Landsat-8 satellite selection remote sensing data set customization screening method

Abstract

The invention discloses a customized screening method for Landsat-8 satellite selected remote sensing dataset, which includes such steps as obtaining global metadata retrieval result, setting a data quality evaluation index, screening an effective metadata set, setting an application scene screening threshold, screening a matching metadata set, judging whether the spatial range is completely covered, setting ta hreshold modification mode and arranging a list of selected remote sensing data set; While guaranteeing the data quality of the remote sensing image, the method avoids the repeated participation of users in the process of filtering and filtering the retrieval results, Easy to operate, As that data quality evaluation index is set, Setting application scene screening threshold, setting threshold modification mode and other steps solve the problems of traditional remote sensing image data sharing service system, such as fixed retrieval mode, redundancy of retrieval results, uncontrollable retrieval quality and so on, and provide a solution to improve the accuracy and efficiency of remote sensing image data retrieval results.

Description

technical field [0001] The invention relates to the field of data screening methods, in particular to a customized screening method for Landsat-8 satellite selected remote sensing data sets. Background technique [0002] Space-based Earth observation technology provides multi-temporal, wide-coverage, and three-dimensional remote sensing image data for Earth system scientific research, making it possible to observe, understand, simulate, and predict the behavior of the entire Earth system. Remote sensing image data obtained through satellites, aviation and other means has rich space, time and attribute information, and has become an important source for research and solutions to key issues such as global change, disaster prevention and mitigation, and sustainable development. At present, remote sensing image data retrieval methods include: subject classification directory retrieval, keyword matching retrieval and list menu retrieval, etc. However, as the amount of remote sen...

AI Technical Summary

Problems solved by technology

In this method, the operation object of the customized screening of the Landsat-8 satellite selected remote sensing dataset is set as the global metadata retrieval result of the study area. First, the day and night observation mode, sensor type, number of ground control points, and cloud coverage of the whole scene are set. The data quality evaluation index preliminarily screens out the valid metadata set; then sets the imaging time and the threshold of the entire land cloud coverage according to the application scenario requirements, and uses the effective metadata set with the same row and column number of the framing grid as a unit to traverse and filter the matched metadata. Data collection; In view of the situation that there is no matching metadata set in some grid cells due to the fixed threshold, that is, the spatial range cannot be fully covered, two modes of modifying the imaging time threshold or the threshold of the entire scene of land cloud coverage are further supplemented and improved, and finally the labeling A collection of matching metadata for data quality confidence collated into a list of curated remote sensing datasets

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