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October 2015, № 10 (185)

Dubrovskaya S.A., Raikhov R.V. THERMAL STRUCTURE AND ABNORMALITIES MAGNITOGORSK RESULTS INTERPRETATION MULTISPECTRAL IMAGESDifferences of temperature of a surface of the urbanized territories from surrounding natural landscapes it is connected with the anthropogenous transformation of space which is expressed in density of building, the small area of wood plantings, pollution of the atmosphere, activity of the industrial enterprises, transport and other sources of thermal pollution. All above-mentioned forms the "islands of heat" influencing comfort of accommodation of citizens. For receiving cartographical model of the urbanized territory and identification of thermal structure and steady anomalies of the city of Magnitogorsk, pictures in the thermal infrared range from Landsat 5, Landsat 7, Landsat 8 satellites, with the spatial resolution of 100 meters are used. The analysis was carried out by means of software products ENVI 5.1, ArcGIS 10.2, with application of algorithm of uncontrollable classification of raster images ISODATA. Thermal abnormal areas of the city of Magnitogorsk are subdivided into constants (steady, revealed in all pictures, having the identical area), constantly unstable (come to light in all pictures, having the different area), temporary steady (are defined in the pictures only of a warm season having the identical area) and temporary (unstable, shown only in some pictures), technogenic influence of industrial enterprise of Magnitogorsk Iron and Steel Works, background thermal radiation. The areas of thermal anomalies connected with technogenic manifestations are separately allocated (pollution of water and soil objects, snow). The created cartographic materials on the basis of a decodifying of thermal data of space shooting, allow allocating the objects having the strongest impact on the general intensity of thermal radiation. Presence on the card of thermal anomalies testify about existence in an urban environment of the areas of ecological intensity influencing natural and technogenic structure of the city and comfortable accommodation of citizens.Key words: decoding, unsupervised classification (algorithm ISODATA), thermal infrared, clusters, tehnogeosistems.


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About this article

Authors: Ryahov R.V., Dubrovskaya S.A.

Year: 2015

Sergey Aleksandrovich

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