I work with the NGA Prototype Global Shoreline map files extensively. They were extracted from Landsat ETM+ 2000 imagery by EarthSat (now MDA Federal). These map files show the most precise global shorelines. My blogsite, EVS-Islands , has had a number of discussions concerning these map files. Today, an unidentified party, visited my site wanting information on how one might convert these files into KML/KMZ format. I didn't have any current information so, I figured I would go ahead and give it a try. I used my mapping software, Global Mapper , to convert a portion of the PGS database, Region 6W - Pacific Islands, into KMZ format. The KMZ packet is 1.94mb. And you know, it works just fine. Any feedback would be appreciated.