Place VE Tiles onto sphere

Wildert

just as a side project, I'm trying to place virtual earth tiles onto a sphere made in WPF. I am using the 4 largest tiles created as a single PNG. My problem is with placing the texture coordinates, the continents are all the wrong size because I don't know what parts of the tile to match with the spheres latitudes (because I don't know where the latitudes are on the tile). Anyone know to identify latitudes on the tile the equator and the ends are no brainers, but in between...no idea.

2d image

http://farm1.static.flickr.com/124/329370551_124631d76b_m.jpg

3d attempt

http://farm1.static.flickr.com/145/329370550_16df4d398d_m.jpg

SoulSolutions

I think may come in really useful:

http://www.viavirtualearth.com/vve/Articles/WorldWind.ashx

and

http://www.viavirtualearth.com/vve/Articles/RollYourOwnTileServer.ashx

John.

Wildert

Note that I have already read both of these, I don't think either directly addresses how to place VE tiles onto a sphere (unless someone can tell me how to use proj4 to do it)

Wildert

Finally figured it out, embarrasing - didn't notice that VE only went between 85 and -85 latitude. once I realized this,

mercator spacing = ln(tan(lat) + sec(lat))

Latitude (deg)	Latitude (rad)	Mercator spacing	Mercator spacing scaled so 3.13 = 256 pixels
0	0	0	0
10	0.174532925	0.17542583	14.34196445
20	0.34906585	0.356378505	29.13577697
30	0.523598776	0.549306144	44.90860446
40	0.698131701	0.762909652	62.37179059
45	0.785398163	0.881373587	72.05682698
50	0.872664626	1.010683189	82.62855245
60	1.047197551	1.316957897	107.6680862
70	1.221730476	1.735415163	141.8791214
80	1.396263402	2.436246054	199.1756537
85	1.483529864	3.131301331	256

and thats how I draw my latitude lines on my image

Place VE Tiles onto sphere

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