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hi this is my quest of medibang org and

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this is a image of Blackpool with

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Blackpool Tower in the middle from the

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viewpoint of Hoylake which is about 30

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miles away and the view is set up to

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simulate kind of what you would see on a

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flat earth the reason for doing this is

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so you can compare this image against

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the photograph taken from Hoylake or

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wherever you like and see what the

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difference is which gives you a good

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idea of what's going on with refraction

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and what's being hidden by the horizon

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but how do you actually get an image

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like this in Google Earth it's actually

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a little bit fiddly Google Earth stiffly

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isn't really set up to do things like

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this so let's just go step by step

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through the process all right so if we

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go to to Blackpool we get this nice 3d

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model of Blackpool if we go to a high

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Lake I'm just going to use the search

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function here if you get a whole Lake

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you see it's good apart to see Blackpool

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from right down over here it's a way off

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in the distance and if you zoom in it's

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just going to kind of change the camera

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position so what we do is this little

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trick first of all we're going to make

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blackboard easier to find so we go back

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back to Blackpool Tower and what we're

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going to do is create a market so we can

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see Blackpool Tower from a greater

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distance with with E so I'm going to do

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that by creating a polygons that are

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going to a new polygon and I just click

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on the four corners of the tower that's

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going to create a polygon and if I click

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on the altitude here I do absolute and

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then I just make it some large value

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like 50,000 feet meters click on extend

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sides to ground it creates this big

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pillow type fit in which you can see

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from a long way off in in Google Earth

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now if I go back to high Lake it makes

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it a lot easier to see where Blackpool

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is from that position

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so let me now go to the next step which

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is to get right down to the beach now

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you could use the little low and

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dragging the street view here but it's

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actually better if you just go all the

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way down in in Google Earth and just get

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as low as you can to the actual position

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you might let's nap in the street view

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but you can turn that off anyway let me

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just go into the next thing which is

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adding a photograph so I do add photo

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and I'm going to use this special link

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that I here's which you can use you

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don't have to use this but it's just an

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easy way of doing it it's made a bump a

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dog sliced beef you have to use the HTTP

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slash WWWE Bangla org slash T if I press

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the tab here you'll see added this photo

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overlay which is just a transparent

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image there's nothing special about it

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and I was going to give it a name

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I like to like for power demo and you

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see we get all these values down here

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now if you did this from the street view

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you would have to click on ok then go

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back into it we have to click on exit

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Street View and you have to go back into

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this because otherwise if the camera

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gets messed up here because I just set

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the position it's going to work just

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fine I'm going to set the tilt back so

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that the horizon is more or less in the

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middle and I know just the heading so

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that we are heading more towards

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Blackpool Tower basically getting this

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in the middle here that up a little bit

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and then this down here is the field of

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view which is the field of view of this

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image here which is 50 degrees and if we

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zoom in to something more like p900

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maximum viewing 2000 millimeter lens

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that would be about 1 degree so I'm

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going to go 52 degrees here and I got to

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adjust as you zoom in

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oops and a little bit more you see

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something poking through the bottom

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there now once you've got it zoomed in

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as far as this one and a half degrees

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you can click out then I can turn off

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this polygon that I added and then I can

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go back into the photograph you can see

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blackboard our just starting to poke out

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from the horizon there zoom in a little

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bit more now you can see it doesn't look

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very good at the moment

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that's because Google Earth caches the

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the polygon model there is popped

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interview it has to wait a while for it

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to come back in sometimes you have to

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wait quite a long time depending on your

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network conditions and just what Google

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Earth is doing it can be a little bit

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bit fiddly so it's being obscured by the

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horizon this is a approximately what you

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would see from from Hoylake obviously

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Google Earth isn't accounting for

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refraction so you probably actually can

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see quite a bit more than this you might

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see less it depends on the atmospheric

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conditions but you'll probably see a

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little bit more than this only probably

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going to see it a bit distorted so to

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view the simulated flat earth model all

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I do is I change the altitude to just a

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value that you can see the coastline

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from so you can just modify it here by

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rising up and you'll see the horizon

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dropping there it moves slowly but if

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you let go and then really again of

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something fast because it's moving

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relative to the original position you

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can just type something in here like 150

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meters but I kind of like to do it

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manually so you can see that horizon

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boiling or what's being revealed you can

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see actually the horizon dropping away

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as well as you get higher even than my

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tilt angle isn't changing and that you

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can see the background being revealed

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now something to note is that this isn't

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the perfect flat earth model

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plus earth view because the hills in the

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background are going to be at the wrong

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angle because they're so far behind the

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towers and they're going to be a bit of

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a difference between the the buildings

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as well especially here because it's a

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bit of an angle but it's going to give

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you especially for this oceanfront

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right here it's going to give you a very

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accurate representation and it is going

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to give you a very good representation

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of what you see would see from voile so

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I'm going to keep going here until I can

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see the beach and I'm just going to tilt

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down a little bit more and since I'm

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here I'm going to zoom in so I can see

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the beach and I'm going to raise my

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pupil took a little more Google Earth

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sometimes jumps around it's a bit fiddly

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and you have to kind of fight it a bit

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but you'll get there eventually all

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right so I can't quite see the boardwalk

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in the front there so I'm going to keep

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going and that's yes I think you can set

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right there I think here you can see one

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issue is a boardwalk the easy way to

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test is just to keep going and you know

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set some quite high value in so I'm

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going to stick in 300 meters here oops

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and then just tilt down and we can see

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what we can actually see again it's

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going to take a while for things to come

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setting a high view point like this will

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give you some idea of any parallax

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problems you might have with buildings

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being too far behind each other but you

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can see here this Pierce logic board was

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appears a boardwalk here this is the

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beach in front and there's a water line

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down here but this is a business sloping

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Beach down here you get quite hyped high

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tides in Blackpool kind of difficult to

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say exactly where the water line is

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because the tides vary so much okay so

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I'm going to move this back down to 175

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metres which I know is about right you

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can be able to go a bit below that 150

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[Music]

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looks about right

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okay so just adjust the tilt and I can

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just change this field of view make it a

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bit bigger than the zoom out again so

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you can see more of the coastline these

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nasty Pollock you know polygonal

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buildings but if you wait a while I'll

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pop back into view you can change this

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transparency here and get rid of the

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frame that doesn't always work but we

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did right now so move this off to the

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side and here is your simulated flutter

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view or blackboard remember it isn't

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exact because these hills aren't going

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to be quite right because it's so far

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away but for buildings that are

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reasonably close to each other it's

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going to give you a good relationship