# NavSea PBF Schema v1

用途：定义 NavSea Vector Tile 的数据结构。

## 顶层字段

- identity
- chart_semantics
- labels
- light
- hazard
- area
- source_legacy

## identity

- fid
- canonical_object_type
- canonical_family
- detection_key
- render_layer

## chart_semantics

- chart_render_type
- chart_symbol_family
- chart_symbol_code
- chart_priority
- chart_visibility_min
- chart_visibility_max

## labels

- chart_label_text
- chart_label_subtext
- chart_label_anchor