The Gas Leak Survey (Walking Survey) app makes it easy for an underground leak surveyor to select, inspect and record a service leak survey using GPS location data right on their smartphone. The app imports all of a utility’s assets from their GIS system or asset management system of record. Using the app, a leak surveyor can cache and view all assets for a particular town or neighborhood, or select by service number in a map or list view with filters. They can then survey the service, while the app records their GPS “breadcrumbs” and saves them to the survey record.