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Sean -- who was a professor at city university and also -- noted geologist.
Who helped to create this mapping system.
That back when the entire downtown area was shrouded in dust and fog and whatnot.
Folks -- even exactly sure.
What they were looking at -- how to get around and what areas were hot spots and whatnot and then there was this very elaborate -- mapping system.
A put into place.
And it has been indispensable it was indispensable to the rescuers back then and they're doing it now ten years later.
And looking at how the whole area has evolved and what's supposed to happen and national and -- joins us right now on the set thank you for being with us listening -- country.
Until we have -- visuals of the what the ground zero site looked like prior to 9/11 2001 now we have BO World Trade Center site.
From back in that 2000.
And you can see there that's -- look like before.
Although I'm not.
And I fencing be there -- is okay that's the before shot business they were the two big buildings that's what it looked like up prior to 9/11.
And then we have also from the same Hunter College mapping system.
And that's what the site looked like afterwards and -- going on on that map and what we can see here and.
-- its final good enough for us yes.
This is an instrument called light are which was flown right after.
The event 9/11.
And it's -- it stands for light image detection and ranging and it basically.
It's flown from a plane.
And it sends literally tens of thousands of points per second kind of carpeting the terrain.
Because you know where you are using GPS.
And you know the speed of light in the -- -- shooting those you can get a precise XYZ coordinate from each of those.
When you take those coordinates and sort of stitching together like a blanket it gives you the concourse -- the terrain.
And this was absolutely absolutely invaluable during that period.
Because at the time the smoke shrouded the this site and the -- -- can penetrate the smoke.
So the images you just saw the first clear.
View of the site.
After the event.
Yeah and done now ten years later you're still using this mapping system that's right we actually flew the whole city -- mapping company flew the whole city.
And that gave us even more detail we're actually getting twenty points per square meter.
And all the flood modeling that was done prior to the -- to the hurricane.
That was all done using that data set because it gives you the contours of the train.
And then you -- sort of -- it and see where the water starts to come in with a different levels of search and now -- radar is just one the measures that you used to -- the -- you also use thermal energy.
Imaging testing temperatures -- Yeah you really use an array of sensors and thermal is very important because there was certain parts of the site which were just too hot to go on.
But at the time we thought there'd be people still.
Live down so the firemen needed to know where they can go where they couldn't go.
I don't know if you remember but at the time they were actually dropped in and pockets because the periphery switch to -- -- two to two going to.
I do remember that so.
I mean this mapping system out.
Almost immediately after 9/11 obviously had been working on the technology for a long time prior to that right this was a project that I worked on with the city of New York crowd kind of cooperatively.
And and we -- the stewards of of the data until 2004.
In which case department -- -- technology took over.
About at the time.
I was involved in in working on the map and and enhancing it and the other the city agencies had copies of it but they couldn't access them so the night of 9/11 I was the only one with a copy of the map.
And we actually started making maps that very night.
So tells more about this project it's through a City University specifically Hunter College one of the colleges in that in the city university system right.
But -- in the geography department -- -- center prevents -- special information and we've been partners with the city since the early ninety's when I came here I saw that the city didn't have a -- -- and I started working with some of the folks here.
And one of the things we're actually doing is we've taken recent imagery of the site.
And there's a big -- -- tomorrow night at the -- gallery where we actually showed the original images and we show how the site has evolved over the years we -- actually there.
August 24 and we did a -- are scanned from the ground.
Of the two memorial sites and so that's part of the show so it shows the evolution of the site before.
During the events and then as we've.
You know turned it into something really astounding and beautiful.
Yeah I just in time my you know the nine elevenths anniversary coming up so this Shell -- that as you refer to it and this isn't this has been touring the country these exhibits on us right.
This is an exhibit.
That it came about because my cousin who owns the gallery John Woodward.
Saw the image in the New York Times and He said wow that's amazing image and then -- saw my name under it and about a month later He called me up and said let's let's try to do this.
-- and then it toward the country.
And He actually had in storage -- for the last seven years and we just -- that it was kind of amazing to have her taken out of the box from the it's about fifty or sixty pieces so it's pretty substantial.
Wow and it's going to have a permanent home after all the ceremonies everything packed the ground zero that's -- -- the curators I think will be there tomorrow night to take a look at it to.
It's really quite a startling so it's it's the only example of what happened the physical manifestation of of that day.
And and it -- from all these different sensor types so you get these different perspectives.
On the sites and and what happened yeah.
So the funding.
Initially when you're doing this research prior to 9/11 was City University money -- the city of New York money yes that the -- was funded through the city of New York can and we worked as partners with the city and and you know we've had this long relationship with the city and in the -- graphic mapping -- geographic information systems and really the the event of 9/11 brought together.
Government and private industry in a very productive way.
The recovery effort would have been the same without that cooperation.
Us having that geographic base -- It's a very fortunate that you were doing the research that you are doing and that you are able to like jump in and provide these resources to be.
Rescuers on the ground all right -- -- thank you so much for joining us about best of luck okay.
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