A division of HR Wallingford

Charted Points

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Charted Points

Information includes depth soundings, depth contours and coastline, and provides a foundation for numerical modelling studies. Similar to our HydroSpatial Base product, but in ASCII rather than vector form. This is for convenience of use in numerical modelling and gridding software.

Click here to download Charted Points coverage areas as KMZ file for GoogleEarth.

Charted Points product is available through our sales team. Sample data is also available free of charge for an area around Milford Haven, South Wales, United Kingdom.

Technical specifications

  • Spatial coverage


  • Scale

    Chart specific

  • Supply formats

    Point ASCII XYZ (.xyz)

  • Coordinate Reference System

    Geodetic WGS84 (urn:ogc:def:crs:EPSG::4326)
    Chart Datum (CD) – representing either Lowest Astronomical Tide (LAT); or Mean Sea Level (MSL)

  • Input/source data

    Charted depth soundings; contours; dredged areas: IHO Special Publication No. 57 (S-57)

  • Update frequency