i wanna to know how to load part of a picture as a placemark in google earth?

[alec chen]

First of all,the picture is one-piece. 

for example ,when I get the orientation of a aircraft is left,i wanna to load part of the picture (part 1),when right ,i wanna use other part of the picture(part 2).

How can I make it? i'm wondering if Google Earth API have this method to read only part of my picture?

the picture is as below:

[barryhunter (KML Guru)]

No, KML does not have support for 'sprites'

However, there a <heading> 

https://developers.google.com/kml/documentation/kmlreference#iconstyle

You should jsut be able to use a single image of the plane, and then rotate it on a case by case basis. That way you dont need sprites, and those can all be done with a single icon.