Scaled overlay

[SteveG]

I want to take an image file containing an object plan view then place
it on GE at a given point and azimuth ... at a given scale.

I think that I have got the scale aspect correct using an XLS
calculation but I have problems with the rotation.

What is the parameter that controls azimuth of the image? <heading>
seems to apply to the map view.

What is the reference point for teh image that corresponds to the lat
& long? Is it the centre of the object?

Thanks

Steve

[Jonathan van Tuijl]

SteveG wrote:
> I want to take an image file containing an object plan view then place
> it on GE at a given point and azimuth ... at a given scale.
>
> I think that I have got the scale aspect correct using an XLS
> calculation but I have problems with the rotation.
>
> What is the parameter that controls azimuth of the image?  <heading>
> seems to apply to the map view.

See the spec:
http://code.google.com/apis/kml/documentation/kml_tags_21.html#groundoverlay
It's rotation in LatLonBox.

> What is the reference point for teh image that corresponds to the lat
> & long?  Is it the centre of the object?

I think it's the average of north/south and east/west.

Jonathan