In the architecture world gps is truly crucial. In my internship I have had experience with this. For example my employer and I were deciding on how to layout a very intrinsic stone wall layout over all types of slopes. It is not easy to go into the field and try to make markers on a site with lots of slopes. Our biggest concern was starting in the right place but the furthest end point to be off. In this example a gps was used to create this accuracy. Honesty, without the gps the contractors would have not been able to make the correct layout. Also, my boss was working on a golf course reconstruction and a gps was crucial once again when dealing with the water line. It is quite remarkable how gps allows for intrinsic projects and ideas to be conducted.