Conformal Analysis of Spatial Shift in High Resolution Satellite Data (HRSD)
- 1 Department of Civil Engineering, Visvesvaraya National Institute of Technology, Nagpur, India
- 2 Department of Civil Engineering, Visvesvaraya National Institute of Technology, Nagpur, India
- 3 ImaGIS Engineering Solutions Pvt. Ltd. Nagpur, India
Abstract
Advent of High Resolution Satellite Data (HRSD) with development of high spatial resolution sensors have revolutionized the generation of large scale maps. Generation of large scale digital utility maps using HRSD involves different methodologies and includes several steps wherein errors or spatial shift may be induced at any stage of data generation. It may be interesting to note that the characteristics of the spatial shift vary with methodologies adopted in its processing and has unique implications with respect to the data usage along with its application. Spatial shifts of points on a satellite data is result of unexpected translation and rotation of pixel with respect to the original location. Present study analyzes the spatial shift generated in satellite data with reference to the change in area and orientation of a group of pixels i.e. conformal and equal area properties of the rectified satellite data. This study aims to establish a relationship between the spatial resolutions of the satellite image used for digital map generation with the spatial accuracy achieved. In this study, Ground Control Points (GCP’s) identified on satellite data for a sample study area were validated using Differential Global Positioning System. Five different high resolution satellite images were analyzed to verify changes in area and shape with reference to the GCP’s. The results indicate that with improvement in the spatial resolution, higher precision in the digital maps is accomplished in terms of spatial shift of the points.
- E. F. Burkholder, “Spatial Data Coordinate Systems and the Science of Measurement,” Journal of Surveying Engineering, Vol. 127, No. 4,2001, pp. 143-156. doi:10.1061/(ASCE)0733-9453(2001)127:4(143)
- V. K. Srivastav, “Significance of Global Positioning System (GPS) Measurements in Geo-Referencing of Remote Sensing Images an Input in GIS,” Proceedings of the Asian GPS Conference, New Delhi, 29-30 October 2001.
- P. Nag and M. Kudrat, “Digital Remote Sensing,” Concept Publishing Company, New Delhi, 1998.
- R. S. Rathi and R. R. Vatsvani, “Digital Mapping of Urban/Sub-Urban Environment of Dehradun Using SPOT Data,” In: B. S. Sokhi and S. M. Rashid, Eds., Remote Sensing of Urban Environment, 1999, pp. 123-136.
- H. Hild, “Automatic Image-to-Map-Registration of Remote Sensing Data,” Photogrammetric Week, 13-23 January 2001.
- A. Shaker, W. Shi and H. Bharakat, “Assessment of the Rectification Accuracy of Ikonos Imagery Based on Two- Dimensional Models,” International Journal of Remote Sensing, Vol. 26, No. 4, 2005, pp. 719-731. doi:10.1080/01431160512331316847
- J. Greenfeld, “Evaluating the Accuracy of Digital Orthophoto Quadrangles (DOQ) in the Context of Parcel-Based GIS,” Photogrammetric Engineering and Remote Sensing, Vol. 67, No. 2, 2001, pp. 199-205.
- Indian Space Research Organisation, “Urban Planning Using IRS-1C Data,” ISRO, Bangalore, 2005.
- A. Bannister, R. Stanley and R. Baker, “Surveying,” Pearson Education, India, 2006.
- Y. B. Katpatal and R. S. Mane, “Minimizing the Edge Distortions in Spatial Representation of Standard UTM Zones Using GPS: A Case Study,” Proceedings of the International Conference on Location Intelligence, New Delhi, 2-4 May 2005.