Google Earth transparency

[Heryk Julien]

Hi,
Another tip that might help you:
I had some problems when the extent of my GE (Google Earth) viewer was much
wider then my mapfile extent. Ge could not load mapserver's png getmap
image. To fix that, all wms calls to my mapserver wms service are redirected
to an my cocoon server (xml based server) which restricts the wms extent
before fetching the wms getmap image from mapserver. Works good!

Demo: Click on the GE link at the bottom this page to get the kml (wms
Mapserver based) service (prototype site)

http://ntserv.gis.nrcan.gc.ca/cocoon/ngwd/services/featureCollection/app-map?locale=en&REQUEST=GETFEATURE&FEATUREID=ca.nb.gov.wmslayerref.23139&SESSION=Public

FYI, here is my mapfile output format:

OUTPUTFORMAT
  NAME png
  DRIVER "GD/PNG"
  MIMETYPE "image/png"
  IMAGEMODE PC256
  EXTENSION "png"
  FORMATOPTION "INTERLACE=OFF"
  TRANSPARENT ON
 END
TRANSPARENT ON

Cheers
Héryk
NRCan