Others in the party are survey technicians, assistants, and helpers, and laborers. New technology is changing the nature of the work. This is a satellite system that locates points on earth using radio signals. Surveyors may specialize in one type of survey. Marine or hydrographic surveyors survey harbors, rivers, and other bodies of water to determine shorelines, water depth, and other features.
Geodetic surveyors use high-accuracy techniques.
This includes satellite observations. These are used to measure large areas of the earth's surface. Geophysical prospecting surveyors mark sites below the ground. They do this for exploration that is related to oil and gas. Mapping scientists measure, map, and chart large areas of the earth's surface.