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Seen from Space 2006

Nagoya Castle and the Evolution of Transport Infrastructure

 
Nagoya (kmz, 2.93MB, Low Resolution) as seen on Google Earth.
(Full Image)
The image shows the vicinity of Nagoya Castle as observed by ALOS "Daichi" in May 2006. Ieyasu Tokugawa, who took control of Japan at the Battle of Seki-ga-hara (plain), began constructing Nagoya Castle during the 15th year of the Keicho era (1610) on the Nagoya Plateau where it is convenient for land and sea transportation. During the same time, the Horikawa Canal was excavated in order to transport materials from the sea of Atsuta to the castle construction site. The canal is represented as a black line starting from the south-west corner of the castle and running to the south. About 300 years later, another Nakagawa Canal was excavated in 1930. It connects the former Japan National Railway (JNR) Sasajima freight depot and Nagoya Harbor. Each of the canals was the main cargo transportation route of its time.

The brown lines stretching up and down Nagoya Station are railroads. The JR (Japan Railways) Tokaido Shinkansen Line, Tokaido Line, and Meitetsu Nagoya Line run parallel diagonally from the upper left to the lower right. The JR Chuo Line runs side-by-side with the Tokaido Line for a while, and branches off northward running on the west side of Tsuruma Park. The other line that runs south from Nagoya Station and soon turns southwest is the Kintetsu Nagoya Line.

Nagoya, the central city of the Chukyo Industrial Area has prosperous aircraft industries from pre-war days. One quarter of the city area was lost or destroyed during World War II. However, under the post-war city reconstruction project, Japan's largest (100 m wide) roads were constructed. Hisaya Boulevard runs south 2 km from the southeast corner of Nagoya Castle, intersecting with Wakamiya Boulevard that extends 4 km from east to west. Traffic lanes do not occupy the entire 100 m width of the boulevard, for there are parks and trees along the route. An elevated highway now runs over Wakamiya Boulevard. When seen from the sky, it makes the boulevard look like a wide avenue. As you can see, the transport infrastructure evolved from the waterway to the railroads and to the roads, along with the city developments and technological innovations.

Going south down Nakagawa Canal to Nagoya Harbor, the vast areas of reclaimed lands can be seen, penetrated by the Ise Wangan Highway. Located just near the Tobishima ramp of the highway is the Tobishima Factory of Nagoya Aerospace Systems Works of Mitsubishi Heavy Industries, Ltd. The H2A launch vehicle, which carried ALOS "Daichi" into orbit, was built here. It was then shipped to Tanegashima Island by sea. Therefore, you could say that the transport infrastructure is now extending from here into space.
In the past, transport between Miya (Atsuta)-no-juku (posting station) and Kuwana-no-juku of "The Fifty Three Tokaido Posting Stations" was only by sea. The distance between the two stations was 7-Ri (28 km), and was called "Shichiri-no-watashi" (7-Ri punt). It is known that punts went back and forth around the Tobishima area, but no one ever dreamed that launch vehicles, or punts into space, would be built here 400 years later.



Explanation of the Image:
Satellite: Advanced Land-Observing Satellite (ALOS) (Daichi)
Sensor: Advanced Visible Near-Infrared Radiometer type-2 (AVNIR-2)
Date: 1050 (JST) on May 31, 2006
Ground resolution 10 m
Map Projection: Universal Transversal Mercator (UTM)
AVNIR-2 has four observation bands. The composite image is usually produced by assigning blue to Band 1 (420 to 500nm), green to Band 2 (520 to 600nm), and red to Band 3 (610 to 690nm). The resulting image has natural coloring as if seen by the naked eye. Thus, the ground objects are distinguished by the following colors.

Dark green: Forests
Green or khaki: Grass fields or farms
Bluish gray: Urban area or streets
Red, blue, white: Roofs of buildings
Dark blue: Water surfaces (lakes, reservoirs or rivers)

In the above figure, green is assigned to the sum of 90% of Band 2 and 10% of Band 4, resulting in green being vivid and slightly enhanced.

Related Sites:
ALOS Research and Application Page
Land, Seen from Space
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