Develop an efficient GIS embedded web application to manage the field data -a case study of damage assessment in lands combining maps and,GPS measurements

Abstract

In the present day web applications, location based interactive requirements are increasing. WebGIS applications are moving towards applications that have many user levels incorporating data entry, verification and decision making. Coordinates of a location are the most important data for such applications. Boundary determination, decision making, area calculation, distance measurement, comparison of land parcels etc, are some of the functions that need to be done for land management and assessment process. Way points collected from Global positioning System (GPS) units should be converted to information that can be analyzed for land management. A reliable, efficient and accurate GIS embedded Web application was designed by using crop damage assessment as a case study. HTML, Javascript and PHP were used for the development. Web Component, GIS Component and Database Component are the three main components of the application. Accuracy of data were verified by using four methods. The developed damage assessment tool was designed to store and process field data related to crop damage and to visualize map information to evaluate a crop damage. Incorporation of layers include both raster and vector data. Main functions of the applications are I. Upload coordinates and relevant photographs II. Convert polygons into polygons III. Browse for maps and photographs IV. Visual and value comparison of polygons of pre and post damage extent. Higher accuracy level of locating, efficiency and accuracy of data entering through direct capture, remote access facilities, and easy to use functions are the benefits of using this application.