Electrical surveying • Resistivity method • Induced polarization method (IP) • Selfpotential (SP) method Higher frequency methods (electromagnetic surveys) • Electromagnetic induction methods • Ground penetrating radar (GPR)35 336 WING POINT METHOD This is the preferred method for all projects because of the greater accuracy that can be obtained (Refer to Appendix Figure 6 for an example) Set the wing points near the midpoint of the project, approximately 2 km (1 mi) to 5 km (3 mi) left and right of the proposed centerline The maximum length of anyThe single prismatic square and the double prismatic square used to set out both right angles and perpendicular lines
A Shortcut To Square The 3 4 5 Method Youtube