Method and system for inverting urban surface temperatures

A surface temperature and city technology, applied in the field of environmental science, can solve problems such as the existence of precision, inconsistent determination methods, and problems, and achieve the effects of low cost, high scope of application, and high precision
CN104748857AInactive Publication Date: 2015-07-01BEIJING NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING NORMAL UNIVERSITY
Publication Date
2015-07-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method and a system for inverting urban surface temperatures. The method comprises the steps of S1, obtaining the TM image data of a region to be tested, S2, preprocessing the TM image data, including atmospheric correction, geometric correction, image enhancement and image clipping, S3, converting the pixel gray level value of the thermal infrared band in the preprocessed TM image data into corresponding radiance, S4, obtaining corresponding a radiation brightness temperature according to the radiance, and S5, converting the radiation brightness temperature into the surface temperature by use of the emissivity of different surface features, wherein the TM image data are multi-band scanning image data obtained by use of an optical earth land satellite Landsat-5 thematic charting instrument TM. The method can be widely applied to monitoring the urban thermal environment, and has the advantages of low cost, high accuracy and wide application range.
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Description

technical field

[0001] The invention relates to the field of environmental science, in particular to a method and system for retrieving urban surface temperature. Background technique

[0002] Since the 1990s, my country has entered a stage of accelerated urbanization, which has led to a surge in urban high-rise buildings, motor vehicles, and man-made heat sources, as well as a huge change in the nature of urban land. These factors have jointly led to urban heat islands, air pollution, and ecological imbalance. and many other environmental issues. Among them, the deterioration of the urban thermal environment represented by the heat island effect has become an important factor affecting the urban ecological environment, and has seriously restricted the quality of the urban living environment. Urban Land Surface Temperature (LST) is an important geophysical parameter that plays an important role in monitoring the heat island effect that affects the comfort of urban life, and ...

Claims

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