Vector Tile Roadmap

[pjcozzi]

Notes on vector data

• [x] Polygons, #24
  • [ ] How bad are cracks and what are we going to do about them?
  • [ ] Can additive refinement just add new vertices to polygons? Perhaps this is a completely different progressive tile format.
  • [ ] Per-feature minimumHeight and maximumHeight?
• [x] Polylines
• [ ] Polygons with holes
• [ ] Declarative styling
• [ ] Point features - billboards, labels, and points
  • [ ] Declutter?
• [ ] Non clamped-to-ground features
• [ ] Concise representation for ground-clamped positions, https://github.com/AnalyticalGraphicsInc/3d-tiles/pull/124#issuecomment-243156631

Selection of Cesium geometries:

• [ ] Polygon: extrusion and at height
• [ ] Polyline: extrusion (wall) and at height
• [ ] Rectangle: on terrain, extrusion, and at height
• [ ] Ellipse: on terrain, extrusion, and at height
• Others as requested

[pjcozzi]

Initial Cesium implementation for polygons: https://github.com/AnalyticalGraphicsInc/cesium/pull/4186

[pjcozzi]

Started spec in #124.

Pushing post 1.0 to narrow the scope, this would come soon after in a follow-up spec release since the spec and Cesium implementation are far along.

[pjcozzi]

• [ ] In declarative styling, should point.image be able to reference pixels glTF buffer/bufferView style?

[pjcozzi]

• [ ] Ability to change polyline width (and other polyline properties) via declarative styling

[pjcozzi]

• [ ] Polyline style

[pjcozzi]

• [ ] What classification volumes - and other higher order surfaces like ellipses - should be able to be just rendered like polygons - as opposed to used for classifying another tileset?

[ggetz]

Suggestion from the forum: https://groups.google.com/forum/#!topic/cesium-dev/3zTt9rZVX08

Ability to style what happens when geometries intersect or overlap (for instance, when two points overlap, ability to define the resulting overlap color)

[lilleyse]

• [ ] Make polyline heights optional. When heights are omitted the polyline should be clamped to the surface by the client.

[lilleyse]

• [ ] Support textured polygons.

[pjcozzi]

Related

• flatgeobuf - "A performant binary encoding for geographic data based on flatbuffers"

[jailln]

Hello, Do you have an idea on when the vector tile format will be available in 3D Tiles ? Thanks :)

[rory-ye-nv]

when will this be available? we are waiting for this important feature

[lilleyse]

See https://github.com/CesiumGS/3d-tiles/issues/391 for floating point precision considerations.