Power transmission line dip measurement method

A power transmission line dip measurement method comprising:

• a measurement instrument installation step of installing a measurement instrument at a place where power line support points of two steel towers at which a power line is to be installed can be seen;
• an input step of inputting a designed dip value into a slope dip input column on a screen of a PDA;
• a first collimation step of collimating the measurement instrument at the power line support point of one of the steel towers;
• a first transmission step of transmitting a collimated value to a personal digital assistant (PDA) in a wired or wireless manner;
• a second collimation step of collimating the measurement instrument at the power line support point of the other steel tower;
• a second transmission step of transmitting a collimated value to the PDA;
• an angle calculation step of calculating the transmitted collimated values to display a horizontal angle and a perpendicular angle of a dip base line;
• and
• a power line construction step of adjusting an angle of the measurement instrument based on the horizontal angle and the perpendicular angle displayed on a screen of the PDA by a worker, collimating the measurement instrument, and constructing a power line.