DESIGN OF METEOROLOGICAL EARLY WARNING SYSTEM FOR WEATHER MODIFICATION BASED ON GEOHASH
Through studying the OpenSource GIS library such as GDAL, SharpMap, NetTopologySuite, and the Geohash algorithm theory, we presented in this paper a solution to improve the precision of regional query of Geohash algorithm in light of the problem of Geohash that it is unable to implement accurate query in spatial region, and realised the meteorological early warning system for weather modification based on this.The system employs Geohash algorithm for regional retrieval, and by combining with the methods of precisely calculating the geographical distance on Geohash encoding by above open-source class library and dividing the minimum bounding rectangle of the query area, it effectively improves the retrieval accuracy of the algorithm.Through experimental comparison, in the circumstance of the bigger the spatial data but the smaller the query area, it is able to reflect more the accurate query efficiency in Geohash encoding-based spatial region is higher than that of the query based on latitude and longitude.The solution effectively improves the retrieval and analysis efficiency of regional grid data in meteorological early warning, and provides certain applied reference value for processing the massive meteorological data.
Meteorological early warningGDALGeohashGrid data processingSpatial region Query
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