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I this is my quest from med about the

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dog here we've got two photos of Toronto

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taken from different altitudes from

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approximately the same location in in

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Hamilton Ontario this lower one here is

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taken from down near sea level and you

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can see that you can only see the tops

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of the buildings the upper one here is

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taken from a much higher altitude upon

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mountain park view which is about 400

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feet above the lake now I've taken both

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these photos and I put them into Google

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Earth and I've overlaid them from

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approximately their correct location now

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this is the lake here the lake is at

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about 200 and something feet above sea

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level and Google Earth doesn't render

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the surfaces of lakes very well so you

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have to add a flat path like this onto

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the lake so you can see the surface of

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the lake and that will actually appear

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to be above where Google Earth is

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rendering it let's look at the first

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view first photo from the mountain park

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view and here it is I've aligned it with

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the horizon and I've turned on 3d

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buildings and the 3d buildings will pop

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interview in a minute and you can see

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that it lines up with what we can see in

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the 3d 3d view is the same as in the

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photo view now you see the red lines

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here are the actual service of the leg

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which from this viewpoint is very

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similar to what Google Earth renders but

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you can see it's actually slightly above

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so what you see in this photo matches

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very well what we would expect to see

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from the curvature of the earth owning

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obscuring a very very small portion of

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the bottom of the the building we can

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look a little closer here if we click on

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get info on that we can see the actual

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settings that I've used and I can change

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the transparency so you can see what is

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obscure at this area down here very

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small area at the bottom is going to be

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obscured let's have a look at the other

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photo down from Van Wagner's beach and

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because we have much close

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to actual sea level the the curvature of

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the earth is obscuring a lot of the

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buildings let's look I have a closer

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look at that and I'm going to change the

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transparency again and you can see this

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all this area of Toronto is missing from

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this photo because it's obscured by the

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curvature of the earth and this this red

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these red lines here are the actual

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surface of the lake yeah and i think i

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have been slightly off there but you can

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see the basic idea is that the the lake

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itself is obscuring all this lower

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portion of toronto and enter

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demonstrating the curvature of the earth

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ok that concludes that but i'm going to

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show you real quick how i actually do

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this let me cancel that out here what

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what we do with the photo here you take

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the link to a photo and you can just use

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a link to one of the photos posted in

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meta bunk and then you've got to find

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where the viewpoint is so let's say

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we're taking the one down by the beach

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I'm just going to pick a different spot

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here just slightly further along the

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beach I click all the way down actually

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first of all I need to get the viewpoint

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the actual link darkness beach view get

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in fur alright so this here is the

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original link to the picture so I'm

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going to use this as a photo overlay now

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what I've done to make things a bit

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easier for myself is I've added this

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purple polygon here which indicates

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where the tower is the rugged the way

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that's done is you oops you add a

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polygon and you just do click click

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click click make a four-sided polygon

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then you change the altitude to be

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relative to the ground and 10,000 meters

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and click on extend sides to ground you

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can change the color if you like

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and then when you look at it from a long

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way away you can see exactly where

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something is and I've done this one over

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the CN tower in toronto which is the

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most noticeable one lock so then we just

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get rid of that and go back to the beach

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over here so i go down to the beach and

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go down into ground level view just keep

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clicking until you get down to the

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ground and line myself up with Toronto

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over there and then I click on add photo

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it's just up in the menu add photo and I

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artists beach now if I click on the

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photo button here you see you get all

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these numbers here and what you can do

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is change the transparency so it's

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transparent and then you need to adjust

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these until you can you made the field

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of view as narrow as possible you can

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see that the Toronto 3d model over here

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is getting bigger and bigger so you just

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adjust this until it's about the same

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size then you will adjust things like

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the tilts will actually what you need to

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do first is just exit the ground level

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view and then go back into that photo

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otherwise it gets little confused

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alright so we change the transparency

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again we change the field of view until

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things are about the same size we change

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the tilts to line things up and then we

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change the heading so it's perfectly

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lined up but then you just need to do

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fine adjustments until this is correct

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and then click on OK and then you will

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have the overlay you see I didn't finish

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doing it here but of course I've already