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Map of all the buildings in the world

gizmodo.com

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Re: Map of all the buildings in the world

#61

Post by kjkjadksj »

f4c39012 wrote: post #52
whizzter wrote: post #44

Earlier quoted context omitted.

It's machine-learning generated "slop" honestly. Looking at where I live and where I grew up the building heights are quite badly estimated. - Some groups of houses around here that are more or less identically built but on sloped terrain are reported to have widly differing heights - My neighbour building is reported to be half the height of this building (they're more or less equally high at 5 stories) - A small of…

Or, they subtracted a digital elevation model from a digital surface model, ran a point-in-polygon match against an existing building dataset, and labelled the difference as the height of the building. No ML needed.

Other comments said they fed 2d aerial imagery into transformer and thats it.

Re: Map of all the buildings in the world

#62

Post by TheTxT »

wongarsu wrote: post #40
1970-01-01 wrote: post #34

Earlier quoted context omitted.

If AI says a floating building is a building I will agree with it. It isn't wrong but it isn't right.

I'd draw the line at boats that are primarily used when docked. A house boat, a restaurant located on a permanently docked boat or Russia's floating power plants are all buildings in my book

Can’t wait for the "falsehoods programmers believe about buildings" blog post

Re: Map of all the buildings in the world

#63

Post by vhu2 »

Alphabet, please open your mapping data. I understand it’s your IP, but given that the value in Google Maps far exceeds the mapping data and won’t be replaced, think of all of the good that would come of it. For one thing, you wouldn’t have to worry about people posting inaccurate maps like these.

Re: Map of all the buildings in the world

#64

Post by morgenkaffee »

liotier wrote: post #21
wongarsu wrote: post #4

Github: https://github.com/zhu-xlab/GlobalBuildingAtlas Viewer: https://tubvsig-so2sat-vm1.srv.mwn.de/ (might already be hugged to death? When it works you get a heatmap when zoomed out, and 3d models with flat roofs when you zoom in far enough) Looks pretty cool. Obviously only covers above-ground buildings or above-ground portions of buildings. Also seems like it tends to view buildings built wall-to-wall next to e…

InfoReseaux remarked that this data is suspicious, to say the least: CC BY-NC 4.0 but contains ODbL licensed data coming from Openstreetmap - but also from Microsoft. Thread on the Openstreetmap forum: https://community.openstreetmap.org/t/is-globalbuildingatlas... Christian Quest sent the following message to the authors: "I’m writing to you because I’m surprised by the choice of data license you’ve set on the Globa…

Yes, this dataset is not CC BY-NC 4.0. Be careful.

Re: Map of all the buildings in the world

#65

Post by rurban »

josters wrote: post #60
plaguna wrote: post #10

So here is finally the data that I needed for my idea: walk directions from A to B while never leaving the shadows, suggesting bars and pubs where to wait while the shadows catch up and let you cross “safely” where before was sunny. Useful for scorching weather places like south of Spain.

Currently building something like this for my city. One major challenge I've come across so far is that most APIs will give you coordinates for an address of a place within a building but none of the free, paid or crowdsourced options have reliable information on outside seating polygons. Of course, you could always display the places around you with live shadow data on a map, leaving it up to the user to zoom in and…

You'd need stereo fotos from a low flying plane for this. Several cities are doing this for decades already. I've built such a 3D map for my city like 25 years ago.

Re: Map of all the buildings in the world

#66

Post by josters »

rurban wrote: post #65
josters wrote: post #60

Earlier quoted context omitted.

Currently building something like this for my city. One major challenge I've come across so far is that most APIs will give you coordinates for an address of a place within a building but none of the free, paid or crowdsourced options have reliable information on outside seating polygons. Of course, you could always display the places around you with live shadow data on a map, leaving it up to the user to zoom in and…

You'd need stereo fotos from a low flying plane for this. Several cities are doing this for decades already. I've built such a 3D map for my city like 25 years ago.

Are you referring to the outside seating polygons? Wouldn’t these stereo images still have a lot of noise (trees, cars, trucks, smaller non-building structures) obstructing the target areas?

Re: Map of all the buildings in the world

#67

Post by rurban »

josters wrote: post #66
rurban wrote: post #65

Earlier quoted context omitted.

You'd need stereo fotos from a low flying plane for this. Several cities are doing this for decades already. I've built such a 3D map for my city like 25 years ago.

Are you referring to the outside seating polygons? Wouldn’t these stereo images still have a lot of noise (trees, cars, trucks, smaller non-building structures) obstructing the target areas?

Outer walls, but mostly roof lines.

Some noise, but since houses have a certain size and being mostly rectangular helps. Just carports and garden houses are special.

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