Historical geographic image

1. pictures of famous historical figures are independent in cold and autumn, Xiangjiang River is north, and Orange Island. You see the mountains and plains, and the layers of forests are all dyed; The river is full of water, and hundreds of people compete for the flow. The eagle strikes the sky, the fish is shallow, and all kinds of frost fight for freedom. Lonely, ask the boundless earth, who is in charge of ups and downs? Took a hundred couples on a trip. Recalling the past, the years are thick. Just a classmate and teenager, in full bloom; Scholar spirit, Fang Qiu.

It's just that a classmate's juvenile plot points out the mountains and rivers, and inspirational words, dirt is Wan Huhou in those days. Do you remember that you hit the water in the middle stream and the waves stopped the flying boat?

2. The first commercial satellite with sub-meter resolution of historical remote sensing images was put into operation in 1999, but it was very difficult to obtain historical remote sensing images before that.

Archive time of decrypted aerial images: 1920 till now. Decrypted aerial images are obtained from 1920 up to now, and consist of archive files from various sources and different groups. For example: NASA, US Air Force, Army Map Service, US Navy, AHAP, etc.

Aerial images covering the whole world can intuitively understand the natural conditions and development in different periods. The shooting area covers key cities in almost all countries.

There are two kinds of aerial image effects: one is to make topographic maps or image maps, all of which are shot from high altitude by orthographic projection, with large scale, mostly for towns; The other is based on military requirements, that is, it is used for military operations, with a small scale and mostly natural landforms. The scale of aerial images is between 1:5000 and 1: 100000.

Most of the images are well-defined and clear. The images of some famous cities, whose landmark buildings are easy to identify, and the details of houses, streets and so on are almost the same as today's shooting effect.

Archive time of keyhole series: 1960 to 1980 keyhole series can provide KH- 1-4 (corona) and KH-5 (argon) between 1960 and 1980. Most of the archive images of KH-4A and KH-4B are concentrated in the period of 1966- 1972.

At present, CORONA series satellites have been launched 32 times. After long-term debugging, the satellite orbit has been reduced to the level of 166 km, the resolution has reached 1.8 m, and the return visit period is 1 day, which can provide stereoscopic relativity. The archive images of KH-7 are concentrated in July 1963 to June 1967.

At first, the resolution was 1.2m, and 1966 was raised to 0.6m. Shooting targets mainly focus on strategic targets, nuclear targets, missile defense and ballistic missile systems. Except for nearly 100 Israeli pictures, all 19000 pictures taken by KH-7 have been decrypted.

KH-9 archive image can be regarded as an important supplement and a substitute for KH- 1-4 archive image. KH-9 has photographed a large area of the world with a resolution of 6 meters, and has decrypted 29,000 images except Israeli territory.

Resurs series archiving stage: KeyHole series from 1974 to 2005 played an important role in the resource integration of historical remote sensing images, showing excellent spatial resolution, temporal resolution and mapping accuracy, although it was still limited by phase and band. The emergence of "Resurs-F" series fills this gap. The project began in the 1970s. The decrypted satellite images of resource series include: resource -F 1, resource -F2 and resource -F3, which have been commercialized in China since 2008.

It is obvious from the above parameters that the differences between Resurs-f and KeyHole are still great. In addition to having more bands and wider widths, it is also surprisingly tacit with KeyHole series in terms of phase and resolution. These subtle matches inevitably mean that it has more extensive applications and deeper spatial domain analysis than KeyHole series.

In addition, Resurs-f series has multi-spectral bands, which is incomparable to panchromatic images. It can replace the simple manual recognition of ground objects and get faster and more accurate image information extraction. It has become an important source of scientific research topics such as planning, ocean, environment and ecology.

Like keyhole series, the Soviet Union also has its own surveying and mapping satellite Kometa, but the resolution is slightly lower than KH-7. Kometa is equipped with two stereo imaging cameras: KVR- 1000 and TK-350 to help collect stereo images.

Spaceborne mapping imaging system is used for spatial information collection and mapping. Panchromatic images can produce 1:50000 topographic maps and stereoscopic images.

At the same time, the satellite is equipped with an image acquisition and control system, which is used for professional surveying and mapping and provides the basis for digital orthographic model. Historical remote sensing images have the characteristics of long time span and high resolution, and can be well applied to dynamic monitoring.

KeyHole, Kometa and RESERS-F series satellite images cover all areas of China, with a time span from the 1960s to the present, and are widely used in the study of dynamic monitoring of geographical conditions, land, ocean, planning, archaeology, water conservancy, environment and scientific research. To provide technical support for rapid decision-making. The application of historical remote sensing images in the monitoring of geographical national conditions is to dynamically, quantitatively and spatially monitor topography, water system, traffic, surface coverage and other factors by using 3S and mapping technology, and statistically analyze their changing laws, frequencies, distribution characteristics, regional differences and trends, so as to form monitoring data and maps reflecting the spatial distribution and development and changing laws of various resources, environment, ecology and economic factors.

Compared with other provinces and cities, this is only a representative with strong pertinence. Historical remote sensing images of various ages are the basis of monitoring geographical conditions, from which targeted special studies can be derived, such as coastline changes, urban-rural ratio, land use, vegetation, water system and so on.

It is precisely because of historical images and historical basis that we can understand the changes and development of geographical conditions, adapt to nature and make nature change in a direction beneficial to the people, among which historical remote sensing images are essential. ..... For more details, please contact Beijing Top Vision Technology Co., Ltd. ..

3. How much is the historical remote sensing image? Online equal resolution is the smallest unit of measurement for recording data, which is generally used to describe the number of points (rows and columns) that can be displayed on a display device, or the area represented by a pixel in an image.

The flying height of remote sensing satellites is generally between 4000 km and 600 km, and the image resolution is generally between 1km-1m. When the resolution is1km, one pixel represents the area of 1kmX 1km on the ground, that is,/kloc-0. When the resolution is 30m, one pixel represents the area of 30m*30m on the ground; When the resolution is 1m, that is to say, one pixel on the image is equivalent to the area of 1m× 1m on the ground.

The specific choice of resolution depends on your actual needs and applications.

4. Historical pictures are true records and miniature of social life in a certain period of human history (1). The Soviet people are determined to defend their motherland to the death and resist fascist aggression.

From the autumn of 194 1 to the beginning of 1942, the Soviet people bravely defended Moscow and won, breaking the myth that the Germans were invincible. (2) Britain, the United States and the people of the world gradually United against fascist aggression, and the World Anti-Fascist Alliance was established.

Countries with different social systems, different races and different religions came under the banner of anti-fascism, which greatly inspired the fighting spirit of people of all countries, strengthened the anti-fascist forces, fundamentally reversed the unfavorable situation of international power comparison, and laid a solid foundation for finally defeating fascism. (3) The picture shows countries solving conflicts by peaceful means under the impetus of war and people's anti-war sentiment.

On the one hand, the convening of a series of international peace conferences reflects the trend of countries to resolve conflicts and disputes by peaceful means. This is conducive to promoting world peace and has played an important role in the economic recovery and development of countries after World War I. ..

On the other hand, this series of meetings is manipulated by big powers, which can't completely solve the contradictions among big powers, making them greatly discounted in maintaining world peace. This problem is a picture analysis problem.

It mainly examines students' ability of analysis, induction and summary. The key to solve the problem is to put the information implied in the picture into the historical environment for analysis.

You can answer according to what you have learned.