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S-57 Edition 3.1 Encoding Bulletins |
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Bulletins de codage de l’édition 3.1 de la S-57 |
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S-57 Edition 3.1 Encoding Bulletins: S-57 is
the IHO standard for the exchange of digital hydrographic data. It has
been used almost exclusively for encoding Electronic Navigational Charts
(ENCs). However there is a need for S-57 to support additional
requirements, which has prompted the IHO to develop the S-100 (IHO Universal
Hydrographic Data Model) which will eventually supersede S-57. It is
anticipated however that S-57 Edition 3.1 will continue to be used to produce
ENCs for the foreseeable future. In
2010, the IHO approved the “unfreezing” of S-57 Appendix B.1, Annex A – Use
of the Object Catalogue for ENC (UOC). This was done in order to
transfer new and revised ENC encoding guidance incorporated in these Encoding
Bulletins, and in other IHO publications, into the authoritative IHO ENC encoding guidance document. Encoding Bulletins that have been transferred into the UOC
will maintain their reference in the Encoding Bulletins list, and the guidance
included in each Bulletin will be replaced with the appropriate UOC clause
references. Future new or revised ENC encoding guidance will be added
as new Encoding Bulletins, which will subsequently be incorporated in future
New Editions of the UOC as required.
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Bulletins de codage de l’édition 3.1 de la S-57 : la S-57 est la norme de l’OHI pour l’échange des données hydrographiques numériques. Elle est utilisée pratiquement exclusivement pour le codage des cartes électroniques de navigation (ENC). La S-57 doit néanmoins répondre à des besoins supplémentaires, ce qui a conduit l’OHI à développer la S-100 (Modèle universel de données hydrographiques de l’OHI) qui remplacera en fin de compte la S-57. Il est toutefois escompté que l’édition 3.1 de la S-57 continuera d’être utilisée pour produire les ENC dans les années à venir. En 2000, étant donné que l’édition 3.1 de la S-57 était largement utilisée dans les systèmes de production et de navigation, l’OHI a « gelé » le contenu de l’édition 3.1 et aucun autre changement n’a pu y être apporté. A mesure qu’un nombre croissant d’organismes hydrographiques ont commencé à coder les données des ENC, on a constaté que les diverses façons dont les différents producteurs codent les données peuvent aboutir à certaines incohérences. Par ailleurs, des problèmes imprévus affectant la manière dont les ENC sont affichées ou utilisées par les ECDIS peuvent survenir et devoir être résolus en modifiant la façon de coder les données des ENC. En raison du gel de l’édition 3.1, il n’a pas été possible d’apporter de changements à la norme actuelle pour résoudre ces problèmes. Afin de diffuser les modifications des directives de codage approuvées par l’OHI, des « bulletins de codage » sont élaborés pour décrire comment les producteurs de données peuvent modifier leurs pratiques de codage afin de résoudre les problèmes qui affectent l’utilisation des données des ENC dans les ECDIS. Chaque bulletin explique un problème spécifique lié aux ENC et aux ECDIS ; les procédures recommandées pour régler le problème et les conséquences de ne pas suivre les procédures recommandées. Il convient de noter que les procédures décrites dans ces bulletins ne sont pas obligatoires ; il est néanmoins vivement recommandé aux producteurs de données de les suivre, chaque fois que possible, afin d’assurer la cohérence de la production des ENC à l’échelle mondiale. En 2010, l’OHI a approuvé le « dégel » de l’Annexe A – Utilisation du catalogue des objets pour les ENC (UOC) de l’Appendice B.1 à la S-57. Ceci a été fait dans le but de transférer les directives de codage des ENC nouvelles et révisées, incorporées dans ces bulletins de codage et dans d’autres publications de l’OHI, vers un document officiel contenant les directives de codage des ENC de l’OHI. Les bulletins de codage qui ont été transférés dans l’UOC conserveront leur référence dans la liste des bulletins de codage et les directives incluses dans chaque bulletin seront remplacées par un renvoi aux clauses appropriées de l’UOC. Les directives de codage des ENC nouvelles ou révisées seront ajoutées en tant que nouveaux bulletins de codage, lesquels seront ensuite incorporés dans les futures nouvelles éditions de l’UOC, selon qu’il convient. Ces bulletins résultent de propositions portées à l’attention du groupe de travail sur la maintenance et le développement d’applications de la norme de transfert (TSMAD ). Les nouveaux bulletins doivent être approuvés par le TSMAD conformément à son mandat . |
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1. UOC clause 10.1.1 Navigational lines and recommended tracks; 10.2.2 Deep Water Route Centrelines; and 10.2.4 Recommended Routes [Updated – Feb 2012] 1.a UOC
Clause 10.1.1 Navigational lines (NAVLNE) and recommended tracks (RECTRC)
SUPERSEDED 35. UOC Clause 6.2.2 Obstructions, foul areas and foul ground [October 2011] 36. UOC Clause 11.7.4 Offshore production areas [October 2011] 37. UOC Clause 1.1.1 References within S-57 to other IHO publications [October 2011] 38. UOC Clause 5.5 Dredged areas [October 2011] 39. UOC Clause 6.6 Caution areas [October 2011] 40. UOC Clauses 10.2.2.1 Deep water route parts; 10.2.3 Traffic separation scheme systems; and 10.2.6 Two-way routes [October 2011] 41. UOC Clause 15 Collection objects [October 2011] 42. UOC Clause 9.2.1 Anchorage Areas [May 2012] 43. UOC Clauses 6.1.2 Rocks which may cover; 6.2.1 Wrecks; and 6.2.2 Obstructions, foul areas and foul ground [May 2012] 44. UOC Clause 3.1.1 Magnetic variation [May 2012] 45. UOC Clause 5.8 Areas with inadequate depth information [May 2012] 46. UOC Section 2 Cartographic framework [May 2012] 47. UOC Clause 4.7.11 Vegetation [May 2012] 48. UOC Clause 2.8.1 Wide blank area [May 2012] 49. UOC Clause 2.3 Textual information [August 2012] 50. UOC clause 4.8.20 Views and sketches, viewpoints [August 2012] 51. UOC section 4 Topography [August 2012] 52. UOC clause 2.7 Multiple objects [August 2012] 53. UOC Clause 12.8.1 Description of lights [October 2012]
Maintenance Document |
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Use of the Object Catalogue - Appendix B.1, Annex A - Encoding Bulletins (EB) |
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EB1a - UOC Clause 10.1.1 Navigational lines (NAVLNE) and recommended tracks (RECTRC) |
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Please note that item EB1a, EB1b and EB1c have been SUPERSEDED by EB1 above The third bullet point of clause 10.1.1 of Edition 2.1 (April
2002) of the Use of the Object Catalogue (S-57 Appendix B1, Annex A) states:
"When the traffic flow is one way, the direction of digitising of an
object of type line should be the same as the direction of the traffic
flow". |
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Please note that this item has been SUPERSEDED as the result of changes made to the Conditional Symbology Procedure for displaying this object class in ECDIS. |
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Please note that this item has been SUPERSEDED as the result of changes made to the Conditional Symbology Procedure for displaying this object class in ECDIS. |
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Revised encoding guidance regarding a dam that has its seaward edge coincident with the coastline was included in UOC Edition 3.0.0 (October 2011) – Clause 4.8.5. |
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New encoding guidance regarding fishing facilities located in deep water was included in UOC Edition 3.0.0 (October 2011) – Clause 11.9,1. |
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Revised encoding guidance regarding the population of the attribute QUASOU on WRECKS objects was included in UOC Edition 3.0.0 (October 2011) – Clause 6.2.1. |
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Revised encoding guidance regarding the population of the attribute QUASOU on OBSTRN objects was included in UOC Edition 3.0.0 (October 2011) – Clause 6.2.2. |
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New encoding guidance regarding lines demarcating collision regulation areas was included in UOC Edition 3.0.0 (October 2011) – Clause 11.13.5. |
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EB54 - UOC Clause 12.14.1 AIS equipped
aids to navigation | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This combined Encoding Bulletin (EB) and Presentation
Bulletin (PB) provides guidance on the correct encoding and portrayal of
Virtual AIS Aids to Navigation. Clause 12.14.1 of the Use of the Object Catalogue for ENC (S-57 Appendix B1, Annex A) provides guidance for the encoding of Automatic Identification System (AIS) broadcast messages used as aids to navigation, including a statement that it is currently not possible to encode Virtual AIS Aids to Navigation in ENC. Given that AIS technology is increasingly being used for Aids to Navigation purposes, the IHO Hydrographic Services and Standards Committee (HSSC) considers that there is now a requirement to implement an interim solution to enable the encoding of Virtual AIS Aids to Navigation in ENC. Accordingly, the HSSC has approved the use of the NEWOBJ object class, introduced through S-57 Edition 3.1, Supplement No.1, to enable the encoding of Virtual AIS Aids to Navigation in ENC. Encoders are advised, therefore, that in order to encode Virtual AIS Aids to Navigation information in ENC, the following encoding specification must be applied: If it is required to encode a Virtual AIS Aid to Navigation, it must be done using the object class NEWOBJ; Geo object: New object (NEWOBJ) (P) Attributes: CLSNAM CLFDEF DATEND DATSTA INFORM NINFOM NOBJNM OBJNAM TXTDSC NTXTDS SORIND SORDAT SYMINS The following table shows the combinations for the mandatory attributes CLSDEF, CLSNAM and SYMINS that must be populated, according to the purpose of the Virtual AIS Aid to Navigation and the corresponding portrayal for each encoding:
Virtual AIS Aids to Navigation should only be encoded where it is known that the Virtual Aid is intended to be permanent, or deployed for a specified fixed period. Where it is known that a Virtual AIS Aid to Navigation is moved or withdrawn on a regular basis and/or at short notice, such that implementing these changes through the application of ENC Updates is impractical, the Virtual Aid should not be encoded. A new validation check for this New Object will be included in the next version of S-58. Until validation tools have implemented the new version, encoders must consider appropriate validation measures when using the New Object as the correct encoding of the SYMINS attribute is critical to ensuring a correct display in ECDIS.
Portrayal Guidance for the NEWOBJ object class is provided in S-52 Edition 6, Section 8.3.3.11. The portrayal of virtual AIS Aids to Navigation in ECDIS is accomplished by encoded symbolization through the population of the SYMINS attribute as specified in the table above. The correct ECDIS display for each of the 12 NEWOBJ encodings is the symbol shown in the far right column. Each is a superimposition of the magenta circle from the berth number symbol (BRTHNO01) by a simplified symbol for a fixed aid as indicated. The symbols must be drawn in the listed order. That is, the magenta circle must be drawn first and the mark drawn over it. The magenta text, “V-AIS” must also be displayed. Note that OBJNAM, if encoded, will not be displayed and must be obtained through a pick report. |
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1. MD8 revision to Correction 1.Co.10 Correction 1.Co.10 was added to MD1 in November 1997.
The correction added two extra items to table A.7. It also appears to have
somehow changed the truncated escape sequence for lexical level 2 in the
last line from “”%/A” to “%/@”. This
correction should be corrected – i.e. the last
line should read Lexical level 2 - “%/A” |
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1. MD8 revision to Correction 1.Co.10 Correction
1.Co.10 was added to MD1 in November 1997. The correction added two extra
items to table A.7. It also appears to have somehow changed the truncated
escape sequence for lexical level 2 in the last line from “”%/A” to “%/@”.
This correction should be corrected – i.e. the last line should read Lexical
level 2 - “%/A” |
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Updated: May 2013 |