Where Photogrammetry and Autogen Collide
Posted Aug 19, 2020, 2:39 PM UTC
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This doesn't look like a photogrammetry/autogen issue. This just looks like the base satellite imagery was taken at different times of the day and then mosaic'd together. This is very common in satellite and aerial data
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Well, it's a bit of both.
Edit: And as usual, the down votes are perplexing.
Anyone care to explain why, when this is obviously data from separate times stitched together AND half auto-gen/half photogrammetry, that saying so is controversial?
Genuinely curious.
Edit mk2: Now I'm even more perplexed. I've made my comment all annoying and whiny, and I'm getting upvotes now? It's more down vote worthy now than ever before! I'm so confused!
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Probably because it's not both? The root of the cause is the imagery. If the imagery was not taken at different times the coloration of the buildings that have been auto generated would be the same. So really there is only 1 reason why this is happening. Orthorectified imagery that has been taken at different times. This is very common near municipal and city borders because some of these cities/municpalities will pay for high resolution satellite imagery for their cities and then make that data public, which is wear Bing gets it. Google also has a very similar approach
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Perhaps I have in incorrect understanding of the photogrammetry technology. if so I'm open to being schooled.
Please look at the same location from Windows Maps: https://imgur.com/9ifk1QG
Compare it to the image from FS. As I see it, everything on the left side, except that quirky yellow building, is proper, accurate 3D data, the same as the Bing data in Maps, and what I understand to be what's known as photogrammetry. While everything on the right side, lacking that 3D data, is autogenned by the AI in the sim.
So how is this not both autogen and photogrammetry?
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Photogrammetry in of itself is just another form of AI to create 3D scapes with other forms of assistance like LiDAR. The high resolution satellite image is the mesh and then it is thrown on top of Elevation and object data. Then using some 3d modeling software the 3d objects are 'cleaned up' and buildings can be replaced with their own 3d models typically built in a CAD software. Textures can be brought in from other photos or created by hand. Drones have been an increasingly popular tool for grabbing these textures and performing isometric measurements to automate building these models. But ultimately the source is a 2d orthorectified satellite image that is initally worked with. That's why even in the photogrammetry cities the textures still look muddy and the 3d models are not perfect unless they were modeled by hand.
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Do not care about upvotes/downvotes, most of people is stupid. Downvoting => you do not think like an imbecile, that is good.
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Downvotes are honestly more like upvotes at this point bra
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I still can’t decide which one to give myself. Think I’ll just leave it neutral.
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Like OP said it's both. Photogrammetry pictures are taken seperate from the flat orthoimagery so the lighting and time of year won't always match up very well.
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Just imagine living on the “wrong” side of the street and being unable to see your house replica.
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I imagined it. It's not that bad...
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I think both are autogen with different source images.
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The left half is definitely photgrammetry, except that yellow building which is kinda confusingly plopped in there. I went shopping for my flight stick in one of those buildings on Monday so I know which parts are accurate :)
That big green building at the bottom is a KFC btw :D
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Yeah I concluded it's autogen based on that yellow building. So they are mixing photogrammetry with autogen? Weird.
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Yeah, I didn’t even notice that building until just now. That’s the first I’ve seen them combined like that. Interesting.
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Imagine if you wanted to visit your own house and it was JUST outside of the photogrammetry range.
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that's what happened to me D: my city doesn't have it but the surrounding three do lol it's like half a mile away haha.
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Hobart? I noticed this there too, hopefully it's something on their agenda for down the track
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Yeah. When i first saw it from a distance, I thought it was just the sun lighting up some of the city while the rest was in shadow, and thought it looked great. Since I realized it was clashing data it kinda irks me now. City overall looks pretty good though.
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Broca Divide
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a battle of wills i see
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nice find
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Rome is exactly the same!
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Its not autogen .. Left side had better image sources while right was not up to date it seems .
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Makes me think of a picture I saw once detailing the difference in wealth of South Africa. Wish I could find it to share.
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I read Photogrammetry in squirrels accent lol
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Photogrammetry at a distance looks terrible, I might jsut turn it off
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Looks like the U.S./Mexico border
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Something, something, Lion King, something, We don’t go there simba.
EVERYTHING THE LIGHT TOUCHES
IS OUR KINGDOM
THIS ENTIRE CITY MUST BE PURGED!
FOR THE ALLIANCE!
wait I don't remember Mufasa saying that
I think it was Scar who said that.