Digital Elevation Models(DEM)of a hilly–valley region are prepared using stereo images of Cartosat-1 and Shuttle Radar Topography Mission(SRTM)images.The procedure of ortho-image generation from Cartosat-1 stereo ima...Digital Elevation Models(DEM)of a hilly–valley region are prepared using stereo images of Cartosat-1 and Shuttle Radar Topography Mission(SRTM)images.The procedure of ortho-image generation from Cartosat-1 stereo images and the estimation of ground features from ortho-image are elaborated in the paper.Comparison of DEMs prepared from both images is discussed in terms of the quality of ground features detection,hydrological applications and geometrical calculations.It is found that DEM prepared from Cartosat-1 images are more accurate in the valley region and hence it is better suited for hydrological applications.On the contrary,for hilly region,SRTM images produce better DEM.However,if ground control points and Rational Polynomial Coefficients can be obtained in the hilly region,more accurate DEM can be prepared using Cartosat-1 stereo images.展开更多
The objective of the study was to estimate the change detection in a surface area and volume ana- lysis of the lime stone quarry for the year 2006 and 2014 in Mannur, Tirunelveli district, Tamilnadu. Though the mining...The objective of the study was to estimate the change detection in a surface area and volume ana- lysis of the lime stone quarry for the year 2006 and 2014 in Mannur, Tirunelveli district, Tamilnadu. Though the mining activities are essential for the cement factory, it depletes the ground water table and causes pollution to the Environment. The Integration of Remote Sensing and GIS are effective for analyzing the impact of quarrying on natural resources. In this study, Cartosat-1 satellite data generated Digital Elevation Model (DEM) for measuring surface area and the volume of Lime stone quarry. Temporal volume change study is essential for the government to restrain the misuse of the natural resources by the private sector. In 2006, the surface area and volume of lime stone excavated by 8 mining quarries was 1,991,759.68 m<sup>2</sup> and 112,398,931.9 m<sup>3</sup> respectively. Meanwhile, the surface area utilized and volume of limestone production by the quarry was increased to 2,881,384.64 m<sup>2</sup> and 156,806,929.9 m<sup>3</sup> respectively during the year<sup> </sup>2014. In these 8 years period, quarry surface area utilization increased by 30% and limestone production increased by 28% was observed. This study is useful for the government to monitor the natural resources restrain to over use by the private sector.展开更多
基金The authors acknowledge Board of Research in Nuclear Sciences(BRNS),Bhabha Atomic Research Centre(BARC),Mumbai for sponsoring this project.
文摘Digital Elevation Models(DEM)of a hilly–valley region are prepared using stereo images of Cartosat-1 and Shuttle Radar Topography Mission(SRTM)images.The procedure of ortho-image generation from Cartosat-1 stereo images and the estimation of ground features from ortho-image are elaborated in the paper.Comparison of DEMs prepared from both images is discussed in terms of the quality of ground features detection,hydrological applications and geometrical calculations.It is found that DEM prepared from Cartosat-1 images are more accurate in the valley region and hence it is better suited for hydrological applications.On the contrary,for hilly region,SRTM images produce better DEM.However,if ground control points and Rational Polynomial Coefficients can be obtained in the hilly region,more accurate DEM can be prepared using Cartosat-1 stereo images.
文摘The objective of the study was to estimate the change detection in a surface area and volume ana- lysis of the lime stone quarry for the year 2006 and 2014 in Mannur, Tirunelveli district, Tamilnadu. Though the mining activities are essential for the cement factory, it depletes the ground water table and causes pollution to the Environment. The Integration of Remote Sensing and GIS are effective for analyzing the impact of quarrying on natural resources. In this study, Cartosat-1 satellite data generated Digital Elevation Model (DEM) for measuring surface area and the volume of Lime stone quarry. Temporal volume change study is essential for the government to restrain the misuse of the natural resources by the private sector. In 2006, the surface area and volume of lime stone excavated by 8 mining quarries was 1,991,759.68 m<sup>2</sup> and 112,398,931.9 m<sup>3</sup> respectively. Meanwhile, the surface area utilized and volume of limestone production by the quarry was increased to 2,881,384.64 m<sup>2</sup> and 156,806,929.9 m<sup>3</sup> respectively during the year<sup> </sup>2014. In these 8 years period, quarry surface area utilization increased by 30% and limestone production increased by 28% was observed. This study is useful for the government to monitor the natural resources restrain to over use by the private sector.
