[Xastir] USGS DRG maps again

[Curt Mills, WE7U]

On Wed, 7 May 2003, J. Lance Cotton wrote:

> According to the 'listgeo' program that is included with the libgeotiff
> package, a sample of my geotiff map is like:
>
> jlc7944 at www:~/src/libgeotiff-1.1.4/bin> ./listgeo
> /usr/local/xastir/maps/filled/usgs_drg/o30096d3.tif
> Geotiff_Information:
>     Version: 1
>     Key_Revision: 0.2
>     Tagged_Information:
>        ModelTiepointTag (2,3):
>           0                0                0
>           751164.128       3378008.64       0
>        ModelPixelScaleTag (1,3):
>           2.4384           2.4384           0
>        End_Of_Tags.
>     Keyed_Information:
>        GTModelTypeGeoKey (Short,1): ModelTypeProjected
>        GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
>        ProjectedCSTypeGeoKey (Short,1): PCS_NAD27_UTM_zone_14N
>        PCSCitationGeoKey (Ascii,25): "UTM Zone 14 N with NAD27"
>        End_Of_Keys.
>     End_Of_Geotiff.
>
> PCS = 26714 (NAD27 / UTM zone 14N)
> Projection = 16014 (UTM zone 14N)
> Projection Method: CT_TransverseMercator
>     ProjNatOriginLatGeoKey: 0.000000 (  0d-2147483648' 0.00"N)
>     ProjNatOriginLongGeoKey: 0.000000 (  0d 0' 0.00"E)
>     ProjScaleAtNatOriginGeoKey: 597859448.000000
>     ProjFalseEastingGeoKey: 0.000000 m
>     ProjFalseNorthingGeoKey: 0.000000 m
> GCS: 4267/NAD27
> Datum: 6267/North American Datum 1927
> Ellipsoid: 7008/Clarke 1866 (nan,-214748365.00)
> Prime Meridian: 8901/Greenwich (0.000000/  0d 0' 0.00"E)
> Projection Linear Units: 9001/metre (1.000000m)
>
> Corner Coordinates:
> Upper Left    ( 751164.128,3378008.642)
> Lower Left    ( 751164.128,3361386.070)
> Upper Right   ( 765084.954,3378008.642)
> Lower Right   ( 765084.954,3361386.070)
> Center        ( 758124.541,3369697.356)
>
> Those coordinates look like UTM things. Am I right? I don't know for sure.
>
> > Are all of your geoTIFF maps messed up, including ones that used to
> > work, or is it just newer maps that don't work right?
>
> All of my geoTIFF maps are like this, all of them have worked in that past.
> Since you say geoTIFFs work fine on your system, this yet may be unique to me.

Or your particular library versions.

Here is the output from one of my maps that is working just fine.
Looks a bit different here and there from yours, but I'm not sure
yet there's a problem here.  Just more data:


> listgeo o48123h1.tif
Geotiff_Information:
   Version: 1
   Key_Revision: 0.2
   Tagged_Information:
      ModelTiepointTag (2,3):
         0                0                0
         489672.772       5428102.43       0
      ModelPixelScaleTag (1,3):
         2.4384           2.4384           0
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeProjected
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      ProjectedCSTypeGeoKey (Short,1): PCS_NAD27_UTM_zone_10N
      PCSCitationGeoKey (Ascii,25): "UTM Zone 10 N with NAD27"
      End_Of_Keys.
   End_Of_Geotiff.

PCS = 26710 (NAD27 / UTM zone 10N)
Projection = 16010 (UTM zone 10N)
Projection Method: CT_TransverseMercator
   ProjNatOriginLatGeoKey: 0.000000 (  0d 0' 0.00"N)
   ProjNatOriginLongGeoKey: -123.000000 (123d 0' 0.00"W)
   ProjScaleAtNatOriginGeoKey: 0.999600
   ProjFalseEastingGeoKey: 500000.000000 m
   ProjFalseNorthingGeoKey: 0.000000 m
GCS: 4267/NAD27
Datum: 6267/North American Datum 1927
Ellipsoid: 7008/Clarke 1866 (6378206.40,6356583.80)
Prime Meridian: 8901/Greenwich (0.000000/  0d 0' 0.00"E)
Projection Linear Units: 9001/metre (1.000000m)

Corner Coordinates:
Upper Left    ( 489672.772,5428102.434)  (123d 8'28.36"W, 49d 0'27.72"N)
Lower Left    ( 489672.772,5411694.441)  (123d 8'26.86"W, 48d51'36.36"N)
Upper Right   ( 501937.924,5428102.434)  (122d58'24.61"W, 49d 0'28.02"N)
Lower Right   ( 501937.924,5411694.441)  (122d58'24.89"W, 48d51'36.66"N)
Center        ( 495805.348,5419898.437)  (123d 3'26.18"W, 48d56' 2.30"N)

-- 
Curt Mills, WE7U                    hacker_NO_SPAM_ at tc.fluke.com
Senior Methods Engineer/SysAdmin
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