The present study involved the utilization of crushed glass as an auxiliary additive in the manuf... more The present study involved the utilization of crushed glass as an auxiliary additive in the manufacture of cement stabilized fly ash (CSF) bricks. The bricks were made with 1:1 proportion of fly ash and sand stabilized with 20 % cement. Crushed glass was used as replacement for the fine aggregate in increments of 10 % up to 40 % wherein the sand was completely replaced with crushed glass. The various mix proportions were then moulded into bricks with the addition of water by hand moulding method of forming the bricks and sun dried followed by sprinkle curing over a period of 21 days. The bricks were then subjected to compressive strength, water absorption and efflorescence tests to gauge its performance. The investigation revealed that the addition of crushed glass to the brick mix resulted in an increase in strength of the bricks, however, the maximum strength achieved could not achieve the strength of the control specimen. But the strength was higher than the minimum strength recommended by Bureau of Indian Standards (BIS) for stabilized blocks as well as burnt bricks. It also reduced the water absorption marginally while no efflorescence was seen in any of the combinations. A cost comparison revealed that the optimal combination with crushed glass was able reduce the cost of the brick by 20 %.
The Pulicat Lake is the second largest brackish water lake after Chilika Lake in India. The avera... more The Pulicat Lake is the second largest brackish water lake after Chilika Lake in India. The average area of the water spread is 461 sq km. During the monsoon Pulicat Lake receives freshwater through three major rivers, namely, the Swarnamukhi, the Kalangi and the Arani .The Pulicat lagoon system, which is a storehouse of rich biological resources, is under great threat because of the anthropogenic influences. The Pulicat Lake ecosystem is degraded by siltation, bar mouth dynamics, shell mining and processing and population pressure due to the resettlement of villagers from Sriharikota Island. It has been determined that the extent of the lake, including its water spread area, is decreasing. Therefore, it is essential to assess the land use / land cover changes taking place in and around Pulicat Lake using remote sensing and GIS. Studies on its sediment characteristics are also vital. The grain size content reveals that most of the sediments contain clay and silt in enormous amounts. This lake has been the prime source of a livelihood through fishing for a large section of the population living in the surrounding villages. It is the most important refuge for water birds in south India. The fishing community who lives in and around Pulicat Lake follows the Padu system for fishing in the lake. In this study, apart from studies on configuration changes and sediment analysis, a study of the flora and fauna of the lake and the socioeconomic conditions of the local community were also carried out. Finally, mitigation measures for the sustainable protection of the lake's ecosystem were identified.
Traffic Impact Studies (TIS) are needed due to the increasing levels of congestion in growing are... more Traffic Impact Studies (TIS) are needed due to the increasing levels of congestion in growing areas, particularly those that are located within the boundaries of large urban areas. In an attempt to control unplanned growth and unmanageable loads of traffic, traffic impact studies became a requirement to examine whether the rail network surrounding a proposed development will be able to handle the additional traffic while still offering acceptable levels of service. The TIS is a part of the Environmental Impact Statement (EIS) of the proposed development. The main objective of this study is to find the changes in the land use pattern using multi-temporal data, to analyze the factors that affect the traffic flow of the MRTS in each station and to identify the new rail corridor between velachery and St.ThomasMount. The IRS and the IKONOS PAN data are obtained for the years 1996 and 2006, and the geometric correction is done. The land use maps are prepared from the obtained satellite data for the years 1996 and 2006. The land use maps were overlaid to find the changes in the land use between the two years. The changes in the type of land use are obtained from the GIS overlay analysis. The accessibility of each MRTS station to the bus stop is also analyzed and correlated with the present number of passengers using the station. The possibility of connecting the roads having more traffic capacity between velachery and St.Thomas Mount to determine a new route using the GIS based heuristic algorithm has been explored. The built up lands and the type of soil also considered in finalizing the route. The details of the new route are given in the paper. KEY WORDS: IKONOS pan, IRS pan, MRTS, TIS.
Our urban areas are growing rapidly and require planning and adequate servicing to avoid problems... more Our urban areas are growing rapidly and require planning and adequate servicing to avoid problems associated with unplanned and adhoc growth. Planning so far has been a time consuming activity and by the time a plan is prepared and implemented. A part of the delay can be attributed to the current status of data (outdated maps, lack of information), data collection & analysis and techniques employed to prepare plans. Another aspect with the current methods is that it is not easy to make rational and informed planning decisions. Rapid planning and enable taking rational and informed planning decisions that ultimately lead to plans that are better and implementable. Satellite imagery and use of Geographical Information System (GIS) are examples of such tools that facilitate preparation of rapid, comprehensive, rational and implementable plans. Our project attempts to highlight the potential of these techniques with a preparation of Satellite Township planning at Thirumazhisai.
Introduction Soil is the unaggregated or uncemented deposits of mineral and organic particles or ... more Introduction Soil is the unaggregated or uncemented deposits of mineral and organic particles or fragments covering large portion of the earth's crust. It includes widely different materials like boulders, sands, gravels, clays and silts. The external layer of the earth 'soil' is formed by weathering of rocks. That parent rocks have different properties in the aspects of physical, chemical and biological. So, the soil is also having different physical (colour, texture and structure), chemical (minerals) and biological (organic and inorganic matters) properties. Index properties refer to those soil properties that indicate the type and condition of a soil and are the basis for determining a soil's classification. The tests necessary to determine index properties are known as classification tests. They also provide a relationship to the structural properties of soils, such as the strength and compressibility or tendency for swelling and permeability. These index properties will have a bearing on items of engineering importance such as load-supporting ability, tendency to settle or expand, and the effect of water and freezing conditions. It is not necessary to determine all the index properties for every soil on a construction project. Engineering judgment must be exercised to determine the scope of testing, how much information is needed and how much will be used. Index properties include the range of particle sizes and distribution of sizes, shape of particle sizes, and presence of fine-grained particles, in-place density and relative density, consistency, water content, plasticity, the presence and type of clay. It is necessary to have some index properties of soil (Texture, Liquid limit, Plastic limit) for any type of further analysis of soil for site investigation & geo technical analysis. This study concern with development of soil index properties data information system using Geographical Information System (GIS). It is used to develop this information system with those soil spatial details.Soil information can be contained texture, PH values, Carbonate, Exchangeable cat ions, nutrient contents (The European Soil Information System).GIS Can Be Used to Develop Soil Data
Among the various natural resources, water holds the place as the most important one, which is es... more Among the various natural resources, water holds the place as the most important one, which is essential for the sustenance of life and as well as for the economic development of a nation. Unfortunately, this precious natural resource is not uniformly and adequately distributed. In such circumstances, groundwater assumes greater significance both for agriculture and industrial development. But, at the same time over dependence on groundwater often leads to serious ecological and environmental problems like groundwater depletion, desertification low fertility of the soil etc. In addition it has become ever more difficult to locate a potential aquifer through conventional methods. Tamil Nadu is among the most water starved states within the country owing to the absence of perennial rivers, poor rainfall and also due to scanty surface water resources. As a result, more than 60% of its total area comes under the semiarid regions. Though, semiarid regions are handicapped by poor rainfall, soil erosion and active weathering conditions, these regions tend to be highly productive once proper management plans are carried out. Towards the same, watershed based Integrated Management plans can be very effective. Hence, in the present study, an attempt has been made to bring out the groundwater potential of Adayar river basin. Using conventional and modern technologies like Remote Sensing and GIS, terrain elements of the Adayar basin were subjected to critical analysis. Through, visual interpretation of IRS 1C satellite 1174 S.D.Anitha Selvasofia et al data, thematic maps like geology, geomorphology, land use / land cover etc. were prepared. Subsequently, these maps were integrated using GIS with the other terrain parameters like slope, drainage, hydrological infiltration capacity etc. to derive the hydro-geomorphology map of the basin. The prepared hydro-geomorphology map shows the groundwater potential of the basin which can be used as a base line data for groundwater exploration and also for framing various sustainable watershed management plans. 1 INTRODUCTION For a developing country like India with its huge population and its ever increasing demand for natural resources has already created serious environmental problems like groundwater depletion, salt water intrusion into coastal aquifers, deforestation, desertification etc. Besides this problems are expected to get aggravated in the near future. Hence sustainable management of the natural resources has greater significance for our country. The state of Tamil Nadu is notoriously famous for water scarcity conditions. As per world resources report if the per capita availability of water is 1700 cu.m / year, then the country is considered to be under " water stress " condition and if the same is in the order of 1000 cu.m / year, then the country is considered to be under " water scarcity " condition. The per capita availability of water in Tamil Nadu is just around 600 cu.m / year therefore the state can be characterized to be under the severe water scarcity conditions. To worsen the matter, the Tamil Nadu state has only scanty surface water resources and no perennial rivers. Hence, it depends heavily on ground water has already created serious environmental problems and ground water level in most parts of the state has dipped alarmingly in the recent decades forcing the Govt. of Tamil Nadu to take serious measures like rain water harvesting etc. to improve the situation. As a result, it has become ever more difficult to locate a productive aquifer in the drought prone semiarid areas through conventional groundwater survey methods. In addition, the falling groundwater level has further accelerated problems like desertification, poor fertility conditions of the soil etc. in these regions. Hence, these regions urgently demand the serious attention of the planners for its eco-restoration. Towards attaining the same, watershed based integrated management practices can be very effective and the same is currently practiced worldwide to reclaim the environmentally affected area and restore its ecological balance. Watershed provides a natural morphological boundary within which planning and execution of various watershed management activities become easier. Currently, watershed management plans are practiced universally and that too for a developing country like India, where more than 60% of population is engaged in agricultural sector this approach plays a significant role. Integrated watershed management implies optimum usage of natural resources of an area so that ecological balance within that area did not get disturbed.
The miniaturization of GPS receivers and computing devices has evolved the technique of mobile ma... more The miniaturization of GPS receivers and computing devices has evolved the technique of mobile mapping. In this technique, any mobile computing device, like laptop, running a mobile GIS software, is connected to a mobile GPS like Pretec card GPS with or without external antenna. The mobile GIS software can be any like Arc PAD from ESRI. The base map of the area can be loaded at the background, over which the GPS and other spatial data could be collected through an easy to use user interface. The data is stored in its own proprietary format and can be exported to the popular formats like Arc View.shp and MapInfo.tab.ESRI ArcPad software is used for mobile GIS and field mapping applications. ArcPad provides mapping, GIS, and GPS integration to field users via handheld and mobile devices. Data collection with Arc Pad is fast and easy with field-based data validation and availability. Arc Pad integrates with ArcGIS and other enterprise information technology. This project deals with latest form of GIS i.e., Mobile GIS. The information system developed using Mobile GIS makes it possible to integrate other technologies which are used with spatial data, for example an automated system that displays facilities and details of medical information system. In this context GIS could be called as a "system integrator". The final information system is termed as "web based hospital Information system of Adyar. An web Information System giving all necessary details about the 1180 S. D. Anitha Selvasofia et al hospitals over the particular area of Adyar is made useful for the present public. 1 Introduction Mobile GIS is the combination of geographic information system (GIS) software, global positioning systems (GPS), and mobile computing devices. Mobile GIS fundamentally changes the way information is collected, used in the field, and shared with the rest of an organization. A mobile GIS allows you to visualize information in a digital map, collect information where you observe it, and interact directly with the world around you, while improving productivity and data accuracy. The recent developments in mobile GIS technologies have benefited many field-based information gathering and use tasks by increasing the efficiency and accuracy with which field workers collect and use information. Single frequency code measurement GPSs and availability of carrier phase measurement facility on these single frequency GPS receivers has led to the entry of GPS for spatial data collection for the GIS projects. These receivers are of medium accuracies, of the order of sub-meter to few meter accuracy levels, and are being used in almost all GIS project, these days. The use of GPS has virtually removed the conventional surveying methods being used in the GIS projects. This has become possible due to the decrease in the price of GPS receivers and the removal of S/A. A Geographic Information System is a graphic representation and a textual description of a geographic location. GIS provides the decision maker with a logical and graphic representation of geographically referenced information. GIS can maintain, analyze, and report on geographical data, such as points and symbols, lines and curves or polygons, attribute data, such as: characters, numbers or dates. GIS provides a powerful, logical, and intuitive means to store, manipulate, and retrieve data. It provides the ability to see on screen or in map form, only those features or objects that meet specific selection criteria. This project is aimed in developing a Medical Information System using Mobile based GIS so that the limitation of use for only domestic users in specific area is overcome. In addition, it makes to verify the efficiency of this system as comparing with traditional systems. Moreover, even general users can grasp geographic information visually by searching spatial data with its attribute data
Changes in Land use and land Cover is a dynamic process taking place on the surface, and the spat... more Changes in Land use and land Cover is a dynamic process taking place on the surface, and the spatial distribution of the changes that have taken place over a period of time and space is of immense importance in many a natural resources studies. Landuse/land cover mapping serves as a basic inventory of land resources throughout the world. Whether regional or local in scope, remote sensing offers a means of acquiring and presenting land cover data in timely manner. In recent years remote sensing and geographical information system have gained importance as vital tools in the analysis of change detection at district and city level. This paper describes the changes in Land use/land cover pattern of Coimbatore District in Tamil Nadu State in between 2000& 2010 so as to detect the changes that has taken place in this status between these periods using Landsat Images of 2000 and 2010. This study links with socioeconomic change of Coimbatore in that period. The result of this work will show a rapid growth in land use of Coimbatore in the period of 2000 & 2010.
The present study involved the utilization of crushed glass as an auxiliary additive in the manuf... more The present study involved the utilization of crushed glass as an auxiliary additive in the manufacture of cement stabilized fly ash (CSF) bricks. The bricks were made with 1:1 proportion of fly ash and sand stabilized with 20 % cement. Crushed glass was used as replacement for the fine aggregate in increments of 10 % up to 40 % wherein the sand was completely replaced with crushed glass. The various mix proportions were then moulded into bricks with the addition of water by hand moulding method of forming the bricks and sun dried followed by sprinkle curing over a period of 21 days. The bricks were then subjected to compressive strength, water absorption and efflorescence tests to gauge its performance. The investigation revealed that the addition of crushed glass to the brick mix resulted in an increase in strength of the bricks, however, the maximum strength achieved could not achieve the strength of the control specimen. But the strength was higher than the minimum strength recommended by Bureau of Indian Standards (BIS) for stabilized blocks as well as burnt bricks. It also reduced the water absorption marginally while no efflorescence was seen in any of the combinations. A cost comparison revealed that the optimal combination with crushed glass was able reduce the cost of the brick by 20 %.
The Pulicat Lake is the second largest brackish water lake after Chilika Lake in India. The avera... more The Pulicat Lake is the second largest brackish water lake after Chilika Lake in India. The average area of the water spread is 461 sq km. During the monsoon Pulicat Lake receives freshwater through three major rivers, namely, the Swarnamukhi, the Kalangi and the Arani .The Pulicat lagoon system, which is a storehouse of rich biological resources, is under great threat because of the anthropogenic influences. The Pulicat Lake ecosystem is degraded by siltation, bar mouth dynamics, shell mining and processing and population pressure due to the resettlement of villagers from Sriharikota Island. It has been determined that the extent of the lake, including its water spread area, is decreasing. Therefore, it is essential to assess the land use / land cover changes taking place in and around Pulicat Lake using remote sensing and GIS. Studies on its sediment characteristics are also vital. The grain size content reveals that most of the sediments contain clay and silt in enormous amounts. This lake has been the prime source of a livelihood through fishing for a large section of the population living in the surrounding villages. It is the most important refuge for water birds in south India. The fishing community who lives in and around Pulicat Lake follows the Padu system for fishing in the lake. In this study, apart from studies on configuration changes and sediment analysis, a study of the flora and fauna of the lake and the socioeconomic conditions of the local community were also carried out. Finally, mitigation measures for the sustainable protection of the lake's ecosystem were identified.
Traffic Impact Studies (TIS) are needed due to the increasing levels of congestion in growing are... more Traffic Impact Studies (TIS) are needed due to the increasing levels of congestion in growing areas, particularly those that are located within the boundaries of large urban areas. In an attempt to control unplanned growth and unmanageable loads of traffic, traffic impact studies became a requirement to examine whether the rail network surrounding a proposed development will be able to handle the additional traffic while still offering acceptable levels of service. The TIS is a part of the Environmental Impact Statement (EIS) of the proposed development. The main objective of this study is to find the changes in the land use pattern using multi-temporal data, to analyze the factors that affect the traffic flow of the MRTS in each station and to identify the new rail corridor between velachery and St.ThomasMount. The IRS and the IKONOS PAN data are obtained for the years 1996 and 2006, and the geometric correction is done. The land use maps are prepared from the obtained satellite data for the years 1996 and 2006. The land use maps were overlaid to find the changes in the land use between the two years. The changes in the type of land use are obtained from the GIS overlay analysis. The accessibility of each MRTS station to the bus stop is also analyzed and correlated with the present number of passengers using the station. The possibility of connecting the roads having more traffic capacity between velachery and St.Thomas Mount to determine a new route using the GIS based heuristic algorithm has been explored. The built up lands and the type of soil also considered in finalizing the route. The details of the new route are given in the paper. KEY WORDS: IKONOS pan, IRS pan, MRTS, TIS.
Our urban areas are growing rapidly and require planning and adequate servicing to avoid problems... more Our urban areas are growing rapidly and require planning and adequate servicing to avoid problems associated with unplanned and adhoc growth. Planning so far has been a time consuming activity and by the time a plan is prepared and implemented. A part of the delay can be attributed to the current status of data (outdated maps, lack of information), data collection & analysis and techniques employed to prepare plans. Another aspect with the current methods is that it is not easy to make rational and informed planning decisions. Rapid planning and enable taking rational and informed planning decisions that ultimately lead to plans that are better and implementable. Satellite imagery and use of Geographical Information System (GIS) are examples of such tools that facilitate preparation of rapid, comprehensive, rational and implementable plans. Our project attempts to highlight the potential of these techniques with a preparation of Satellite Township planning at Thirumazhisai.
Introduction Soil is the unaggregated or uncemented deposits of mineral and organic particles or ... more Introduction Soil is the unaggregated or uncemented deposits of mineral and organic particles or fragments covering large portion of the earth's crust. It includes widely different materials like boulders, sands, gravels, clays and silts. The external layer of the earth 'soil' is formed by weathering of rocks. That parent rocks have different properties in the aspects of physical, chemical and biological. So, the soil is also having different physical (colour, texture and structure), chemical (minerals) and biological (organic and inorganic matters) properties. Index properties refer to those soil properties that indicate the type and condition of a soil and are the basis for determining a soil's classification. The tests necessary to determine index properties are known as classification tests. They also provide a relationship to the structural properties of soils, such as the strength and compressibility or tendency for swelling and permeability. These index properties will have a bearing on items of engineering importance such as load-supporting ability, tendency to settle or expand, and the effect of water and freezing conditions. It is not necessary to determine all the index properties for every soil on a construction project. Engineering judgment must be exercised to determine the scope of testing, how much information is needed and how much will be used. Index properties include the range of particle sizes and distribution of sizes, shape of particle sizes, and presence of fine-grained particles, in-place density and relative density, consistency, water content, plasticity, the presence and type of clay. It is necessary to have some index properties of soil (Texture, Liquid limit, Plastic limit) for any type of further analysis of soil for site investigation & geo technical analysis. This study concern with development of soil index properties data information system using Geographical Information System (GIS). It is used to develop this information system with those soil spatial details.Soil information can be contained texture, PH values, Carbonate, Exchangeable cat ions, nutrient contents (The European Soil Information System).GIS Can Be Used to Develop Soil Data
Among the various natural resources, water holds the place as the most important one, which is es... more Among the various natural resources, water holds the place as the most important one, which is essential for the sustenance of life and as well as for the economic development of a nation. Unfortunately, this precious natural resource is not uniformly and adequately distributed. In such circumstances, groundwater assumes greater significance both for agriculture and industrial development. But, at the same time over dependence on groundwater often leads to serious ecological and environmental problems like groundwater depletion, desertification low fertility of the soil etc. In addition it has become ever more difficult to locate a potential aquifer through conventional methods. Tamil Nadu is among the most water starved states within the country owing to the absence of perennial rivers, poor rainfall and also due to scanty surface water resources. As a result, more than 60% of its total area comes under the semiarid regions. Though, semiarid regions are handicapped by poor rainfall, soil erosion and active weathering conditions, these regions tend to be highly productive once proper management plans are carried out. Towards the same, watershed based Integrated Management plans can be very effective. Hence, in the present study, an attempt has been made to bring out the groundwater potential of Adayar river basin. Using conventional and modern technologies like Remote Sensing and GIS, terrain elements of the Adayar basin were subjected to critical analysis. Through, visual interpretation of IRS 1C satellite 1174 S.D.Anitha Selvasofia et al data, thematic maps like geology, geomorphology, land use / land cover etc. were prepared. Subsequently, these maps were integrated using GIS with the other terrain parameters like slope, drainage, hydrological infiltration capacity etc. to derive the hydro-geomorphology map of the basin. The prepared hydro-geomorphology map shows the groundwater potential of the basin which can be used as a base line data for groundwater exploration and also for framing various sustainable watershed management plans. 1 INTRODUCTION For a developing country like India with its huge population and its ever increasing demand for natural resources has already created serious environmental problems like groundwater depletion, salt water intrusion into coastal aquifers, deforestation, desertification etc. Besides this problems are expected to get aggravated in the near future. Hence sustainable management of the natural resources has greater significance for our country. The state of Tamil Nadu is notoriously famous for water scarcity conditions. As per world resources report if the per capita availability of water is 1700 cu.m / year, then the country is considered to be under " water stress " condition and if the same is in the order of 1000 cu.m / year, then the country is considered to be under " water scarcity " condition. The per capita availability of water in Tamil Nadu is just around 600 cu.m / year therefore the state can be characterized to be under the severe water scarcity conditions. To worsen the matter, the Tamil Nadu state has only scanty surface water resources and no perennial rivers. Hence, it depends heavily on ground water has already created serious environmental problems and ground water level in most parts of the state has dipped alarmingly in the recent decades forcing the Govt. of Tamil Nadu to take serious measures like rain water harvesting etc. to improve the situation. As a result, it has become ever more difficult to locate a productive aquifer in the drought prone semiarid areas through conventional groundwater survey methods. In addition, the falling groundwater level has further accelerated problems like desertification, poor fertility conditions of the soil etc. in these regions. Hence, these regions urgently demand the serious attention of the planners for its eco-restoration. Towards attaining the same, watershed based integrated management practices can be very effective and the same is currently practiced worldwide to reclaim the environmentally affected area and restore its ecological balance. Watershed provides a natural morphological boundary within which planning and execution of various watershed management activities become easier. Currently, watershed management plans are practiced universally and that too for a developing country like India, where more than 60% of population is engaged in agricultural sector this approach plays a significant role. Integrated watershed management implies optimum usage of natural resources of an area so that ecological balance within that area did not get disturbed.
The miniaturization of GPS receivers and computing devices has evolved the technique of mobile ma... more The miniaturization of GPS receivers and computing devices has evolved the technique of mobile mapping. In this technique, any mobile computing device, like laptop, running a mobile GIS software, is connected to a mobile GPS like Pretec card GPS with or without external antenna. The mobile GIS software can be any like Arc PAD from ESRI. The base map of the area can be loaded at the background, over which the GPS and other spatial data could be collected through an easy to use user interface. The data is stored in its own proprietary format and can be exported to the popular formats like Arc View.shp and MapInfo.tab.ESRI ArcPad software is used for mobile GIS and field mapping applications. ArcPad provides mapping, GIS, and GPS integration to field users via handheld and mobile devices. Data collection with Arc Pad is fast and easy with field-based data validation and availability. Arc Pad integrates with ArcGIS and other enterprise information technology. This project deals with latest form of GIS i.e., Mobile GIS. The information system developed using Mobile GIS makes it possible to integrate other technologies which are used with spatial data, for example an automated system that displays facilities and details of medical information system. In this context GIS could be called as a "system integrator". The final information system is termed as "web based hospital Information system of Adyar. An web Information System giving all necessary details about the 1180 S. D. Anitha Selvasofia et al hospitals over the particular area of Adyar is made useful for the present public. 1 Introduction Mobile GIS is the combination of geographic information system (GIS) software, global positioning systems (GPS), and mobile computing devices. Mobile GIS fundamentally changes the way information is collected, used in the field, and shared with the rest of an organization. A mobile GIS allows you to visualize information in a digital map, collect information where you observe it, and interact directly with the world around you, while improving productivity and data accuracy. The recent developments in mobile GIS technologies have benefited many field-based information gathering and use tasks by increasing the efficiency and accuracy with which field workers collect and use information. Single frequency code measurement GPSs and availability of carrier phase measurement facility on these single frequency GPS receivers has led to the entry of GPS for spatial data collection for the GIS projects. These receivers are of medium accuracies, of the order of sub-meter to few meter accuracy levels, and are being used in almost all GIS project, these days. The use of GPS has virtually removed the conventional surveying methods being used in the GIS projects. This has become possible due to the decrease in the price of GPS receivers and the removal of S/A. A Geographic Information System is a graphic representation and a textual description of a geographic location. GIS provides the decision maker with a logical and graphic representation of geographically referenced information. GIS can maintain, analyze, and report on geographical data, such as points and symbols, lines and curves or polygons, attribute data, such as: characters, numbers or dates. GIS provides a powerful, logical, and intuitive means to store, manipulate, and retrieve data. It provides the ability to see on screen or in map form, only those features or objects that meet specific selection criteria. This project is aimed in developing a Medical Information System using Mobile based GIS so that the limitation of use for only domestic users in specific area is overcome. In addition, it makes to verify the efficiency of this system as comparing with traditional systems. Moreover, even general users can grasp geographic information visually by searching spatial data with its attribute data
Changes in Land use and land Cover is a dynamic process taking place on the surface, and the spat... more Changes in Land use and land Cover is a dynamic process taking place on the surface, and the spatial distribution of the changes that have taken place over a period of time and space is of immense importance in many a natural resources studies. Landuse/land cover mapping serves as a basic inventory of land resources throughout the world. Whether regional or local in scope, remote sensing offers a means of acquiring and presenting land cover data in timely manner. In recent years remote sensing and geographical information system have gained importance as vital tools in the analysis of change detection at district and city level. This paper describes the changes in Land use/land cover pattern of Coimbatore District in Tamil Nadu State in between 2000& 2010 so as to detect the changes that has taken place in this status between these periods using Landsat Images of 2000 and 2010. This study links with socioeconomic change of Coimbatore in that period. The result of this work will show a rapid growth in land use of Coimbatore in the period of 2000 & 2010.
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Papers by Saraswathy Rajasekaran