A topocompositional image of an inanimate object or surface can be generated that comprises data that relates to a topographical image, data that relates to a chemical compositional image, and combining such topographical and chemical compositional data to form a composite image. According to the invention, the vehicle comprises a bridgelike frame structure which forms a tunnel all along the vehicle, for the passage of coils while they lay on the ground, having height and width dimensions slightly greater than the corresponding dimensions of the coils, means for griping the coils and means for lifting the coils. A conduit is formed in a fitting portion of the base for directing a stream of gas or liquid that is capable of diffusing through the diffuser element into a chamber formed between an inner surface of the diffuser element and a floor portion of the base. The method and apparatus have particular utility in determining the presence of corrosion inhibitors that have been added to petroleum pipelines upstream of the sampling point. The method combines regular channel maintenance with dynamic frequency hopping over a cluster of vacated channels that are initially setup such that the switching delays for channel setup and channel availability check are eliminated. A system includes a forms processing subsystem including a form designer and a form processing and workflow module, and a client subsystem including a form submission manager and a client data store.