A Method of Urban Impervious Layer Extraction Based on Landsat Remote Sensing Image

Abstract

The present invention proposes an urban impermeable layer extraction method based on Landsat remote sensing images, based on the automatic threshold impermeable index model (PSO‑UISAT) of the improved particle swarm algorithm, fully considering the seasonal changes and geographic space changes for UIS extraction. Influence, the impermeable layer index, global optimal automatic threshold selection and algorithm comprehensive verification and evaluation are organically combined to form a complete impermeable layer extraction system with high applicability and reliability; the model combines urban index, threshold automatic selection and performance The evaluation is integrated to form a system, which can meet the needs of urban impermeable layer extraction of Landsat remote sensing images in different seasons and different geographical locations, avoiding manual fine-tuning and re-selection of thresholds due to temporal and spatial differences in images, thereby improving Efficiency and accuracy of impervious layer extraction.

Description

technical field [0001] The invention relates to a method for extracting urban impermeable layers based on Landsat remote sensing images, and belongs to the technical field of remote sensing mapping. Background technique [0002] Urban impermeable layer (UIS) is the product of human activities and urbanization. It refers to the area covered by structures such as concrete floors, asphalt roads, airports, and urban buildings within the city to prevent water from directly infiltrating the surface. Urban impermeable layer is an important factor in urban development and management, and its detection, planning and management indicate the level of urban ecological civilization construction. Since UIS brings a series of urban environmental problems, such as urban heat island, urban carbon island, urban rain and flood, and urban water pollution, it is important to accurately grasp the geographical distribution, regional area and development changes of UIS for the overall management pl...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned problems in the existing urban impermeable layer extraction methods and methods, and propose a method for extracting urban impermeable layers based on Landsat remote sensing images, based on the automatic threshold impermeable index model of the improved particle swarm algorithm (PSO-UISAT), fully considering the impact of seasonal changes and geographical space changes on UIS extraction, organically combining the impermeable layer index, global optimal automatic threshold selection and algorithm comprehensive evaluation to form a complete impermeable layer extraction system, High applicability and reliability

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