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TEDx Talks
Published: 2017-01-20
Source: https://www.youtube.com/watch?v=REfBWEJh1rk
I just wanted to explain before we go into the servants of what a this %HESITATION point twelve molding is about we sounded seven years ago the teenage together with professor gray Riquelme %HESITATION the borough tree bridging engineering and architecture it was supported by the Swiss National Science Foundation and school board the %HESITATION bowed and what happened is that we transferred a technology that pretty to a
engine is and surveyors and brought it into the realm of modeling and the way we argued with the the Swiss National Science Foundation previously third well there's no such thing as a landscape modeling lebar tree at the teach but could not even in Europe or probably worldwide we'd like to bring sort of large scale modeling a of from the virtual world into reality and make it
accessible to younger generations of researchers and students without factually what we did what you gonna see is going to require a little bit of a gymnastic to understand how this sort of visualizing a curse but actually what you're looking at in this picture is a still picture of a model it's a gigantic digital model showing the entire opined chain ranging no self over the gotta before
we start I think we should define first bought a point cloud is made all of it's actually made of millions if not billions of pixel point the pixel itself is a recent word in the history mankind at the pit in nineteen six seven at NASA actually in the jet propulsion lab Billingsley when they satellites and the and the spatial missions with sending back electronic image through
earth and it simply means picture element it's the smallest unit visible unit on a digital image will screed he goes back actually to nineteen century serious %HESITATION German person call Paul need cough first talked about a big print the basically that's what the entire cloud is made up of so what is a cloud it's basically a set of points the carry information each point carries in
a way a position relative to its neighbors and the black space in between is simply no information and as I said until recently these data sets his point Clausen used by very serious engine is civil engineers mostly to draw precise technical plans and elevations on construction sites like dams and other things and the image itself for the model itself was never made fully the information was
extracted and ninety nine percent of the point cloud information thrown away what happened with the school board trees we bridged two fields engineering and creative architecture and kept the entire data sets as they were and started working with these on we'll be models that count billions of points basically each point carries the famous the GPS coordinates the X. wiser that assisted flock latitude longitude and elevation
and you have within this family of point clouds the so called control points the anchor the entire clown in a precision with talking about millimeters in in terms of hype or with the position is within millimeter precision these control points are actually riveted to a series of satellites to go around the earth and really give that fixed position the control point also helps to bring different
sets we use drones we use %HESITATION tres releases we the lidar Movado because the register elements and this control points allow us to bring things together so much for the technical explanation I think the best way to explain that it's the start again with the point within a point cloud so the you come to the stand the sort of phenomenon that I cold trans stopped of
scale but what happens is you can go from a minute scale of an object to the very broad scale of the territory seeming seamlessly and that's quite extraordinary so let's stop all journey here we gonna see a pixel point retracting into the virtual digital space of the new name out tunnel this is actually a data set that was given to us by the off transit of
the entire new high speed rail tunnel in Switzerland the longest in the world and here we're retracting out of the south portal which is in Bodo very slowly and we gonna pull out at the scale of an object and as we go up in the air we gonna literally stopped seeing him this is all a point cloud data set we gonna something the model in a
much bigger picture of the environment %HESITATION here you can see raindrops falling on the tunnel entrance they will scan of the forest the mountains adjacent to that it's a true so what's extraordinary with the point cloud when you use it as general data set is it's a virtual model it's a still image but it house ex strode Marie precision this is just a section of the
model that we been scanning the each each of the last seven years of the landscape modeling in visualizing the board chief what you see the sort of strange angles streak on the upper part of the the planet picture is actually the data sets that we took their embedded in the Swiss topo data set and what you see on the need is the section through the mountains
with that high speed tunnel going through if you look at the screen you also see that her thin line in the middle of the picture which is literally the tunnel but you see it's semi transparency through the pixel points of the model this is the tunnel you all know it it's been very highly publicized since its inauguration last June it is quite unreal one really doesn't
go with the one is under the ocean or on to the mountain the relationship the landscape has been in a way lost here and of course when you look at what has happened with this highly technical it's sort of device a is that you can cross Yeltsin roughly two minutes you to take two weeks when good Sir went over the Alps and basically what you seeing
graze the entire mountain landscape having disappeared what's good though is that the Swiss train company the SBB has provided for us a virtual compensation they have within the trains goes across the tunnel monitors that talk about your new horizon it's labeled underneath each screen and probably it's the absence there all of that means that the new horizon appears on a virtual screen so what we say
about that I think we can go back to the point cloud trying to understand how it actually works as a model and is a piece and I think the best way to designate that she explained that the model is like a crust here we're just south of the god thought going down we will be monitoring the earth's crust it's really showing in the most intricate details
the old tremolo Rhoden you traveled a road it's almost like a big take a digital cake which is empty underneath it's just really showing the circus in the most intricate detail what you're gonna start seeing now though is the tunnel below that line that appears and transparency which is actually the ultra balm tunnel the first couple but we gonna see Alex appearing in transparency through the
cross the second line above that looks like a a clothes hanging line is actually the name up tunnel which is for the a east and as we cut through the mobile is if you cutting through a piece of cake we see with exact geographic position the depth of field with the two tunnels below the earth crust that's quite a bit Wilder ring image and that's with
these point cloud data sets are actually producing the sort of revolution sorts again the point cloud is a surface that is secure referenced and that really shows an extraordinary amount of texture here you see the texture in front of the terrain you'll see the transparency of the entire mountain chain behind it goes all the way to the mat to hold on the far left this is
part of the model again and here we see the journey north self so I'll just let you travel we can go through the portal that we just hopeful what's extraordinary with this vision is that we actually come down and within the recognizable human skill we see things in very very precise positioning I think that's what's the most important thing here we can get to the portal
that we just left a few minutes before and what you gonna see very quickly is the portal and then the double pipe of the train line veering to the right under the mounting crossed and then shooting into the mountain itself transparently here we going up the hill towards the Gotthard and then we'll come down over the devil speech below you see the motorway tunnel and transparency
that's really what's absolutely fascinating with these models so it's actually a massive scale digital model that can be used to arriving on the Gulf thought again and then we go down again with the moat autobahn bridge underneath and the Goshen in a school the devil's bridge the well known double spirits on the bottom of the picture it cetera going through we've been deploying techniques like drones
before they were celebrated that was ten years ago %HESITATION now they're sort of ubiquitous we've been using the lidar system we even reserve the autobahn tunnel for a self close it often measured it we even have been going to very cold places Mrs Mateus scanning the go cart what I think is really important to understand is how this really works and what its applications are for
the future it's not just a nice to have model of the Swiss Alps here we can ditch me work as engineers section we gonna cut through the infrastructure the pours out of the %HESITATION Alps in Goshen and then here you see a very very precise section showing how the motorway the railway bridge at several works and the applications there have been multiple we've worked in Southeast
Asia in Jakarta monitoring flood problems in slums we've been rebuilding artificial islands in Venice with the same technology we been working in Israel and Jordan on the %HESITATION not hiring your insights to document archeological elements and basically what we're able to do with this type of modeling is not just map the Alps but actually simulate flow a simulate new projects and use it almost as a
tool participation we've trained hundreds of young researchers and students for it and I think that's really the goal of the slippery tree so a basically the entire team behind the Gulf Tareq project which was shown a by the way in the Venice Biennale they %HESITATION two years ago and will be shown again at the teats center at the beginning of next year in June a is
