A field visit should test specific observations from the desk review. Prepare the locations, questions and source records before departure, and agree how new observations will be recorded.
Prepare the map pack
Include the project footprint, proposed visit points, access routes, settlements, water features and relevant constraints. Supply a legend, scale, coordinate reference, source dates and map edition. Check label size on the device or printed sheet that will be used.
Preload permitted data and basemaps where offline use is needed. Test the pack with the network disconnected. A working online map or an exported HTML file does not establish offline availability.
Define each verification task
Record a point ID, existing source feature, question, planned observation and responsible person. Examples include confirming a facility location, checking a crossing, or establishing whether an access route is usable. Keep approximate coordinates and unverified assumptions visible.
Capture and reconcile observations
Retain observation time, coordinates, stated positional accuracy, method and relevant photographs or notes. Respect consent and restrictions on sensitive locations. Preserve the original desk-review record; add field evidence and resolve discrepancies through an explicit update.
Deliver the map edition, visit log, unresolved questions and a list of resulting data changes. A single visit does not establish seasonal conditions or a complete inventory.