Design And Development Of Soil Type Query System In Sichuan Province Based On WebGIS

China is a country with abundant natural resources,and soil is one of the indispensable resources in people's production and life.In the context of current big data,in order to deepen the exploitation of soil resources and maximize development and utilization,information technology has become one of the technologies to be introduced in soil information management.After years of collection and collation by relevant government departments and university research institutes,the county has been the administrative unit to investigate and record the soil resource data of Sichuan Province.However,due to various reasons,the overall utilization rate of soil resource data in Sichuan Province is not high,and data mining is not sufficient.The intensity of data integration processing analysis and final application to agricultural actual production still needs to be improved.In order to solve the above problems in time,the construction of the soil type query system is taken as the entry point,and the feasibility of the system establishment is analyzed,and the utilization of soil data is improved,the data mining efficiency is enhanced,and the related data is realized.Utilization,to achieve the ultimate goal of guiding agricultural production and achieving precision agriculture.On this basis,Ajax and Web Services technology are used to realize the secondary development of Web system.Based on the construction of system database,the integrated management technology of soil type data based on database platform Microsoft SQL Server is explored.Finally,the JavaScript language pair is selected.The function of the system was designed and coded in detail,and a WebGIS system that meets the actual needs of users was built,which laid the foundation for the further expansion of the subsequent application system.The specific research results are as follows:(1)Using GIS technology,the overall design of soil type query system in Sichuan Province was carried out.The overall objectives of system development were defined from three aspects: user demand,function demand and data demand,and the actual application of the system was analyzed.A detailed development process was sorted out as a guide for later development.On this basis,the exploration of the construction ideas including data organization and data concept design is carried out for the system function module and the database as the core of the system support.Finally,a general WebGIS development framework including presentation layer,business logic layer and data layer was built,which provided an example of multi-dimensional query method for agricultural query information system and provided a reference for the organization model of agricultural data concept.;(2)With the provincial scale as the scope,the village-level administrative district is the smallest administrative division,and the plot is the smallest component that integrates all the data and data needed for the system including the soil type in Sichuan Province,and realizes the minimum available soil.This type of precision soil type is required for preservation.Based on this,the technical methods and operational procedures for integrating relevant data are explored.In the process,the data construction standards based on soil type data were clarified,and the soil type map of Sichuan Province was compiled and analyzed,and the distribution characteristics of soil types in Sichuan Province were analyzed.Taking this data as the core,using database technology to design and build a spatial database,attribute database,meta-database,and finally organically integrate it as a data support for software programs;(3)The software program was developed using the front-end development technology represented by ArcGIS API for JavaScript technology.The original code is encapsulated on the premise that the expansion interface is reserved,which provides a simple and clear development method,which provides convenience for the extension of the system in the later stage,and provides a coding reference for the development of similar systems.Combined with the actual situation of the software system,and with reference to the front-end development industry standards,the system development environment and the operating environment are determined,and thus the overall interface of the system and various functions including user operation basic functions,data query functions,and information statistics functions are included.Encoding implementation.Finally,the land parcel is the smallest unit,the soil is the most detailed classification,and the relevant information of the provincial,city,county,township and village administrative areas is accurately inquired,and the soil type map can be mapped to the target administrative area according to actual needs.Thereby,the information management of soil type data is achieved,and the soil type information service system for the public is constructed,which promotes the standardized management and efficient use of soil type data resources.