Lat/Long degrees.

As far as I know, with ModelTypeGeographic the datum is specified
seperately via the GeographicTypeGeoKey.

Frank Warmerdam
warmerda@pci.on.ca

Geotiff_Information:
   Version: 1
   Key_Revision: 1.0
   Tagged_Information:
      ModelTiepointTag (2,3):
         0                0                0                
         -117.641169      33.903634        0                
      ModelPixelScaleTag (1,3):
         0.000650888889   0.000538666667   0                
      End_Of_Tags.
   Keyed_Information:
      GTModelTypeGeoKey (Short,1): ModelTypeGeographic
      GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
      GTCitationGeoKey (Ascii,17): "LONG/LAT    E000"
      GeographicTypeGeoKey (Short,1): GCS_NAD27
      GeogLinearUnitsGeoKey (Short,1): Linear_Meter
      GeogAngularUnitsGeoKey (Short,1): Angular_Degree
      End_Of_Keys.
   End_Of_Geotiff.


PROREP  Georeference Segment Report             V6.0 EASI/PACE  14:10 28-Nov-95
 
../projdemo/LONGLAT.pix                 [S    1BIC     512P     517L] 28-Nov-95

   1:GEOref    Type:150 [Georeferencing        ]   Last Update: 14:10 28-Nov-95
      Contents: Master Georeferencing Segment for File                         

 Output Georeferenced Units     :    LONG/LAT    E000
 Projection                     :    Geographic (geodetic)                   
 Earth Ellipsoid                :    Clarke 1866 (NAD 27)  
 Upper Left  Corner             :    117d38'28.21" W  Lon   33d54'13.08" N  Lat
 Upper Right Corner             :    117d18'28.49" W  Lon   33d54'13.08" N  Lat
 Image Centre                   :    117d28'28.35" W  Lon   33d45'51.80" N  Lat
 Lower Left  Corner             :    117d38'28.21" W  Lon   33d37'30.52" N  Lat
 Lower Right Corner             :    117d18'28.49" W  Lon   33d37'30.52" N  Lat
 Pixel Size (in Degrees)        :             0.00065 Lon           0.00054 Lat
   (Equivalent Deg,Min,Sec)     :        0d00'02.34"           0d00'01.94"