Research On Interpolation Of Isoline Of Meteorological Facsimile Map

The meteorological facsimile map,which contains various meteorological elements such as temperature,air pressure and wind direction,can reflect the weather map of a region's weather and changing regions in real time.The meteorological facsimile map is widely used in the fields of meteorological prediction and broadcasting,navigation and military.However,in the field of recognition and real-time processing of meteorological facsimile maps,there is still a lack of automation.The weather conditions in the unmarked places are dependent on human experience,so the process of numerical and automation of meteorological facsimile maps is urgently needed.Isoline is the most intuitive form of data in meteorological facsimile map.Due to the geographical location of observation stations and other reasons,there are still some problems such as uneven distribution of data and large interval.Therefore,it is of great significance to study the interpolation and reconstruction of the contour lines.Therefore,it is of great significance to study the interpolation and reconstruction of the contour lines.The traditional isoline interpolation methods such as inverse distance weighted Kriging,and trend surface method still exist problems such as large error,computational complexity,higher requirements on data distribution,low applicability and so on.On the basis of fully studying the interpolation and rendering process of isoline from meteorological facsimile map,this paper summarizes previous research experience,and puts forward the following improvements from the perspective of performance improvementFirstly,aiming at the problem of data redundancy and computational complexity in isoline equal interval sampling process,a sampling method based on curvature variation is applied.In order to solve the problem of insensitivity to error in the traditional interpolation process,an interpolation method based on the center to the periphery of the key points is proposed.Secondly,aiming at the most commonly used inverse distance interpolation method,the direction factor is taken into consideration,and some calculation errors are reduced by improving the calculation process.Thirdly,in view of the complex tracking problem of traditional contour drawing algorithm,a new algorithm for directly generating contour lines is presented,which is combined with Super-resolution reconstruction method and intersects the surfaces generated by interpolation and horizontal projection.