aa1b93c7a87d2737d52c997ee7cf2ce7d638ad9b
map.js — _encRangeDaymarkCanvas: Remove tripod legs, hub ring and mast. Symbol is now two clean concentric triangles pointing up: outer WHITE + inner BLACK, matching the standard IALA dayboard. Optional light flare at apex if the feature has LITCHR. No extra structures. chart_manager.py — _build_cache: Don't overwrite existing land/hazard/zone GeoJSON files with an empty result when the .000 has no LNDARE/OBSTRN/ZONBND layer. Preserves hand-built or legacy cache data for custom charts (e.g. Barranquilla built from nav-aids-only CSV). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Description
Maritime Aids-to-Navigation monitoring with AIS and S-57 ENC charts
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