ZFXY: a 3D spatio-temporal tiling scheme proposal for optimized data access

UN Open GIS Initiative Monthly VTC, 2022-03

Transcript

1. ZFXY: a 3D spatio-temporal tiling scheme proposal for optimized data access Hidenori (UN Vector Tile Toolkit / Geospatial Information Authority of Japan)
2. Introduction of background: 3D geospatial projects in Japan
3. GSI secured budget for point cloud data (regular budget [2 million USD] + external supplementary budget)
4. Shizuoka Prefecture is completing provision of point cloud data as Open Data
5. City Bureau of MLIT has been leading 3D city modeling throuh Project PLATEAU
6. Tokyo Metropolitan Government started Tokyo Digital Twin Project
7. 3D Spatial Information Infrastructure project led by Ministry of Economy, Trade, and Industry / IPA DADC
8. Civic, humanitarian, and educational project: DRONEBIRD led by Taichi - 3D point cloud from photogrammetry
9. Our UNVT colleague Takayuki appointed in 3D spatial information infrastructure design committee by IPA DADC.
10. UNVT Community is working on: How can we optimize access to 3D geospatial data?
11. Tile: industry standard in web maps {z}/{x}/{y} z: zoom index, x: west-east index, y: north-south index
12. ZFXY: 3D extension to the tile-scheme {z}/{f}/{x}/{y} z: zoom index, f: height index, x: west-east index, y: north-south index
13. f: height index, or floor-number index f = floor(n * h / H) where h = elevation [m], n = 2 ^ z, and H = 2 ^ 25 [m] Height of a voxel represented by a ZFXY with z=25 is 1 [m].
14. https://github.com/unvt/zfxy-spec
15. https://github.com/unvt/zfxy-ruby
16. Demo
17. https://unvt.github.io/zfxy-ruby/
18. 50cm GSD at z=26 https://x.optgeo.org/zfxy-ruby/#22.28/35.65779459/139.70209432/-85.5/60
19. https://geolonia.github.io/zfxy/#8.14/35.431/138.612/-45.6/60
20. https://github.com/geolonia/zfxy
21. Temporal extension
22. ZFXY: 3D extension to the tile-scheme {z}/{f}/{x}/{y}/{t} z: zoom index, f: height index, x: west-east index, y: north-south index, t: temporal index
23. t: temporal index, or pomodoro code Time.now.to_i / 1800
24. Motivation of UNVT Community to join We need data to prove the value of ZFXY. We are happy to build prototypes with your data.