Chart Sheet Properties

This repository holds meta-information required to generate charts (e.g. adopted from the IHO's INT Charts) from the various OpenSeaMap data sources.

Upon the first discussion, this would be something like:

• INT number
• INT name
• min + max / lat + lon
• published scale
• National number (prefixed by country code?)
• National name

More details on the related wiki page: Catalogue of INT Charts

IHO Publication S-11 and structure

Many (all?) of the above details can be found as PDF documents provided by the IHO as PUB S-11 in Part B. The structure of this repository therefore reflects the one currently given by the IHO.

Structure of IHO_PUB_S-11

This is the top-level directory containing all the chart information. Its contents are described in the file 0_INDEX.csv that corresponds to the table on the IHO website. It therefore contains exactly three columns:

• File - the region name (e.g. Region F).
  • Each entry reflects the name of a sub-directory that is located within the top-level directory. Those will be referred to as the "Region directories" below.
• Area - the region's description (e.g. Mediterranean & Black Seas).
• Comment - the last update (e.g. Edition 2.0.4 - December 2012).

Structure of Region directories

Each directory is required to have a 0_INDEX.csv file of its own. They have exactly two columns:

• The index number:
  • An internal number assigned by the OpenSeaMap project that corresponds to the sequence of sections listed in the different Region PDF files.
  • The number corresponds to a file of the same name (appended by the suffix .csv), further down referred to as the "Section" files.
• The section name:
  • The (english!) name of the section as given in the PDF. Examples:
    • FROM COASTS OF THE CHANNEL AND OF THE NORTH SEA TO ICELAND
    • WESTERN ENGLISH CHANNEL
  • This is purely descriptive (a "human readable name") and not reflected in any file or directory name.

Structure of Section files

The Section CSV files directly correspond to the tables in the various Region PDF files. They contain 11 columns with the content as follows:

• INT No.
• Prod.
• National No.
• Title
• Southern limit
• Northern limit
• Western limit
• Eastern limit
• Date
• Scale
• Lat