i have worked on watershed management of uttar pradesh india, i used the tool like autocad,google earth pro, and global mapper 20. we take elevation points of the road from the Differential Global Positioning System (DGPS), from that data by using autocad we used the draw the roads, after that, from the autocad dwg file by using global mapper 20 we have to convert that dwg file to kmz file, to draw the buildings, water bodies in google earth pro, completion of kmz file we have convert into dwg file and paste the buildings and water bodies drawing in autocad file,