A marine geophysical concept defining measurements and products used to characterize seafloor shape and subsurface structure. It governs acquisition, processing, and interpretation steps that convert instrument signals into interpretable maps and profiles. It does not establish material properties without calibration, integration with samples, and validation against independent observations. It materially affects understanding of tectonics, hazards, and sediment pathways by revealing geometry and stratigraphic patterns. The concept is generally stable, though instruments, processing methods, and resolution capabilities improve over time.

Principle

Accurate georeferencing, explicit depiction of uncertainty and provenance, consistent attribute schemas and symbology, and scale-dependent generalization so that maps communicate both data and their limits to intended audiences.

Demonstration

A map product may include a point layer of ROV-confirmed seep observations with timestamps, polygon outlines of authigenic carbonate accumulations, gridded maps of backscatter anomaly intensity, vector traces of acoustic flares and an uncertainty raster showing probability of seep presence; all accompanied by a README metadata file and layer symbology rules.

Misapplication

Presenting smoothed or buffered polygons as precise boundaries without expressing uncertainty, overlaying datasets of different provenance and scale without harmonizing projections or attributes, or omitting processing provenance and metadata.

Consequence

Delivers actionable spatial information used for sampling planning, monitoring site selection, environmental assessments and publication; when properly documented, map products enable synthesis across studies.

Reversal

A simple list of coordinates or an undocumented figure provides limited spatial context and cannot support robust spatial analysis or reproducible decision-making.

Boundary

A map product is a derived representation intended for interpretation and decision support; it is not a substitute for raw survey files or the full processing workflow, and predictive model outputs should be clearly labeled as modelled rather than observed.

Semantic Tension

Tension between cartographic clarity (clean symbology, simplified boundaries) and scientific fidelity (displaying raw points, heterogenous uncertainty): clarity aids communication but may hide complexity important for scientific use.

Synthesis

A Cold Seep Map Product synthesizes processed geophysical, geochemical and visual data plus interpretation and metadata into georeferenced map layers or figures that represent seep occurrences, extents and confidence, designed for the intended scale and use while explicitly stating limitations.