Vector Data

Notes

Use cases: Traditional geospatial features: points, polylines, and polygons. Replacing KML.

Format

Combination of binary (for positions, normals, etc.) and JSON (for labels, other metadata, etc.).
Concise representations for Cesium's set of geometries, including extrusions, and billboards and labels.
- Need to carefully select the representation for the best trade-off between conciseness and runtime processing. For example, polygons will likely be pre-triangulated since it only adds indices to the payload, but will be subdivided at runtime since subdivision is fast and increases the vertex payload significantly.
- RTC positions for high precision-rendering.
- Context-aware compression.
- Bounding volume may need to be adjusted at runtime for terrain clamping.
Metadata for cracking, morphing, and perhaps label declutter.

Could also name this a Geometry tile.