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FSXA Gdalwarp how to?

W

WorldFly

Messages
10
Country
germany
Hi,

I tried to convert my Geotiff to the Fsx readable Format and the result is i get some black Borders as you can see below.
So my qestion is what im doing wrong?

here is the Command i used:

Code: 
gdalwarp -of GTiff -co "INTERLEAVE=PIXEL" -s_srs EPSG:26904 -t_srs "+proj=latlong +datum=WGS84" hihono6090e23560n.tif hihono6090e23560n_wgs84.tif

And so comes it out:
[img=http://www.abload.de/thumb/hihono6090e23560n_wgsq7joh.jpg]

As you can see there black Triangles at the border.

And the listgeo information:

Code: 
D:\Image_Data>gdalinfo "D:\Image_Data\hihono6090e23560n.tif"
Driver: GTiff/GeoTIFF
Files: D:\Image_Data\hihono6090e23560n.tif
Size is 10000, 10000
Coordinate System is:
PROJCS["NAD83 / UTM zone 4N",
    GEOGCS["NAD83",
        DATUM["North_American_Datum_1983",
            SPHEROID["GRS 1980",6378137,298.2572220960423,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","6269"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4269"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-159],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","26904"]]
Origin = (609000.000000000000000,2357500.050000000300000)
Pixel Size = (0.150000000000000,-0.150000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (  609000.000, 2357500.050) (157d56'56.47"W, 21d18'58.11"N)
Lower Left  (  609000.000, 2356000.050) (157d56'56.82"W, 21d18'9.33"N)
Upper Right (  610500.000, 2357500.050) (157d56'4.41"W, 21d18'57.78"N)
Lower Right (  610500.000, 2356000.050) (157d56'4.76"W, 21d18'9.00"N)
Center      (  609750.000, 2356750.050) (157d56'30.62"W, 21d18'33.56"N)
Band 1 Block=10000x1 Type=Byte, ColorInterp=Red
Band 2 Block=10000x1 Type=Byte, ColorInterp=Green
Band 3 Block=10000x1 Type=Byte, ColorInterp=Blue

I hope someone can help me out.


Best regards Benjamin
 
Hi,

Such black borders is normal when changing the projection. In your inf file you can specify black as the null value and then they should be ignored.
 
arno said:
Hi,

Such black borders is normal when changing the projection. In your inf file you can specify black as the null value and then they should be ignored.
Click to expand...

Thanks for the Reply Arno, that solved the Problem but i have a Question.

Is it possible to only transform the Corner coordinates so that the image is still quadratic and let resample warping the Image?


Best regards Benjamin
 
Hi,

No, that is not possible. Resample requires the image to use WGS84. So that each side of the image is a certain lat or lon value.
 
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