Surveying technicians typically do the following:

• Visit sites to record survey measurements and other descriptive data
• Operate surveying instruments, such as electronic distance-measuring equipment (robotic total stations), to collect data on a location
• Set out stakes and marks to conduct a survey
• Search for previous survey points, such as old stone markers
• Enter the data from surveying instruments into computers, either in the field or in an office

Surveying technicians help surveyors in the field on teams known as survey parties. A typical survey party has a party chief and one or more surveying technicians. The party chief, either a surveyor or a senior surveying technician, leads day-to-day work activities. After data is collected by the survey party, surveying technicians help to process the data by entering the data into computers.

Mapping technicians typically do the following:

• Select needed information from databases to create maps
• Edit and process images that have been collected in the field
• Produce maps showing boundaries, water locations, elevation, and other features of the terrain
• Update maps to ensure accuracy
• Assist photogrammetrists by laying out aerial photographs in sequence to identify areas not captured by aerial photography

Mapping technicians help cartographers and photogrammetrists produce and upgrade maps. They do this work on computers, combining data from different sources.

Geographic Information System (GIS) technicians use GIS technology to assemble, integrate, and display data about a particular location in a digital format. They also use GIS technology to compile information from a variety of sources. GIS technicians also maintain and update databases for GIS devices.