Before the start of the actual field survey operations, preliminary site inspections are usually carried out in the areas concerned, often together with personnel and technicians from the client. These inspections aim to identify possible operational difficulties during the survey, such as asphalt-covered manholes, provincial or state roads, private areas that are not immediately accessible, inaccessible facilities and structures, or areas not covered by existing cartography or recently developed and not yet updated. These preliminary activities also allow the identification of homogeneous survey zones and the definition of the survey sequence. For each municipality, an optimal survey route is subsequently planned in order to optimize the movements of the survey teams, based on the information collected during the preliminary phase. This approach reduces travel time within the surveyed areas and allows similar activities to be grouped efficiently. In general, the survey begins from a starting section of the network and follows its development across the entire area to be surveyed, progressively covering the branches encountered along the route to ensure that no connecting lines are omitted. During this phase, the entire survey team is deployed, under the supervision of the Survey Coordinator. At the same time as the geometric survey, a topographic survey is carried out by the same team using GPS stations or total stations.