Meteorological Facsimile Map Vectorization Information Connection And Information Storage Structure Design

A meteorological facsimile map provides weather conditions information of certain area.Its expression is simple and intuitive.But meteorological facsimile maps are bitmap images,which have the disadvantage of large storage space and are inconvenient to information fusion.Transformation of bitmap format meteorological facsimile maps into vector format can improve the use of meteorological facsimile map,and makes data fusion with other navigation information more convenient.Therefore,the study of meteorological facsimile map vectorization is of significance.Meteorological facsimile map mainly includes the pressure system,alarm,isobar,tropical cyclone weather information,etc.Based on the extract of the isobar,pressure value and other information by other students,this article first extracts the meteorological facsimile map of pressure center moving direction and pressure center point,then matches the relevant information of meteorological facsimile map vector information,and finally designs storage format of vector meteorological facsimile map and accomplish the process of the meteorological facsimile map vectorization.During the process of extracting the meteorological facsimile map of pressure center moving direction and pressure center point,which needs to remove the fixed information of the meteorological facsimile map and then binaryzationize it.As to the extract of the pressure center moving direction,which uses template match method that mainly includes the selected template and the rotation angle,template matching based on correlation,final extraction of pressure center moving direction and so on.For the extraction of pressure center point,considering the meteorological facsimile map exists in three different forms,and its deformation degree and interference by other information is different,so the extraction at the center of pressure for each different form corresponds at different ways.When matching relevant information of meteorological facsimile map and it needs to analyze the characters of certain information,and uses different methods for different characteristics to relate to their association.This article uses the smallest between two points Euclidean distance method and the ray method.To design meteorological facsimile map vectorization information storage form.It mainly utilizes geographic information system storage methods and combines with the characteristics of meteorological facsimile map vectorization information for storage.The experimental result shows that the research method of this article can be good to extract meteorological facsimile map of air pressure center moving direction and pressure center point,and can match the relevant information of meteorological facsimile map and also can store meteorological facsimile map vectorization information and related information as a file form,which can be conveniently read and hierarchically displayed.