MS Virtual Earth

[Sharky]

Greetings,

Please find attached an eclipse project of an implemenation of MS Virtual Earth Quad Key tile server for WWJ.

Bonus! Google Earth too - however I don't think google will be too happy about this

You can run the test class test.DemoBasic to look at VE/GE. The min zoom at which tiles are rendered is 6.

Projection mismatch?

MSVE uses a mercator projection which doesn't match wwj's. To overcome this problem, the quadkey tile for the eye point is calculated, then the lat/lon
box (sector) for the mecator tile is computed and finally the tile is rendered using wwj tile renderer.

In this manner WWJ will warp the mercator tile to fit the wwj ellipsoidal sector. This seems to work at high zoom levels (You can verify this by zooming and then comparing the images with the wwj urban area ortho, they match perfectly! - So do Google earth's).

Any comments are welcome.

So... What is missing? Meshes! A layer to access Google 3D warehouse and render COLLADA models.

I already have mesh classes & OBJ/3DS loaders but I can't make the model fit into WWJ geometry (Don't know how). Perhaps the WWJ gurus could assist. Please help!

Regards

[patmurris]

Mercator tiles can fit a sector and thus can go through WWJ surface tile renderer! Well done Vladimir.
I havent run it yet but i can tell you did quite a job by the source
You would just need to add a tile extent - which is a cylinder, and you would then be able to test for view frustum intersection, which is the key to handle larger sets of tiles when the view is pitched.

[amnesic]

Originally Posted by Sharky

Greetings,
Bonus! Google Earth too - however I don't think google will be too happy about this

I don't know exactly how they detect it, but after too much request you will have a "Download failed: 403 Forbidden url" and message like this :
"We're sorry...... but your query looks similar to automated requests from a computer virus or spyware application. To protect our users, we can't process your request right now."
instead of the image tile

Originally Posted by Sharky

Any comments are welcome.

Congrats, well done ! I'm very impress by your code.

I detected some trouble with WWJ 0.4.1 + you patch sometimes :
http://myskitch.com/amnesic/skitched-20071209-172027/

But I will investigate more. (some tiles seems to not be downloaded well)

p.s. :
Mac OX 10.5.1
Java run-time version: 1.5.0_13
NASA World Wind Java Alpha 4.1 0.4.1

[bull]

Nice, now we need someone to port it to .NET, the current plugin is pretty unstable.

[withak]

Originally Posted by amnesic

I don't know exactly how they detect it, but after too much request you will have a "Download failed: 403 Forbidden url" and message like this :
"We're sorry...... but your query looks similar to automated requests from a computer virus or spyware application. To protect our users, we can't process your request right now."
instead of the image tile

Apparently you can get your entire company's network banned from google also. Not that any WW devs would do such a thing of course.

[Sharky]

Originally Posted by withak

Apparently you can get your entire company's network banned from google also. Not that any WW devs would do such a thing of course.

Looks like google checks the # of client accesses to their servers, too many and they'll block you, however after a while you get access back.

I don't think google will accept a wwj layer to ge. I did it for the hell of it.

We could build an abstract quad key layer to any tile server: Ask, Yahoo, Google, MSVE.

Regards,

[Sharky]

Originally Posted by patmurris

Mercator tiles can fit a sector and thus can go through WWJ surface tile renderer! Well done Vladimir.
I havent run it yet but i can tell you did quite a job by the source
You would just need to add a tile extent - which is a cylinder, and you would then be able to test for view frustum intersection, which is the key to handle larger sets of tiles when the view is pitched.

Thanks,

I was wonderig why the tiles wouldn't render when tilting the globe. Any pointers/code on how to add this extent/frustum? I have no idea how to do that.

Cheers

[m_k]

Originally Posted by withak

Apparently you can get your entire company's network banned from google also. Not that any WW devs would do such a thing of course.

Chickens :P

[patmurris]

Originally Posted by Sharky

Any pointers/code on how to add this extent/frustum?

Start with TiledImageLayer - i think it has all the logic.

[Chade]

Originally Posted by withak

Apparently you can get your entire company's network banned from google also. Not that any WW devs would do such a thing of course.

I don't know what you're talking about.

The issue is that GE want you to use their api to access the tiles, not access them directly...