Author Topic: Streetview and Apple Maps  (Read 1046 times)

Streetview and Apple Maps
« on: 30 September, 2017, 01:39:26 pm »
While Streetview has always held a charming fascination for me I do, after all, appear on it in (at least) three distinct locations (boastpost :smug:) I understand that much of it was achieved by someone driving, tricycle-ing or back-packing a multi lens camera all over much of our planet, and then a machine joins up the images.
However, here is a screen grab from Maps which comes with Mac OS these days

I can rotate that image, tilt it, enhance 15 to 23 (sic) , pan, zoom in and out pretty much as much as I like.
Can anyone explain to me how were all those views were captured?

Zipperhead

  • The cyclist formerly known as Big Helga
Re: Streetview and Apple Maps
« Reply #1 on: 30 September, 2017, 08:58:17 pm »
I can recommend having a play with Google Earth VR.

I'm sure something1 could make some suggestions.
Won't somebody think of the hamsters!

Re: Streetview and Apple Maps
« Reply #2 on: 30 September, 2017, 09:07:56 pm »
Can anyone explain to me how were all those views were captured?
The viewing algorithm assumes that facades are flat, and creates intermediate views from just a few angles.

https://www.google.co.uk/maps/place/Coventry+Cathedral/@52.4053009,-1.5103341,237a,35y,37.78h,45t/data=!3m1!1e3!4m5!3m4!1s0x0:0x6dbdadba5a0f7d8e!8m2!3d52.4083097!4d-1.5071011

look at the three-lamp lampposts in front of the building. The algorithm puts stone-coloured infill between the individual lamps.

On the 2-D photos in streetview, the lamps are visible, but it is only our experience of lamps, ironwork and stone buildings that allows us to work out what is going on. The computer gets it wrong.
Quote from: Kim
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Re: Streetview and Apple Maps
« Reply #3 on: 30 September, 2017, 09:20:23 pm »
https://www.google.co.uk/maps/place/Coventry+Cathedral/@52.4063787,-1.5155976,75a,35y,79.86h,76.43t/data=!3m1!1e3!4m5!3m4!1s0x0:0x6dbdadba5a0f7d8e!8m2!3d52.4083097!4d-1.5071011

The cars on the rooftop car parks have fooled it completely. I guess that most moved between the views at different angles. Also the algorithm is trying to manage on far fewer flat polygons that is needed for a good image.
Quote from: Kim
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