Marine Cartography - Working Group

Marine Cartography

6103.3 - Rescheming plan for NOAA's Electronic Navigational Chart Coverage

Thursday, July 6
9:10 AM - 9:30 AM
Location: Virginia A

The scheme – or footprints – of NOAA ENCs are based on the footprints of the raster charts from which they were derived. As a result, changing current ENC coverage to incorporate additional survey data outside of the existing bounds is complex and poses a challenge. In addition, the scale ranges chosen for the ENC navigational usage bands differ from the International Hydrographic Organization’s (IHO) recommendations. As part of the “ENC first” effort, an ENC rescheming approach was developed to provide a seamless, tiled coverage that can easily be segmented or extended based on geographic location, available data and scale. In this new regular gridded ENC coverage approach, only a limited number of chart scales are used (down from the current 131 different scales). The new ENC scales conform to IHO S-57 and IHO S-101 ENC format specification. The new scheme segments the ENC tiles into three geographic zones. All individual ENC cell limits within each zone are along even lines of latitude and longitude. At higher latitudes, the regular longitudinal width of cells is increased twice to account for the convergence of meridians at the poles.

Shachak Pe'eri

NOAA - Office of Coast Survey



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Guillaume E. Auclert

NOAA/Marine Chart Division

Guillaume Auclert is a cartographer for the Marine Charting Division at NOAA. He has 8 years of experience in GIS and cartography. He is currently pursuing a Masters of Professional Studies in Geospatial Information Science at Maryland University and has attended Montgomery College and George Mason University for his Bachelors in Geography. He is currently working on a number of special projects including Satellite Derived Bathymetry, Composite Coastal Bathymetry and on ENC rescheaming projects.


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Allison Wittrock

NOAA - Office of Coast Survey

Allison works for NOAA's Office of Coast Survey and is currently the chief of the charting branch for the Northeast U.S. and Lakes Ontario and Erie. She has over 12 years of nautical charting experience.

Allison got her B.A. in Geography and a Program Certificate in Cartography and GIS from the University of Northern Iowa.


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John E. Nyberg

Chief, Marine Chart Division
NOAA - Office of Coast Survey

John Nyberg is the chief of NOAA's Marine Chart Division. He has helped direct Coast Survey’s chart modernization to digital products, changing the operational focus from paper-based chart compilation to electronic navigational charts. Prior to the Marine Chart Division, Nyberg was deputy chief of NOAA’s Navigation Services Division, after working as a technical advisor and United States Coast Pilot cartographer. During his 12 years with NSD, he helped manage the procurement of the research vessel Bay Hydrographer II, initiated the modernization of the United States Coast Pilot’s production system, and served as acting navigation manager for Long Island Sound.


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Colby Harmon

Cartographer / Project Manager
NOAA - Office of Coast Survey

Colby Harmon is a staff cartographer and project manager in the National Oceanic and Atmospheric Administration's Office of Coast Survey. Previously, he worked at the National Geospatial-Intelligence Agency and its predecessor organizations. He has been involved in developing and maintaining specifications for several digital nautical chart products and their symbolization throughout his career.
He received a Bachelor of Arts degree in Geography from the University of Connecticut and a Masters of Science in Strategic Intelligence from the U.S. Joint Military Intelligence College. Prior to obtaining his undergraduate degree, Mr. Harmon served in the U.S. Air Force as a geodetic surveyor.


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Ron Furness

Regional Representative Nautical Cartographer
IIC Technologies Inc.

Presently represents IIC Technologies in Australia and SW Pacific. His long career in nautical cartography commenced in 1960 at the UKHO. From 1965 he worked in the Australian Hydrographic Office from where he ‘retired’ in 2002. He has been a long-serving member of the FIG/IHO/ICA International Board on Standards of Competence for Hydrographic Surveyors and Nautical Cartographers. He has served as the Chair of the then ICA Commission on Marine Cartography. His interest in bringing nautical cartography to the fore within ICA has seen him take on the position of Chair of the present ICA Working Group on Marine Cartography.


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6103.3 - Rescheming plan for NOAA's Electronic Navigational Chart Coverage

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