Mr_Minton
Tourist
Reged: 07/03/05
Posts: 70
Loc: San Diego, CA
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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.
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PriceCollins
Inspector Detector
Reged: 08/10/05
Posts: 1635
Loc: Fairfax, VA, USA
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These are wonderful.
How can we get more?
Should these be moved to the Tools forum as a permanent download asset?
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JohnTucker
Tourist
Reged: 08/08/06
Posts: 5
Loc: Md,USA
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um, who digitized the red line? how?
Is it high tide, low tide, MLLW, or just a random guess?
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Mr_Minton
Tourist
Reged: 07/03/05
Posts: 70
Loc: San Diego, CA
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John,
The Prototype Global Shoreline (PGS) was developed by EarthSat (now MDA Federal) for NGA. It will become the replacement for World Vector Shoreline (WVS) (1:250,000). It is an approximation of the High Water Line, but it is not a Mean High Water Line. Read the White Paper for further information. The base imagery was Landsat ETM+ 2000 . According to one of the primary workers on this project, over 3,000 man-years were invested in this vector shoreline. I have a number of discussions and comparisons of the NGA PGS with other shorelines on my blogsite, EVS-Islands .
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