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John Prince Soundranayagam1 Chandrasekar. N1 Sivasubramanian. P2 And Divya.C3 1.Centre for GeoTechnology Manonmaniam Sundaranar University 2. V.O.Chidambaram College, Tuticorin 3. The Center for information Technology Manonmaniam Sundaranar University, An Analysis Of Land Use And Land Cover Change Of Tuticorin, Tamilnadu Using Internet Gis
INTRODUCTION The Internet is a Virtual trove of information. Any kind of information on any topic under the Sun is available on the Internet. The World Wide Web (W3). Internet GIS is a research tool that facilitate to access, process and dissemination of geographic information and spatial analysis knowledge
WEB GIS With WebGIS, users do not need to purchase and install expensive GIS software in order to access and work with maps and databases. Also, users do not need to become experts in sophisticated GIS applications, since the functionality is made available through a regular web browser and an integrated Viewer with a simple, user-friendly interface. The focus of the paper is to demonstrate how WEBGIS technology can be employed for spatial data collection.
CLIENT /SERVER Web GIS is a client server concept. We are using the Internet Map Server and Web Server to host the designed web site. ArcIMS is a solution for delivering dynamic maps and GIS data and services via the Web. It provides a highly scalable framework for GIS Web publishing. Using ArcIMS, city and local governments, businesses, and other organizations worldwide share geospatial information both internally and to the public.
WEB SERVER A web server can be referred to as either the hardware (the computer) or the software (the computer application) that helps to deliver content that can be accessed through the internet. Most people think a web server is just the hardware computer, but a web server is also referred to as the software computer application that is installed in the hardware computer. The most common use of web servers are to host websites but there are other uses like data storage or for running enterprise applications. There are also different ways to request content from a web server. The most common request is the Hypertext Transfer Protocol (HTTP), but there are also other requests like the Internet Message Access Protocol (IMAP) or the File Transfer Protocol (FTP).
Methodology PREPARATION OF BASIC SPATIAL DATA The LULC map of Tuticorin for the year 2003 was prepared using LISS III satellite data by using supervised classification method for the purpose of developing WEB GIS. The Tuticorin topomaps (1969) were digitized and the extent of the Settlement, saltpan, wasteland, Agricultural land and Water bodies were extracted using ArcGIS 9.2 software
ARCIMS ArcIMS is used in developing the GIS web-base application as it is an Internet Map Server software which provides the components required for web development such as authoring, designing, publishing and administering Internet mapping application. It allows web clients, map server, data server and Web Server to communicate between one another. Through ArcIMS, developers are able to build the web-based GIS faster and manage MapService over the internet.
Deigning a web site Author Administrator Designer
ARC IMS - AUTHOR ArcIMS Author to create a map for our Web site by performing such tasks as adding data layers, setting layer symbology and creating stored queries. Author always saves your map content in a configuration file with the .axl file extension.
ADMINISTRATOR The Administrator can create, start, stop, and remove services. Administrator can set and change service properties, such as the Virtual Server assignment. Administrator also lets you work with servers (map server, image server and feature server).
Designer ArcIMS Designer is an application that guides you through the viewer design process. One can design the web page using HTML or JAVA. In the java, designer can create a web page using java standard or java custom tool sets. Most of the tools do not appear if you choose the Java Standard. In the present study, we design the website to display the layers such as Settlement, Saltpan, Agricultural, Waste land and Water bodies for the year 1969 and 2003 using HTML
Viewer The HTML Viewer The Java Standard and Custom Viewers
Land-use and land-cover change (LULCC) • Humans have been modifying the surface of the earth rapidly for their needs such as food, settler and other essentials. • These changes encompass the greatest environmental concerns of human populations today, including climate change, biodiversity loss and the pollution of water, soils and air. • Monitoring and mediating the negative consequences of LULCC while sustaining the production of essential resources has therefore become a major priority of researchers and policymakers around the world. • Keeping these perspectives an, attempt has been made to analysis the land use and land cover changes that have taken place from 1969 to 2003
tool bar Viewer
Identify tool Identify Tool Attribute table for the selected land type
Identify tool Layer/Legend Toggle
Query tool Query tool is one of the best option in the web based LIST, The Query is written using SQL (structured query language). We can use Query with logic algorithm and basic arithmetic functions. The query function is used to select the particular soil type as shown Query Tool Results for the Selected Query
BUFFER TOOL Buffer Tool selects the features of one layer that are within the specified buffer distance of selected features of another layer. The buffer zone created for the particular Road map
MEASURE TOOL Suppose if the user wants to measure the distance between two points or a path way, Measure Tool is used
Overlay Operation in change detection Study The overlaying operation of change detection analyze is very essential to determine what is exactly changing to what land use class changing to other. This information will be a vital tool in management decision Click here by using identify tool to select a polygon Select the Settlement layer for the year 1969 and 2003 Area of the settlement for the selected polygon for 1969
OVERLAY OPERATION IN CHANGE DETECTION STUDY Click here by using identify tool to select a polygon Select the Settlement layer for the year 1969 and 2003 Area of the settlement for the selected polygon for 2003
Analysis Attempts were made to capture as accurate as possible land use and land cover as they change through time. Tuticorin has witnessed remarkable expansion, growth and development activities such as urban sprawl development and conversion of land into settlement, Industrial area and saltpan. Mostly the contributors for the development are identified as waste land. During the development the salt pans and some settlement near the cost, sand dunes and palaeo strandlines were demolished. These above said structures are storage tanks of freshwater in coastal aquifers. So the demolition of these structures leads to cause strain in coastal aquifer systems.
Conclusion The WEB GIS is found to be very useful in monitoring the urban growth of a thickly populated and rapidly increasing city like Tuticorin. WEB GIS acts as an important tools for the developers and planners to extract Spatial data of their interest.