear as dark and medium grey rectangles, while more populated areas tend to appear lighter in color.

Ottawa River Separating Ottawa and Gatineau, Canada

45.4N 75.6W

March 10th, 2012 Category: Rivers

Canada - December 31st, 2011

The Ottawa River flows across the middle of this image of Canada, between the cities of Ottawa and Gatineau. The cities appear as bright white areas. The geographically larger Ottawa is situated on the southern banks of the river, while Gatineau is located by the northern banks.

The image is  orthorectified, showing hillier terrain dotted with lakes to the north of the river, and mostly flat terrain to the south. In the full image, numerous fields can be observed in the lower half of the image.

Pontianak by Kapuas River Delta, Indonesia

-0.0N 109.3E

March 10th, 2012 Category: Rivers

Indonesia - January 4th, 2012

Visible as a small white area near the shores of the island of Borneo is Pontianak, the capital of the Indonesian province of West Kalimantan. It is located almost precisely on the equator, hence it is widely known as Kota Khatulistiwa (Equator City). As can be observed in this orthorectified wide-swath ASAR image, the land near the city is mostly flat, while some hills are visible to the north and northeast.

Pontianak is a medium-size industrial city that occupies an area of 107.82 km² in the delta of the Kapuas River. The Kapuas River  is a river in the Indonesian part of Borneo island, at the geographic center of Maritime Southeast Asia. At 1,143 kilometers (710 mi) in length, it is the longest river of Indonesia and one of the world’s longest island rivers. It originates in the Müller mountain range at the center of the island and flows west into the South China Sea creating an extended marshy delta.

Agriculture Around Lower Mississippi River, USA

32.8N 88.7W

March 3rd, 2012 Category: Rivers

USA - December 29th, 2011

This orthorectified image shows part of the section of the Mississippi River called the Lower Mississippi River. This section runs from its confluence with the Ohio River to its mouth at the Gulf of Mexico. Measured by water volume, the Lower Mississippi’s primary branch is the Ohio River.

The widest point of the Mississippi River is in the Lower Mississippi portion where it exceeds 1 mile (1.6 km) in width in several places. Many rectangular fields can be seen on either side of the river, in the Mississippi River Valley. Formed from thick layers of this river’s silt deposits, the Mississippi River Valley is one of the most fertile agricultural regions of the country.

Lakes Victoria, Kyoga and Albert in Uganda

0.3N 32.5E

February 29th, 2012 Category: Lakes

Uganda- January 4th, 2012

This orthorectified wide-swath ASAR image shows several lakes in Uganda: Lake Victoria (bottom), Lake Kyoga (above center) and Lake Albert (upper left corner). The city of Kampala, the capital of Uganda and the largest city in the country, can be seen as a white area by the northern shores of Lake Victoria.

Lake Victoria is an African Great Lake and the largest lake on the continent by surface area, at 68,800 square kilometres (26,600 sq mi). It is the second largest freshwater lake by surface area in the world. Lake Kyoga is a large shallow lake complex of Uganda, about 1,720 km2 (660 sq mi) in area and at an elevation of 914 m. The Victoria Nile flows through the lake on its way from Lake Victoria to Lake Albert. Lake Albert is another one of the African Great Lakes – the seventh-largest lake in Africa, at about 160 km (100 mi) long and 30 km (19 mi) wide, with a maximum depth of 51 m (168 ft).

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