VORF, Bringing Land and Sea Together

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Presentation transcript:

VORF, Bringing Land and Sea Together Datums are an essential component of any SDI/MSDI. Vertical Offshore Reference Frame, 2005 Joint Project with University College London (UCL) Delivers seamless gridded vertical separation data to allow land and sea data to be joined and integrated. Horizontal Data to WGS84 is complete VORF methodology: Satellite altimetry in open ocean OSGM05 geoid model (UK) Tide Gauge data for UK Copyright © 2017 Open Geospatial Consortium

Methodology Satellite altimetry Tide gauge data Tidal modelling GNSS observations Plus gravimetric geoid, OSGM02 datum correction model, UKHO meta-data, coastline polygons, river polygons, etc.

Integration of datums – UK & Ireland Heights with respect to ETRF89 datum across UK and Irish waters Heights of all land datums in the British Isles, within the coastal zone – 17 of them. Heights of Chart Datum, LAT, MLWS, MSL, MHWS, HAT (All used in marine charting). Unifies heights, elevations and depths.

Copyright © 2016 Open Geospatial Consortium The Way Forward Many Coastal states have developed their own VORF-like solutions Harmonisation between member states Updating – new geoid, better tidal measurements, better altimetry. Distribution and use methodologies. Copyright © 2016 Open Geospatial Consortium