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Belgian Amiga Club - ADF Collection
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BS1 part 27.zip
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BS1 part 27
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Panorama3_d3.adf
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MtFairweather.doc
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1993-04-17
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Mount Fairweather/Glacier Bay
The Glacier Bay area in Alaska is famous for its rugged mountains
and tidewater glaciers. Just two hundred years ago the entire bay
was filled with ice, but the glaciers retreated dramatically in the
late 19th and early 20th centuries. Now the remaining glaciers are
at the heads of fiords some 50 or 60 miles long. Between Glacier Bay
and the Gulf of Alaska is what is now a long peninsula with a chain
of towering mountains rising abruptly from the sea. The highest is
Mount Fairweather at over 15,000 feet, and Mount Crillon is over
12,000 feet. The center of the peninsula is occupied by the Brady
Glacier, an enormous icefield feeding streams of ice in several different
directions. This spectacular scenery is all stored on this disk,
waiting for your exploration.
The data is from two one degree DEMs called Mount Fairweather East
and Mount Fairweather West. Each quadrangle is split up into six
subquadrangles labeled with two digits, the first increasing from West
to East and the second increasing from South to North. The points in
the DEM are spaced every 3 seconds of arc from South to North and, to
make the linear separations more equal, every 6 seconds of arc from
West to East.
Mount Fairweather is at the east edge of the "W02" subquadrangle.
Most of Glacier Bay is in the "East" quadrangle. Some arms of Glacier
Bay extend beyond the quadrangle edges to the East and to the North.
This data may be available on a separate disk.
The quadrangles and their relation to neighboring quadrangles are
indicated in the diagram below. The quadrangles on this disk are
outlined with asterisks. South is to the left and North is to the right,
as in the display of the GeoRama program. In GeoRama the shapes of
mountains and coastlines may look distorted because of the different
scaling of point separations in the South-North and West-East directions,
but the proper correction factors are applied in creating the Panorama
data file so everything will be properly to scale in Panorama.
West
------------------***************************************
| * | *
| Mt Fairweather * Mt Fairweather | Mt Fairweather *
| West 00 * West 01 | West 02 *
| * | *
|------------------*-------------------------------------*
| * | *
| Mt Fairweather * Mt Fairweather | Mt Fairweather *
| West 10 * West 11 | West 12 *
| * | *
********************-------------------------------------*
* | | *
* Mt Fairweather | Mt Fairweather | Mt Fairweather *
* East 00 | East 01 | East 02 *
* | | *
*--------------------------------------------------------*
* | | *
* Mt Fairweather | Mt Fairweather | Mt Fairweather *
* East 10 | East 11 | East 12 *
* | | *
**********************************************************
East
Tidewater glaciers are difficult to render properly, and without
additional "feature" data one has to choose between making the glaciers
reach the sea, but then also having low flat areas covered with snow,
or having lowland "forests". The MtFairWth.DEMset file accomplishes the
the first, by having all three contours be "snow/ice", with subtle
variations of color and texture, and the GlacierBay.DEMset file
accomplishes the second. Try them both and experiment to see if you
can come up with something better.