[Xastir] Re: USGS DRG files no longer free.. (Tyler Allison)

[Tyler Allison]

> Once you have the four corner lat/lons, you can create an FGD file really
> easily.

Yeah I got that far as to figure out it was in UTM format and how to
convert it.

What I dont get is the part you call easy :)

Given the example of a known good tif/fgd file pair how does one go from a
listgeo output of:
...
Corner Coordinates:
Upper Left    ( 632249.045,5382177.092)  (121d12'24.93"W, 48d34'50.46"N)
Lower Left    ( 632249.045,5305885.652)  (121d13'50.68"W, 47d53'40.68"N)
Upper Right   ( 739487.845,5382177.092)  (119d45'17.40"W, 48d32'56.01"N)
Lower Right   ( 739487.845,5305885.652)  (119d47'52.37"W, 47d51'48.94"N)
Center        ( 685868.445,5344031.372)  (120d29'50.79"W, 48d13'27.20"N)

To an fgd file of:

1.5.1.1  WEST BOUNDING COORDINATE:  -121.000000
1.5.1.2  EAST BOUNDING COORDINATE:  -120.000000
1.5.1.3  NORTH BOUNDING COORDINATE:  48.500000
1.5.1.4  SOUTH BOUNDING COORDINATE:  48.000000

I just dont see how to derive -121.000000 as my West Bounding coordinate
from the data contained in the listgeo/cs2cs output

-Tyler