[HN Gopher] Tokyo released point cloud data of the entire city f...
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Tokyo released point cloud data of the entire city for free
Author : taubek
Score : 278 points
Date : 2024-12-24 10:51 UTC (2 days ago)
(HTM) web link (twitter.com)
(TXT) w3m dump (twitter.com)
| _____k wrote:
| Link: https://info.tokyo-digitaltwin.metro.tokyo.lg.jp/3dmodel/
| Retr0id wrote:
| What do I need to click to get the pointcloud version? I'm just
| getting regular untextured polygons.
| Timon3 wrote:
| 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 wrote:
| 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/t000029d000
| 00...
|
| 2: https://catalog.data.metro.tokyo.lg.jp/dataset/t000029d000
| 00...
|
| 3: https://fgd.gsi.go.jp/download/menu.php
| bamboozled wrote:
| So fun to explore, it has to be the greatest city on earth, just
| a marvel in so many ways.
| yieldcrv wrote:
| Feels like where Google Earth was 22 years ago
| lxdlam wrote:
| 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 wrote:
| Great for cgi and video games
| cpa wrote:
| 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 wrote:
| 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 wrote:
| Crashed on my old iPhone 6SE, but could tell it was getting
| cool!
| rnewme wrote:
| 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 wrote:
| One would reasonably assume threats could map surface-level
| objects from orbit. The Swiss (I hope) would consider this
| and react accordingly.
| jajko wrote:
| 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.
| SahAssar wrote:
| 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!
| johannes1234321 wrote:
| There are laws in Switzerland stating that essentially
| every cirizen has to have a bunker close by. Thus many
| homes got a bunker.
|
| https://www.swissinfo.ch/eng/culture/bunkers-for-all/995134
| SahAssar wrote:
| Historically that has been the case for for Sweden as
| well I think. Every older apartment building I've lived
| in (built before 1990-ish) has had bunkers in the
| basement, and usually it seems to be sized for more than
| just the buildings residents (although it is repurposed
| for storage these days). Thick steel doors and all the
| other tell-tales of old civilian bunkers.
|
| I'm guessing other European countries did this too.
| jazzyjackson wrote:
| I've definitely seen clips of heavy artillery tucked away
| into friendly barns and garden sheds. Maybe there's just
| wealthy people who like to collect large guns and there's
| some pride in turning away a Nazi invasion with their
| defenses.
|
| Here's a cute video I found discussing the line of 12
| fortresses protecting a little bottleneck of a river valley
| - he explains that the two camouflaged as villas are done
| so as not to be eyesores for the tourists.
|
| https://youtu.be/tPL9-L2gwzo
|
| https://www.slate.com/blogs/atlas_obscura/2015/06/12/the_vi
| l...
|
| EDIT a few more examples here A former
| infantry bunker is camouflaged as a medieval house in the
| town of Duggingen. Notice the half-circle windows, which
| appear to have been painted on Nearby mountains
| have been made so porous that whole divisions can fit
| inside them. There are weapons and soldiers under barns.
| There are cannons inside pretty houses. If you
| look closely, you can see a massive door in the hillside
| that would swing open - A Swiss Air Force Mirage III RS
| outside its mountain hanger.
|
| https://mathewingram.com/work/2022/02/14/switzerlands-
| hidden...
| yencabulator wrote:
| 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 wrote:
| 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 wrote:
| 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 wrote:
| How do they collect point cloud data at scale?
| lbotos wrote:
| 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
| lbotos wrote:
| slightly better:
|
| https://www.reddit.com/r/flightradar24/comments/u59zc2/off_t.
| ..
|
| https://www.yellowscan.com/knowledge/drone-flight-
| planners-t...
| anakaine wrote:
| 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.
| toomuchtodo wrote:
| Are there drones that can provide similar products at
| parity (versus needing aircraft)?
| araes wrote:
| 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 wrote:
| 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 wrote:
| 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 wrote:
| 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 wrote:
| Simplygon is used in MS Flight Simulator bcs it can generate
| seamless LODs. LOD 0 can simply be a Delaunay triangulation.
| RandomBK wrote:
| 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 wrote:
| Login-walled. Anyone have an archive that doesn't require endless
| cloudflare captchas (looking at you, archive.ph)?
| confooseddd wrote:
| xcancel.com with proxy enabled in its setting for media seems
| to work
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(page generated 2024-12-26 23:01 UTC)