IOS launch image sizes

Question

The ios App Programming Guide states the following launch image sizes for iPad apps:

1024x748px and 2048x1496px.

Yet in XCode, I am given the fo

Answer 1

iOS Launch Image Sizes - Xcode iPhone/iPad

1x                = 320 x 480    
2x                = 640 x 960
Retina 4          = 640 x 1136
Retina HD 5.5     = 1242 x 2208
Retina HD 4.7     = 750 x 1334
Retina HD 5.5     = 2208 x 1242   (landscape)
iPad 1x           = 768 x 1024
iPad 2x           = 1536 x 2048
iPad 1x           = 1024 x 768    (landscape)
iPad 2x           = 2048 x 1536   (landscape)