Design And Development Of Field Investigation And Evaluation System For Soil And Water Loss Based On Android Platform

At present,the field investigation of soil erosion in China is mainly carried out by professionals through field surveying and mapping,filling in forms,recording in databases and other processes to investigate units and store data.While the calculation of soil erosion modulus and the benefit evaluation of soil erosion are calculated and queried by importing target data into professional software,while the query of investigation unit is carried out by importing target data from database into professional software such as ArcGIS.These methods are not only highly professional,heavy workload,low efficiency,inconvenient data query and high cost of investigation.For this reason,this paper designs and implements a field investigation and evaluation system of soil erosion based on Android platform in combination with mobile terminal system,aiming at improving the efficiency of field investigation and facilitating users' use.The main work of this paper is as follows:(1)Introduce the research status of soil erosion,soil and water conservation and Android development platform at home and abroad,and explain the related technologies of Android system;(2)Comprehensively analyze the various needs of the soil erosion field survey and evaluation system,and design the overall structure of the system.The system uses a multi-layer,component-based architecture consisting of a data layer,a component layer,an application layer,and a tool set.According to the function and authority,the system is divided into three subsystems,namely the soil erosion background value calculation and query system,the national survey unit query system and the field survey and evaluation system.The functional design schemes were respectively introduced,and the functions of layer display function,positioning function,background value calculation,survey unit query and survey unit overlay display,field survey field entry and benefit calculation and evaluation were introduced.(3)Using Google Studio's Android Studio as the development platform,Java as the development language,and Android version 4.0 and above.In this environment,a field survey and evaluation system for soil erosion was developed.The system realized multiple functions including satellite layer display,map location,survey unit query,modulus calculation and benefit evaluation.(4)Perform functional test and reliability test on the system.The test results show that the system pass rate is good and the execution efficiency is stable.This paper elaborates the whole process of development from the perspectives of related technology and theoretical research,demand analysis,system design,system implementation,testing and operation.Finally,it makes reflections and analysis on the shortcomings in the system development process to improve the system.