GroundOverlay image resolution

[TimA]

Hello all,

I have a TIF file at a high resolution that I am using as a Ground
Overlay in GE. Below is the simple kml code I am using to place the
overlay.

The image places in the correct spot, but it is very low resolution
and blocky. The original image is _not_ low resolution and looks very
good in any image viewer.

So my question is... am I missing some parameter in my KML to get
the overlay to appear sharper?

I have a kmz file with the kml and image that I can email if some
kind soul wants to have a look at it.

Thanks,

Tim

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document>
<name>TJAPres4.kml</name>
<GroundOverlay>
<name>TJA Pres 4</name>
<Icon>
<href>TJAPres4.TIF</href>
</Icon>
<LatLonBox>
<north>36.4868316744473</north>
<south>36.4148976775595</south>
<east>-107.022019813673</east>
<west>-107.095128302789</west>
</LatLonBox>
</GroundOverlay>
</Document>
</kml>

[vzett]

Tim,
Beyond a certain resolution, Google Earth will subsample the image for
loading performance.

For high resolution images, you need to generate a 'super overlay'
wherein you create a pyramid of smaller 'tiles' of your large image at
different resolutions and then use region coded KML to manage the
loading. Usually these tiles are in the 256x256 to 512x512 size
range.

- Virgil
EarthNC.com