Tokyo released point cloud data of the entire city for free

https://twitter.com/spatiallyjess/status/1871342549958537326

by taubek • 2 years ago

314 37 2 years ago

twitter.com

_____k• 2 years ago

Link: https://info.tokyo-digitaltwin.metro.tokyo.lg.jp/3dmodel/

Retr0id• 2 years ago

What do I need to click to get the pointcloud version? I'm just getting regular untextured polygons.

Timon3• 2 years ago

The table "Posted data on 3D Viewer" contains a row "Point cloud data" with several links, e.g. "Viewing the LP point cloud of the Tokyo Metropolitan Government area in the viewer": https://3dview.tokyo-digitaltwin.metro.tokyo.lg.jp/#share=s-...

numpad0• 2 years ago

Supposed to be [1][2] according to [0] but only by lots of clicking through GUI? It's really intuitive. GSI(Geospatial Information Authority of Japan) download site is a lot better, though they're more geography focused.

0: https://twitter.com/tocho_digital/status/1697474739583746474

1: https://catalog.data.metro.tokyo.lg.jp/dataset/t000029d00000...

2: https://catalog.data.metro.tokyo.lg.jp/dataset/t000029d00000...

3: https://fgd.gsi.go.jp/download/menu.php

bamboozled• 2 years ago

So fun to explore, it has to be the greatest city on earth, just a marvel in so many ways.

yieldcrv• 2 years ago

Feels like where Google Earth was 22 years ago

lxdlam• 2 years ago

I must say this is tremendous. There are many different AIGC explorations in 3D topics, with such high quality dataset, it will greatly assist current workflow and accelerate the 3D creative evolution.

JCharante• 2 years ago

Great for cgi and video games

cpa• 2 years ago

In france, the national geodata institute (IGN) has captured lidar data of the whole country (20 points per km2 if memory serves, in the OP it’s 30p per km2).

https://diffusion-lidarhd.ign.fr/visionneuse/?copc=https:%2F...

reustle• 2 years ago

https://www.swisstopo.admin.ch/en/switzerland-in-3d

Switzerland is one of the first countries to possess a detailed 3D buildings model covering the whole country. This digital model of Switzerland consists of approx. 70 million 3D objects. Besides every single building in Switzerland and the Principality of Liechtenstein, bridges, cable cars, forests, individual trees and geographical names are also represented in 3D. Two movement modes enable interactive navigation through space. Discover digital Switzerland from the air in flight mode or take a virtual stroll around a 3D model of your own village or neighbourhood.

cdaringe• 2 years ago

Crashed on my old iPhone 6SE, but could tell it was getting cool!

rnewme• 2 years ago

This might be a stupid question, but isn't Switzerland known for its countless hidden bunkers and defense positions? Doesn't mapping and publicly exposing basically the whole country only bring negatives and nothing positive?

notesinthefield• 2 years ago

One would reasonably assume threats could map surface-level objects from orbit. The Swiss (I hope) would consider this and react accordingly.

jajko• 2 years ago

I have one of such fortifications, called Toblerone line, running around our place in canton Vaud. The whole line is maybe 15km long from Geneva lake up the Jura mountains, made up from concrete spikes (even raisable in the middle of roads), blowable bridges and around 15 tiny concrete fortresses (fortinettes), all in plain sight, mostly visible on google maps/street view.

All built around 1930s. There is popular hiking trail along all this, since nature and forests around it are pretty and well maintained. No secret really. Same for many other old stuff. New stuff should be hidden on bases/remote places.

Btw checked our building and surrounding ones and its pretty precise but not up to date with 2024 finished construction.

SahAssar2• 2 years ago

I though Switzerland's defense was more based around being mountainous and having explosives planted in critical tunnels/bridges and having a large percentage of the population armed and trained for national self defense. Basically in a ground invasion would be deadly and slow with no mobility and resistance everywhere.

Besides that it's hard to imagine which foreign power would have incentive and power projection to even try it.

The way I've understood it is that none of their defense is hidden, it uses the natural and societal benefits. Most of that could be gleaned by anyone with access to satellite images and wikipedia.

That might all be outdated info though, it'd be interesting to see where I'm wrong though!

yencabulator• 2 years ago

Map says it's a building, not what's in the building or how sturdy the building is. The thing that looks like a barn might not be a barn.

ks2048• 2 years ago

I wonder if this dataset has been added to OpenStreetMap (or what the legal restrictions could be). If I look at Zurich on https://osmbuildings.org/ it seems like it has all the buildings in 3d.

yarri• 2 years ago

Background on the Tokyo government’s digital twin program, including sourcing and maintenance efforts

https://github.com/tokyo-digitaltwin/roadmap_v1.0/blob/main/...

Havoc• 2 years ago

How do they collect point cloud data at scale?

lbotos2• 2 years ago

speculating: Lidar from a plane?

https://www.reddit.com/r/Albany/comments/1hdxkz0/comment/m1z...

Imagine a route like this, except many lanes. I was trying to find a pic I saw the other day of one over NYC

lbotos2• 2 years ago

slightly better:

https://www.reddit.com/r/flightradar24/comments/u59zc2/off_t...

https://www.yellowscan.com/knowledge/drone-flight-planners-t...

anakaine• 2 years ago

I do this sort of stuff for work. Plane borne lidar is typically only part of the answer, and usually a hybrid acquisition model is required.

araes• 2 years ago

Here's a link to the people out of Huntsville, AL who do a lot of survey acquisition work in America, and did the collection effort noted in the Reddit post below. [1]

The About Us video shows some of the planes, equipment, collection flights, survey patterns, and data applications for the collection efforts. Other pages have notes on the planes and work done.

[1] Revolution Flight, Survey Subunit, https://www.surveyaircraft.com/about-us

nullhole• 2 years ago

Free reminder that the USGS is involved in an epic, nearly decade-long collection of mid- and high- density lidar of the entire continental USA, and the QC'd data (point cloud & derived) is published gratis for everyone to use:

https://www.usgs.gov/3d-elevation-program

https://www.usgs.gov/media/images/3d-elevation-program-fy25-...

https://www.usgs.gov/3d-elevation-program/3dep-spatial-metad...

Dig1t• 2 years ago

I would love to use point cloud data like this to make a map for a video game. What is the state of the art for turning point cloud data into 3D models?

Anyone know what the best of the best is?

fsloth• 2 years ago

What would the game be like? There are many ways to get as-built buildings at scale from existing datasets. For example there are cesium tiles. OSM data contains footprint polygons with height which means extrusion is trivial.

To explore know production algorithms for pointcloud-to-mesh check out the ones provided in cloudcompare and meshlab and see if any fit your purpose. Afaik there is no one objectively best recipe so you need to know what you want and be aware of the tradeoffs and constraints.

Note that for real time large scale cityscapes for complex buildings you likely need lods, impostors etc - which you don’t get for free. If you use just polygon extrusions you can likely bucket like a square kilometer of buildings to a drawcall (or more).

Stevvo• 2 years ago

Simplygon is used in MS Flight Simulator bcs it can generate seamless LODs. LOD 0 can simply be a Delaunay triangulation.

RandomBK• 2 years ago

A couple of cities have been doing this as well. Vancouver Canada has lidar point clouds covering the entire city, going back to 2013.

[0] https://opendata.vancouver.ca/explore/dataset/lidar-2022/inf...

[1] https://x.com/edwardjxli/status/1871676981143875725

ranger_danger• 2 years ago

confooseddd• 2 years ago

xcancel.com with proxy enabled in its setting for media seems to work

lilalomoslama• 2 years ago

some parts of germany are also available. some buildings are simple, some have a really good 3d model. for example here is the data for bavaria https://geodaten.bayern.de/opengeodata/OpenDataDetail.html?p...

Tokyo released point cloud data of the entire city for free

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