| Expect excellent hydrographic sessions at FIG Congress 
							2026 - and much more 
							FIG Congress 2026 in South Africa is a unique opportunity for surveyors within 
							hydrography to participate in specialized sessions 
							dedicated to this field. FIG Commission 4, chaired 
							by Eranda Gunathilaka, is planning several excellent 
							sessions:
							Read more.All sessions are part of the larger FIG Congress 
							2026 where you can network and get inspired. Read 
							here about
							
							what you can expect.  FIG 
							encourages you to
							
							submit abstracts before 1 November 2025 and
							
							register for the international conference.  | Mapping the plastic using UAVThe working group 4.3 on Mapping the Plastic has 
							published the article "Mapping the Plastic Using UAV 
							-
			Helping communities address the global plastic waste crisis" in GIM Magazine, January 2025. The article is written by Simon Ironside, Gordana 
			Jakovljevic and Naa Dedei Tagoe.
							
			Read the article | 
							Commission 4 at FIG Working Week 2025The FIG Working Week 2025 was held from 6-10 
							April in Brisbane, Australia. During the conference, 
							Commission 4 had organised severaly sessions in the tehcnical 
							programme and conducted its annual meeting. 
							Additionally, the progress of all commissions was 
							presented at the General Assembly.  > 							
							
							Commission 4 
							annual report to General Assembly>
							Minutes 
							- General Assembly
 >
							
							Report - General Assembly
 > 
							Proceedings/Technical programme
 > Conference 
							Website
 | 
					
						| 
								
									| Meet the officersCommission Chair
									 Dr. Malavige 
									Don Eranda Kanchana Gunathilaka, Sri 
									LankaContact: FIGCommission4@fig.net
 |  
									| Working Group Chairs: Chair of Working Group 4.1 - 
									
									Hydrographic Standards and GuidelinesMr. Geoff Lawes (Australia), geoff.lawes@revelare.com.au
 Co-chair: Ms. Tanja Dufek (Germany), tanja.dufek@hcu-hamburg.de
 
 Chair of Working Group 4.2 -
									
									Sustainable Oceans and Hydrography
 Mr. Gordon Johnston (UK), gordontjohnston1@gmail.com
 Co-chair: TBC
 
 Chair of Working Group 4.3 -
									
									Mapping the Plastic
 Mr. Simon Ironside (New Zeeland), SIronside@linz.govt.nz
 Co-chair: Dr. Gordana Jakovljevic (Bosnia and Herzegovina), 
			gordana.jakovljevic@aggf.unibl.org
 
 Chair of Working Group 4.4 - 
							
							Hydrospatial Domain and Marine Administration
 Dr. Kelvin Tang Kang Wee (Malaysia), tkwkelvin2@live.utm.my
 Co-chair: Mr. Denis Hains (Canada), dhains@h2i.ca
 
 Chair of Working Group 4.5 –
									
									Climate Change induced Sea Level Rise and 
									Adaptation
 Dr. Mick Filmer (Australia), M.Filmer@curtin.edu.au
 Co-chair: Dr. Ashraf Dewan (Australia), A.Dewan@curtin.edu.au
 
 Commission Chair
 Dr. MDEK Gunathilaka (Sri Lanka), erandakan@geo.sab.ac.lk
 
 Vice Chair of Administration
 Mr. Gordon Johnston (UK), gordontjohnston1@gmail.com
 | Delegates and Correspondents:Each member association has the right to 
									nominate a delegate to each of the ten technical 
									commissions. In addition Affiliates, Academic 
									Members and Corporate Members are welcome to nominate a 
									correspondent to each commission.  Commission 
										Delegates and correspondents Interested? If you are 
									interested to become a national delegate from your 
									country, please contact your
									
									member association. The contact information of national delegates is 
									updates by the FIG office. Any changes in contact 
									information should be sent to the FIG 
									Office.  
									 |  
									| 
 |  
									| Achievements |  
									|  | The hydrographic surveying community is 
									using high-accuracy GNSS positioning 
									techniques for vertical positioning of 
									survey platforms, the sea surface and the 
									sea floor. In order to meet required 
									vertical positioning standards, it is of 
									paramount importance that the entire ERS 
									process be thoroughly understood and that 
									the appropriate procedures are in place 
									during data acquisition, validation, 
									cleaning and processing phases. 
									
									Read the publication |  | In 2019 a Working Group on Mapping the 
									Plastic was established. The Working Group 
									is focusing on the dumping of plastics (and 
									other waste) into major rivers, river 
									systems and deltas at strategic locations 
									around the world.
									Follow 
									the work of the Working Group Article in GIM Magazine January 2025
 |  
									|  |  
									|  | Much like towns and cities which have grown 
									because of their close proximity to 
									railroads, superhighways and airports, 
									access to navigable waters has provided the 
									earliest cornerstone for discovery and 
									economic development the world over. But 
									what makes waters navigable? 									
									Read the publication |  | Since 1994, when FIG Publication No. 8, a 
									report entitled Hydrography, Ports and 
									Harbours, was first published, the 
									widespread adoption of the Global Navigation 
									Satellite System (GNSS) and Electronic 
									Nautical Charts (ENC) have brought on 
									notable changes to hydrographic survey 
									technology and how nautical data is 
									published. 									
									Read the publication |  
									|  |  
							| Working GroupsTerm 2023-2026: Work 
							plan
 WG4.1
							
							Hydrographic Standards and GuidelinesWG4.2
							
							Sustainable Oceans and Hydrography
 WG4.3
							
							Mapping the Plastic
 WG4.4
							
							Hydrospatial Domain and Marine Administration
 WG4.5
							
							Climate Change induced Sea Level Rise and Adaptation
 
 Previous terms Term 2019-2022Term 2015-2018
 Term 2011-2014
 Term 2007-2010
 Term 2003-2006
 | FIG PublicationsFIG Pub. 62:
							Ellipsoidally Referenced Surveying for Hydrography FIG Pub. no. 57:
							
							Report on the Economic Benefits of Hydrography FIG Pub. no. 56:
							
							Guidelines for the Planning, Execution and 
							Management of Hydrographic Surveys in Ports and 
							Harbours FIG Pub. no. 37:
							
							FIG Guide on the Development of a Vertical Reference 
							Surface for Hydrography.  FIG Pub. no. 8:
							
							Hydrography in Ports and Harbours  | FIG Proceedings
							
							List of FIG Conference ProceedingsFIG 
							Surveyors Reference Library
 | EventsAll Commission 4 events Reports to General Assembly
							All Commission 4 reports |  |