230 - SURVEYOR, TOPOGRAPHIC
[SURVEYOR, TOPO]
Performs a variety of surveying duties in the determination of data pertaining to terrain features and topographical measurements to be used in the preparation of maps.
Sets up and operates such surveyor's instruments as transit, level, stadia, astrolabe, subtends bar, aneroid barometer, and theodolite to establish angle, distance, geographic position, and elevation of various points on the terrain. Keeps field notes of instrument observations.
Computes azimuth, position, latitude and longitude from solar and stellar observations. Computes grid coordinates from latitude and longitude. May do plane table work. May supervise a survey party. Must understand basic topographic surveying operations.
Must be competent in use of astrolabe and theodolite. Should be proficient in mathematics, including plane and spherical trigonometry. Should be able to assemble and interpret aerial photographs. Note—This SSN will be considered primary over SSN 227.