Automatic tool and method for temperature vegetation drought index production and thematic map making

Abstract

The invention relates to the technical field of surveying and mapping remote sensing, in particular to an automatic tool for temperature vegetation drought index production and thematic map making, which comprises a data preprocessing module for image acquisition and preprocessing of surface temperature data and vegetation index data; a data calculation module used for calculating temperature vegetation drought grade data; a thematic map making module used for automatic production of drought grade thematic maps; the automatic production method specifically comprises the following steps: configuring a drawing template for drought grade grading result data, and controlling to generate a thematic map. The embodiment of the invention provides an automatic tool for temperature vegetation drought index production and thematic map making. By obtaining surface temperature data and vegetation index data, automatically fitting temperature vegetation index model calculation coefficients of all regions, calculating temperature vegetation indexes, performing grading, a thematic map is automatically generated based on temperature vegetation index grade data.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping remote sensing, in particular to an automatic tool and method for producing temperature vegetation drought index and making thematic maps. Background technique [0002] Because MODIS satellite has the characteristics of large monitoring range, short revisit period and good time continuity, its long-term series product data such as surface temperature and vegetation index are widely used in agricultural drought, meteorological ecology and other fields. The temperature vegetation drought index (TVDI) obtained based on the vegetation index and surface temperature feature space combines the unique ecological significance of the two parameters, which is more accurate, more practical, and widely used in drought monitoring. . [0003] At present, the domestic TVDI index has been widely used in drought monitoring at the provincial level; for example: [0004] Zhao Jianping monitored and an...

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Problems solved by technology

[0016] The embodiment of the present invention provides an automatic tool and method for the production of the temperature vegetation drought index and the production of thematic maps, to solve the problems in the prior art that the preprocessing of the time series data of the surface temperature and the growth index, the calculation of the TVDI index, and the thematic map of the drought level cannot be realized. One-click processing of map production, realizing long-term TVDI calculation and drought level thematic map production

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