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Comment by timdorr | Hacker News Reader

Interestingly, Bing Maps uses the technically accurate "Aerial" term: https://www.bing.com/maps

This reminds me,

Is anyone else remembering when Bing Maps was REALLY good? It had a 45 degree view of cities that looked insanely good, like Sim City. When you zoomed in too close, it switched to aerial imagery.

And it was all buttery smooth. What happened to that product?

I was working for the company producing the dataset for Microsoft at the time [0]. I’m not really sure what happened to the product though, but at the time (circa 2007) it was indeed revolutionary.

[0] http://www.blomasa.com/

Yeah, that was great.

Bing also allowed OpenStreetMap to use its aerial imagery for tracing. This helped OSM a lot!

Google, on the other hand, asks users to help them with their proprietary data with no compensation.

Before Bing, Yahoo allowed OSM to trace.

And others followed suit later, e.g. DigitalGlobe

If I recall correctly, founder of OpenStreetMap worked at Microsoft at the time.

Yes, they called it bird's eye view. I think they got rid of it.

It's still there, in emasculated form, but instead of being able to browse around in oblique mode you have to right-click on a point of interest and select it.

And developers wonder why users "don't like change"...

I think Bing made this change because they only have "birds-eye" imagery for a few cities.

emasculated → emaciated?

Yes it was actually called “Bird’s Eye” view several years back.

and when they first introduced it, I think they called it "bird's eye" view.

That's what I remember it being called when it was new. The quality of the photos were also way better than google

I think bird's eye view was the angled view, which seems to have disappeared? I cannot find it.

But it is now available with Google Maps! View some location in Satellite mode, and then click the "3d" button on lower right. And then you can view any place from various angles

It's a nice trick sure, using machine learning (I assume) to build 3d geometry from 2d satellite images, but it's nothing compared to the quality and fidelity of the images taken by low flying airplanes that Birds Eye in Bing actually used. Made house/apartment hunting a dream!

Looking at 3d google maps a bit more closely, it does seem they are capturing the sides of buildings that are not visible on the top down image. Still nowhere near the quality of Birds Eye, but I'd be interested in what other image sources they are using besides top down, and how they are captured.

It isn't machine learning, it's aerial photography shot at an angle with depth sensing.

For example, take an airplane and mount two cameras on it, one on each side, angled down at perhaps 45 degrees to capture ground imagery in each direction.

Add a LIDAR device next to each camera to capture a "point cloud" of the same area the camera is imaging.

Now you have photographic images with distance data for each pixel. You can use that to construct a 3D image that can be viewed from various angles.

(Disclosure: I work at an unrelated Alphabet company but have no personal knowledge of any of this, it's just my semi-educated guess.)

You probably don't even need the LIDAR. Since the airplane is moving, you can use the parallax between successive images to determine depth information. The technique is called "structure from motion"

Or include the position and orientation of the images' cameras and do a traditional photogrammetric bundle adjustment.

I don't think they're using lidar, but I don't know much about it.

However your comment made me think of this awesome article about Google maps and 3d buildings https://www.justinobeirne.com/google-maps-moat

I thought it had to be accomplished by satellite somehow. I looked at a very remote island in the southern Indian Ocean where I was stationed and the amount of detail in Bing Bird's eye view of the geography was astonishing. This was circa 2013. I would be very surprised if they flew a plane out there just for those islands, there are no flights or shipping routes passing by there.

I think your reply had the clue. "Where I was stationed". Seems like it was valuable and valuable places get attention.

Answering my own question: it still exists, it's on the right-click menu.

But only at a super-zoomed in level, not the "sim-city" level that made scrolling around whole cities a dream.

I think the product has never recovered since they migrated off Silverlight :(

Bing also uses the term "Bird's Eye" in the right-click options menu. Maybe Sergey wasn't so crazy?

Bird's eye is different.

How is that the Google team couldn't come up with this? The main argument for "satellite" was "it fits on a button". I actually think this was more about egos despite what the twitter story says.

Orthophoto is the common term in GIS circles.

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