# Commission Implementing Regulation (EU) 2018/1973 of 7 December 2018 amending Implementing Regulation (EU) No 909/2013 on the technical specifications for the electronic chart display and information system for inland navigation (Inland ECDIS) referred to in Directive 2005/44/EC of the European Parliament and of the Council, Division 2.2.1

Extent: E+W+S+N.I.

For each geometry type (point, line, area) there is a separate look-up table. Each entry in a look-up table consists of the following fields:
(a) 6-character code of the feature class (acronym);
(b) Attribute combination;
(c) Symbolisation instructions;
(d) Display priority, 0-9 (comparable with drawing layers);
(e) Radar code;
(f) Display category (Display base, standard, all other);
(g) ‘Viewing group’, more refined grouping of features than the display categories.
In this case the feature LNDMRK is shown by the symbol TOWERS01 with priority 7, if the attribute CATLMK equals 17. The feature lies over the radar.
The presentation of features in a specific area that are contained in different cells of the same usage follows the entries in the look-up tables.

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Source: https://www.legislation.gov.uk/eur/2018/1973/annex/division/ELECTRONIC/section/3/division/2/division/2.2/division/2.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2018-1973/annex/division-ELECTRONIC/section-3/division-2/division-2.2/division-2.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.