IN ACTION

Sean Lilley

Analytical Graphics, Inc

slilley@agi.com

@lilleyse

• Open source JavaScript library for 3D globes & maps

• Built on WebGL

• Founded by Analytical Graphics Inc.

• City building data

• Photogrammetry

• LiDAR

• Vector data

• CAD & BIM

3D Data

• City building data – CityGML, GeoJSON, Shapefile, KML + COLLADA

• Photogrammetry – COLLADA, OBJ, hundreds of jpegs

• LiDAR – LAS, PCD, CSV with xyz/rgb

• Vector data – GeoJSON, Shapefile, KML

• CAD & BIM – IFC, DWG, other proprietary formats

3D Data

• Many input formats

• Common for datasets to be in the multi GB range

• Inconsistent projections

• Not inherently streamable

• Amount of data is only growing

3D Data

3D Data Case Studies

Melbourne• One hundred 8k by 8k images

• 100 million triangles

• 136 obj models

Cell Tower• 900 images

• 5.6 million triangles

Tiling in 3D is a necessity

Vulci Site• 9634 images

NYC• 1.1 million buildings

• 12 GB CityGML

swisstopo• 40 million buildings

• 80 million trees

• 150,000 labels

• KML + COLLADA

Desert Point Cloud• 1.5 GB LAS file

• 55 million points

Philly Trees• 57K trees

• Instanced from single COLLADA model

• CSV file with lat/long

• Too many input formats for renderers to realistically support

• Not optimized for streaming or rendering

• What we need:• A spatial data structure with level-of-detail

• Geometry and texture simplification for non-leaf tiles

• Quick to offload to GPU

3D Data

Massive heterogeneous

3D geospatial datasets

3D engines, e.g.,

3D Tiles• tileset.json

• Defines spatial layout for the tileset

• Relative paths to tiles

• May point to external tilesets

• Tiles• Contains the actual data

• Binary formats

• Alternatively – self contained .3dtiles SQLite DB

• Batched (b3dm)

• Instanced (i3dm)

• Point Cloud (pnts)

• Vector (vctr)

Tile Formats

• Batched (b3dm)

• Instanced (i3dm)

• Point Cloud (pnts)

• Vector (vctr)

Tile Formats

• Batched (b3dm)

• Instanced (i3dm)

• Point Cloud (pnts)

• Vector (vctr)

Tile Formats

• Batched (b3dm)

• Instanced (i3dm)

• Point Cloud (pnts)

• Vector (vctr)

Tile Formats

• Batched (b3dm)

• Instanced (i3dm)

• Point Cloud (pnts)

• Vector (vctr)

Tile Formats

• City building data – CityGML, GeoJSON, Shapefile, KML + COLLADA

• Photogrammetry – COLLADA, OBJ, hundreds of jpegs

• LiDAR – LAS, PCD, CSV with xyz/rgb

• Vector data – GeoJSON, Shapefile, KML

• CAD & BIM – IFC, DWG, other proprietary formats

3D Data

• City building data – b3dm

• Photogrammetry – b3dm

• LiDAR – pnts

• Vector data – vctr

• CAD & BIM – b3dm

3D Tiles

• City building data – b3dm

• Photogrammetry – b3dm

• LiDAR – pnts

• Vector data – vctr

• CAD & BIM – b3dm

• Instanced features – i3dm

3D Tiles

• Different tile formats may exist in the same tileset• Buildings + trees + point clouds

• Unified styling API• Metadata layout is the same for each format

• In the end, everything is a feature

3D Tiles

Vector Tiles + Buildings

Vector Tiles + Photogrammetry

Debug View

Style by height

Style by latitude

Style by distance to landmark

Hide small buildings

Point Cloud Styling

Since last year…• Revamped styling API

• Batched, Instanced, and Point Cloud format in solid shape for 1.0

• Progress on vector format and classification

• Cesium implementation merged into master

• 3D Tiles in the OGC Community Standard Process

3D Tiles Ecosystem

ContextCapture MicroStationconsidering

three.js

prototype

OSG.JS

@mattshax

FME

Exporters / Tilers Visualization engines

Built on

Validator in-progress

Next

A truly 3D vector tile for heterogeneous classification

A 3D analytics-enabled styling language

Time-dynamic streaming

• City building data

• Photogrammetry

• LiDAR

• Vector data

• CAD & BIM

3D Data

Thank you!

• https://github.com/AnalyticalGraphicsInc/3d-tiles

• Sean Lilley

• Analytical Graphics, Inc

• slilley@agi.com

• @lilleyse