5. Results and Discussion
To check the accuracy of coordinate transformation tools available in ArcGIS, the relative position of surveyed points were calculated before and after transformation using the different tools and compared to the original positions. The most upper left point was chosen as an origin and the distances from it to all other points were computed using the raw data and data after transforming the coordinates. The difference between distances to the corresponding points were calculated and represented in Figure 1 for control points acquired using geodetic GPS. Figures 2-4 represent the errors in relative positions for control points collected using Bing basemap imagery, Google Earth and Hand-held GPS respectively