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Re: [udig-devel] Problem with recognizing geotiff tags - I think
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Hey,
Jody's running ahead with solutions but I don't yet understand what your
issue is. You say the coordinates are NE which presumably means northing
and easting which sounds perfect for a UTM. Long/Lat would be wrong.
UDig is showing your CRS is WGS84 which is what your output also claims
What are you getting and what are you expecting?
--adrian
On Thu, 2007-11-22 at 10:31 -0800, Hugh Jennings wrote:
> Hi,
>
> Just want to know if this is a known problem or an incompatibility with
> some other software we use.
>
> I can display geotiff's we have created but the geotiff tags don't seem
> to be read completely.
>
> The image is in WGS UTM Zone 39. Below is the result from listgeo
>
> listgeo uae_50m_dem_csh.tif
> Geotiff_Information:
> Version: 1
> Key_Revision: 1.0
> Tagged_Information:
> ModelTiepointTag (2,3):
> 0 0 0
> 623250 2702250 0
> ModelPixelScaleTag (1,3):
> 50 50 0
> End_Of_Tags.
> Keyed_Information:
> GTModelTypeGeoKey (Short,1): ModelTypeProjected
> GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
> GTCitationGeoKey (Ascii,257): "IMAGINE GeoTIFF Support
> Copyright 1991 - 2005 by Leica Geosystems Geospatial Imaging, LLC.
> All Rights Reserved
> @(#)$RCSfile: egtf.c $ IMAGINE 9.0 $Revision: 10.0 $ $Date:
> 2005/07/26 15:10:00 EST $
> Projection Name = UTM
> Units = meters
> GeoTIFF Units = meters"
> GeogGeodeticDatumGeoKey (Short,1): Datum_WGS84
> GeogEllipsoidGeoKey (Short,1): Ellipse_WGS_84
> ProjectedCSTypeGeoKey (Short,1): PCS_WGS84_UTM_zone_39N
> PCSCitationGeoKey (Ascii,27): "Processed by Photosat LTD."
> ProjCoordTransGeoKey (Short,1): CT_TransverseMercator
> ProjLinearUnitsGeoKey (Short,1): Linear_Meter
> ProjNatOriginLongGeoKey (Double,1): 51
> ProjNatOriginLatGeoKey (Double,1): 0
> ProjFalseEastingGeoKey (Double,1): 500000
> ProjFalseNorthingGeoKey (Double,1): 0
> ProjScaleAtNatOriginGeoKey (Double,1): 0.9996
> End_Of_Keys.
> End_Of_Geotiff.
>
> PCS = 32639 (name unknown)
> Projection = 16039 ()
> Projection Method: CT_TransverseMercator
> ProjNatOriginLatGeoKey: 0.000000 ( 0d 0' 0.00"N)
> ProjNatOriginLongGeoKey: 51.000000 ( 51d 0' 0.00"E)
> ProjScaleAtNatOriginGeoKey: 0.999600
> ProjFalseEastingGeoKey: 500000.000000
> ProjFalseNorthingGeoKey: 0.000000
> GCS: 4326/WGS 84
> Datum: 6326/World Geodetic System 1984
> Ellipsoid: 7030/WGS 84 (6378137.00,6356752.31)
> Prime Meridian: 8901/Greenwich (0.000000/ 0d 0' 0.00"E)
> Projection Linear Units: 9001/metre (1.000000m)
>
> Corner Coordinates:
> Upper Left ( 623250.000,2702250.000)
> Lower Left ( 623250.000,2511800.000)
> Upper Right ( 847450.000,2702250.000)
> Lower Right ( 847450.000,2511800.000)
> Center ( 735350.000,2607025.000)
>
> When I load this image into a uDig map the CRS indicated is WGS84 with
> no projection.
> The coordinates reported in the map window are EN and not Lat Long.
>
> Is uDig attempting to reproject the image on the fly?
>
> Do our geotiff's need some further tag to be recognized properly?
>
> Any help would be appreciated,
>
> Thanks,
>
> Hugh
>
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel
