IHO S121 Attribution Tool

Post-processes a folder of Shapefiles and appends S121-specific attributes across the three S121 Profiles - Baseline, Maritime Limits and Maritimie Boundaries.

The S-121 maritime limits and boundaries product specification is designed to provide a suitable format for the exchange of digital vector data pertaining to maritime boundaries. The specification is customised to ensure the unique features and attributes of maritime boundary information can be exchanged between States. The specification is also intended to be suitable for lodging digital maritime boundary information with the United Nations for purposes related to UNCLOS. The specification addresses a need for a non-proprietary format that is both open standard and sufficiently flexible to meet the needs of States.


Getting Started

Extract downloaded zip file, and double click the run.bat file


Java 8 Runtime, download and install from