FGDC Geospatial Positioning Accuracy Standards Part 5 Standards

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys August 5, 2003 Coordination Group Vote on Recommendation for FGDC Endorsement

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Parts previously endorsed by FGDC: • Part 1: Reporting Methodology, FGDC-STD-007. 1 -1998 • Part 2: Standards for Geodetic Networks, FGDC-STD-007. 2 -1998 • Part 3: National Standard for Spatial Data Accuracy, FGDC-STD-007. 3 -1998 • Part 4: Standards for Architecture, Engineering, Construction and Facility Management, FGDC-STD-007. 4 -2002

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Provides minimum standards for horizontal and vertical accuracy of features such as: • water depths • objects on seafloor • navigational aids • shoreline for coastal waters of U. S. and its Territories

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Does NOT cover • hydrographic surveys for river and harbor navigation projects • surveys for project construction Which are covered by Part 4: Standards for Architecture, Engineering, Construction and Facilities Management and Facility Management

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Spatial Accuracy: 95% Confidence Level Horizontal Datum: NAD 83 Vertical Datum(s): • Mean Lower Low Water (MLLW) for Atlantic, Pacific, and Gulf Coast charts • International Great Lakes Datum (1985)

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Standards vary by survey classification: • Special Order - Minimum underkeel clearance; hazardous bottom conditions • Order 1 - Greater underkeel clearance than Special Order; soft silt/sand bottom • Order 2 - Depths less than 200 meters not covered by Special Order or Order 1 • Order 3 - Depths greater than 200 meters

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys • Based on International Hydrographic Organization (IHO)Standards for Hydrographic Surveys, Special Publication No. 44 (April 1998) • S-44 developed over 4 years by 60 nations • IHO is a Liaison with ISO Technical Committee 211, Geographic Information • U. S. represented by NIMA and Office of Coast Survey, NOS, NOAA • Web site: http: //www. iho. shom. fr/

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys • Standard developed by FGDC Bathymetric Subcommittee (now Marine and Coastal Spatial Data Subcommittee) • Standard released for 90 -day public review in November 2000 • Notice to broad-based geospatial data organizations such as ASPRS, ACSM, URISA, and NSGIC, as well as 70+ contacts on Subcommittee mailing list • No comments received during public review • SWG voted to recommend CG approval for FGDC endorsement at its April 10, 2002 meeting

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Concerns raised by SWG on May 6, 2002 1. Document specific differences from IHO S 44 2. Full compliance with FGDC‑STD‑ 001‑ 1998 3. Response completed – June 4, 2003

FGDC Geospatial Positioning Accuracy Standards, Part 5: Standards for Nautical Charting Hydrographic Surveys Request for FGDC Coordination Group approval for FGDC endorsement Thank you!