| Re: GeoTiff- grid [message #58123] |
Tue, 22 January 2008 14:40  |
robinson.inj
Messages: 32
Registered: August 2007
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Member |
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On Jan 22, 4:23 pm, David Fanning <n...@dfanning.com> wrote:
> robinson....@gmail.com writes:
>> David, I followed your examples but still have problems. In the uv
>> space my corners IDL and ENVI aggred
>> UpperLeftCoordinate:(-167346.0185E, 3677892.5566N)
>> LowerRightCoordinate:(1222128.8184E,2983386.7945N)
>> However in the lon/lat space i got:
>> IDL: UpperLeftCoordinate: (-98.555279E, 45.411655N)
>> LowerRightCoordinate: ( -81.568627E,51.346972N)
>> ENVI: UpperLeftCoordinate: (-98.09914722E, 33.30501389N)
>> LowerRightCoordinate:(-84.82142500E, 27.55810278N)
>> My image has 3000 col x 1500 lin. The pix resolution is 463.3127
>> meters.
>
>> mercatorMap =3D MAP_PROJ_INIT('Mercator', $
>> DATUM=3D8, $ ; WGS84
>> CENTER_LATITUDE=3D20.000, $
>> CENTER_LONGITUDE=3D-96.5000)
>
>> I tried different things but in all cases idl and envi did not match,
>> and I do not have any clue where is my error.
>
>> Any suggestion is welcome.
>
> Why don't you post the listgeo output, so we can see what it
> thinks the map projection is suppose to be.
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")- Hide quoted text -
>
> - Show quoted text -
I hope it helps
Geotiff_Information:
Version: 1
Key_Revision: 1.0
Tagged_Information:
ModelTiepointTag (2,3):
0 0 0
-167346.019 3677892.56 0
ModelPixelScaleTag (1,3):
463.312717 463.312717 0
End_Of_Tags.
Keyed_Information:
GTModelTypeGeoKey (Short,1): ModelTypeProjected
GTRasterTypeGeoKey (Short,1): RasterPixelIsArea
GeographicTypeGeoKey (Short,1): GCS_WGS_84
GeogLinearUnitsGeoKey (Short,1): Linear_Meter
GeogAngularUnitsGeoKey (Short,1): Angular_Degree
ProjectedCSTypeGeoKey (Short,1): User-Defined
ProjectionGeoKey (Short,1): User-Defined
ProjCoordTransGeoKey (Short,1): CT_Mercator
ProjLinearUnitsGeoKey (Short,1): Linear_Meter
ProjFalseEastingGeoKey (Double,1): 0
ProjFalseNorthingGeoKey (Double,1): 0
ProjCenterLongGeoKey (Double,1): -96.5
ProjCenterLatGeoKey (Double,1): 20
End_Of_Keys.
End_Of_Geotiff.
Projection Method: CT_Mercator
ProjNatOriginLatGeoKey: 20.000000 ( 20d 0' 0.00"N)
ProjNatOriginLongGeoKey: -96.500000 ( 96d30' 0.00"W)
ProjScaleAtNatOriginGeoKey: 1.000000
ProjFalseEastingGeoKey: 0.000000 m
ProjFalseNorthingGeoKey: 0.000000 m
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 ( -167346.019, 3677892.557)
Lower Left ( -167346.019, 2982923.482)
Upper Right ( 1222592.131, 3677892.557)
Lower Right ( 1222592.131, 2982923.482)
Center ( 527623.056, 3330408.019)
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