GPS/GIS utility mapping requires access to the project site and the areas where utility information needs to be collected. Before mapping begins, it is helpful to provide site plans, existing utility drawings, survey information, property boundaries, previous mapping data, and details about known utilities. This information gives technicians a better understanding of the project and helps define the required mapping scope.

The fieldwork typically uses GPS/GNSS equipment, GIS software, utility locating technology, and other specialized surveying or mapping tools. Technicians collect geographic coordinates and relevant information about detectable utility features, which may include utility lines, manholes, valves, meters, access points, structures, and connection locations. Depending on project requirements, additional locating methods such as electromagnetic locating or GPR scanning may also be used.

For accurate results, the site should be accessible and reasonably clear of obstacles, and the project team should identify the areas that require mapping. After field data is collected, it can be organized into digital GIS maps and utility records that support construction planning, infrastructure management, maintenance, and future development. Proper preparation helps ensure the mapping process is efficient, organized, and accurate.