ENC Bathymetry Plotter

The ENC Bathymetry Plotter is used to create contour lines and selected soundings for incorporation into ENCs or other digital hydrographic chart products. Point Cloud or gridded bathymetry data that serve as input is processed and transformed into a so-called Nautical Elevation Model. A Nautical Elevation Model is a shoal-biased, smoothed-out underwater terrain model.

The result of the process of creating a Nautical Elevation Model can be imagined as draping a sheet over a rough and bumpy surface to make it appear much smoother. The user can define the degree of generalization to suit the desired scale of the final chart product. Within the above analogy, increasing the generalization factor means strengthening the tension of the draped sheet.

The contouring process is applied to the Nautical Elevation Model (not to the source data). Users only have to set a few parameters (e.g. contour levels). The resulting contour lines have a smooth appearance and do not require any further generalization. Moreover, ENC Bathymetry Plotter supports the creation of selected soundings at a configurable density.

ENC Bathymetry Plotter closes a large gap in the chart production workflow. It assists the producer of nautical charts in contour generation and sounding selection and helps to reduce the manual workload drastically.

The resulting contours and selected soundings are easily copied into your S-57 data, using ENC Designer or other chart-production software capable of handling S-57 data.


  • Straightforward workflow from data import, via model creation, to export of results
  • Import of gridded bathymetry files (e.g. S-102, BAG) or xyz input data
  • Display of geo-referenced raster backdrops (e.g. GeoTiff)
  • Easy-to-use display controls, 3D display
  • Support of multiple colour palettes, gradation and gradient colour mode for optimal data presentation
  • Detailed statistics about input data and processing results
  • Shoal-biased smoothing and generalization process to create Nautical Elevation Model
  • Fast generation of contours from Nautical Elevation Model
  • Sounding selection function
  • Support of EPSG Coordinate Reference System definitions
  • S-57 export of contours and selected soundings; also export to ESRI Shape format
  • Generation of detailed processing report and statistics in PDF format
  • Command line mode for batch operations

*The image was created from data provided by courtesy of NOAA

Bathymetry Plotter Product Sheet

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SevenCs GmbH
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D-20359 Hamburg

Phone: +49 (0) 40 851 72 40
Fax.: +49 (0) 40 851 72 4 79
E-Mail: sales@sevencs.com