cET 318 h国Lce 3.3 Field Reconnaissance 3. 4 Monumentation 7. Field Surveying with GPS 3.5 Organizational design Book:p.133-179 Dr Guoqing Zhou This is a Geodetic Control Test Field located at L Radial Surveying( Cartwheel): Madison County, Central Ohio. lial Surveys: one receiver at a fixed 2 Madison County High Altitude Test Range site, and measuring lines from this fixed 米 planning this type of survey exce that points in close proximity should be connected by direct observation Survey at Different Times: the Example: error between the two points could error in the points Error would not be tolerated rror between the nce it would cause a bad two points would be 0. 14 impression on the whole accuracy. m(relative error of 1: 714) 2. Network Surveying: GPS surveys performed by static(and pseudokinematic) ethods where accuracy is a primary consideration require that observations be performed in a systematic manner and that closed geometric figures be formed to provide closed loops 4. GPS Surveying Procedure An idealized scheme in Fig. 7.5; the basic principles apply for all control netw The Major Points of Network Design The network should consist of closed loops or other geometric figures.1 Dr. Guoqing Zhou 7. Field Surveying with GPS CET 318 Book: p. 133-179 3.3 Field Reconnaissance 3.4 Monumentation 3.5 Organizational Design This is a Geodetic Control Test Field located at Madison County, Central Ohio. 1. Radial Surveying (Cartwheel): Radial Surveys: one receiver at a fixed site, and measuring lines from this fixed site to receivers placed at other locations. A 0.1 m error in the points 2 and 3. Thus, the expected error between the two points would be 0.14 m (relative error of 1:714). No Geometric Consideration for planning this type of survey except that points in close proximity should be connected by direct observation. Survey at Different Times: the error between the two points could be considerable, and Relative Error would not be tolerated since it would cause a bad impression on the whole accuracy. Example: 2. Network Surveying: GPS surveys performed by static (and pseudokinematic) methods where accuracy is a primary consideration require that observations be performed in a systematic manner and that closed geometric figures be formed to provide closed loops. An idealized scheme in Fig. 7.5; the basic principles apply for all control network schemes. The Major Points of Network Design: The network should consist of closed loops or other geometric figures. 4. GPS Surveying Procedure