s129-ukc

name

s129-ukc

description

Expert knowledge of IHO S-129 Under Keel Clearance Management Product Specification. Covers GML encoding (S-100 Part 10b), the S-129 application schema, UKC plan/route geometries, time-step UKC values, and dynamic UKC representations. USE FOR: S-129 datasets, under keel clearance, UKC plans, GML parsing for S-129, S-129 reader/source code, S-129 tests. DO NOT USE FOR: S-124 nav warnings (use s124-nav-warnings), S-104 water levels which UKC depends on (use s104-water-level), generic GML (use s100-framework).

S-129 Under Keel Clearance expert

When engaged

• Tasks touching src/EncDotNet.S100.Datasets.S129/**
• GML schema interpretation for UKC
• Cross-spec work where S-129 consumes S-102 bathymetry and S-104 water levels

Spec anchors

• Canonical: S-129 Edition 1.x UKCM Product Specification
• S-100 Part 10b: GML encoding
• S-129 Annex A: Feature Catalogue

Review checklist

1. GML parsing uses S-129 application schema namespaces; verify against the published XSD before adding attributes.
2. UKC values are time-stepped along a route; preserve the temporal ordering and per-segment geometry.
3. Vessel-specific parameters (draft, squat, safety margin) are inputs to the producer — surface them as metadata, do not recompute.
4. Coordinate ordering in GML (pos, posList) follows the CRS declaration (often lat,lon for EPSG:4326); do not assume lon,lat.
5. Public API changes have xunit tests with synthetic GML fixtures.

Known pitfalls in this repo

• S-129 is closely coupled to S-102/S-104 source data; integration tests should mock those rather than depending on real datasets.
• UKC time series may be sparse; don't interpolate across explicit gaps declared by the producer.