[Geoserver-users] Geotiff image appears black on map preview

GeoServer GeoServer User
1

Hi,

I have a raster tiff image (from ENVI) with .tfw file.
I used the gdal_translate command to translate the tiff image to geotiff, where the results are below:

The gdalinfo of my raster tiff file:

Driver: GTiff/GeoTIFF
Size is 5024, 1719
Coordinate System is:
PROJCS[“unnamed”,
GEOGCS[“unnamed”,
DATUM[“unknown”,
SPHEROID[“unretrievable - using WGS84”,6378137,298.257223563]],
PRIMEM[“Greenwich”,0],
UNIT[“degree”,0.0174532925199433],
AUTHORITY[“EPSG”,“0”]],
PROJECTION[“Transverse_Mercator”],
PARAMETER[“latitude_of_origin”,0],
PARAMETER[“central_meridian”,-51],
PARAMETER[“scale_factor”,0.9996],
PARAMETER[“false_easting”,500000],
PARAMETER[“false_northing”,10000000],
UNIT[“metre”,1,
AUTHORITY[“EPSG”,“9001”]]]
Origin = (444163.200000000011642,6772635.599999999627471)
Pixel Size = (0.600000000000000,-0.600000000000000)
Metadata:
AREA_OR_POINT=Area
TIFFTAG_XRESOLUTION=100
TIFFTAG_YRESOLUTION=100
Corner Coordinates:
Upper Left ( 444163.200, 6772635.600) ( 51d34’27.23"W, 29d10’25.24"S)
Lower Left ( 444163.200, 6771604.200) ( 51d34’27.42"W, 29d10’58.76"S)
Upper Right ( 447177.600, 6772635.600) ( 51d32’35.63"W, 29d10’25.71"S)
Lower Right ( 447177.600, 6771604.200) ( 51d32’35.81"W, 29d10’59.22"S)
Center ( 445670.400, 6772119.900) ( 51d33’31.52"W, 29d10’42.24"S)
Band 1 Block=5024x1 Type=UInt16, ColorInterp=Red
Band 2 Block=5024x1 Type=UInt16, ColorInterp=Green
Band 3 Block=5024x1 Type=UInt16, ColorInterp=Blue

The gdalinfo of my geotiff file:

Driver: GTiff/GeoTIFF
Size is 5024, 1719
Coordinate System is:
PROJCS[“SAD69 / UTM zone 22S”,
GEOGCS[“SAD69”,
DATUM[“South_American_Datum_1969”,
SPHEROID[“GRS 1967 (SAD69)”,6378160,298.2500000000049,
AUTHORITY[“EPSG”,“7050”]],
AUTHORITY[“EPSG”,“6618”]],
PRIMEM[“Greenwich”,0],
UNIT[“degree”,0.0174532925199433],
AUTHORITY[“EPSG”,“4618”]],
PROJECTION[“Transverse_Mercator”],
PARAMETER[“latitude_of_origin”,0],
PARAMETER[“central_meridian”,-51],
PARAMETER[“scale_factor”,0.9996],
PARAMETER[“false_easting”,500000],
PARAMETER[“false_northing”,10000000],
UNIT[“metre”,1,
AUTHORITY[“EPSG”,“9001”]],
AUTHORITY[“EPSG”,“29192”]]
Origin = (444163.200000000011642,6772635.599999999627471)
Pixel Size = (0.600000000000000,-0.600000000000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
Corner Coordinates:
Upper Left ( 444163.200, 6772635.600) ( 51d34’27.22"W, 29d10’24.88"S)
Lower Left ( 444163.200, 6771604.200) ( 51d34’27.41"W, 29d10’58.39"S)
Upper Right ( 447177.600, 6772635.600) ( 51d32’35.63"W, 29d10’25.35"S)
Lower Right ( 447177.600, 6771604.200) ( 51d32’35.80"W, 29d10’58.86"S)
Center ( 445670.400, 6772119.900) ( 51d33’31.51"W, 29d10’41.87"S)
Band 1 Block=256x256 Type=UInt16, ColorInterp=Gray
Band 2 Block=256x256 Type=UInt16, ColorInterp=Undefined
Band 3 Block=256x256 Type=UInt16, ColorInterp=Undefined

I created a new coverage store, with the option “Tagged Image File Format with Geographic Information” and style “raster”. But on map preview the image seems have a some problem, because it appears all black.

Tanks,

–
Claudiomir G. Zanchetti (Caio)
Sun Certified Programmer for Java SE 5.0 - SUN272515

2

Ciao Claudio,
the fact that your geotiff is "black" does not represent a problem per-se.
I suspect that your initial image has a dynamic which is very
compressed towards 0 hence, after the conversion the image looks very
dark.

Do you see any error in the errors in the log? Can you make the image
available for testing?

Simone.

-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Owner - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy

phone: +39 0584983027
fax: +39 0584983027
mob: +39 333 8128928

http://www.geo-solutions.it
http://simboss.blogspot.com/
http://www.linkedin.com/in/simonegiannecchini

-------------------------------------------------------

On Mon, Jan 12, 2009 at 3:16 AM, Claudiomir Zanchetti (Caio)
<caio.zanchetti@anonymised.com> wrote:

Hi,

I have a raster tiff image (from ENVI) with .tfw file.
I used the gdal_translate command to translate the tiff image to geotiff,
where the results are below:

The gdalinfo of my raster tiff file:

Driver: GTiff/GeoTIFF
Size is 5024, 1719
Coordinate System is:
PROJCS["unnamed",
    GEOGCS["unnamed",
        DATUM["unknown",
            SPHEROID["unretrievable - using WGS84",6378137,298.257223563]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","0"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-51],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",10000000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]]]
Origin = (444163.200000000011642,6772635.599999999627471)
Pixel Size = (0.600000000000000,-0.600000000000000)
Metadata:
  AREA_OR_POINT=Area
  TIFFTAG_XRESOLUTION=100
  TIFFTAG_YRESOLUTION=100
Corner Coordinates:
Upper Left ( 444163.200, 6772635.600) ( 51d34'27.23"W, 29d10'25.24"S)
Lower Left ( 444163.200, 6771604.200) ( 51d34'27.42"W, 29d10'58.76"S)
Upper Right ( 447177.600, 6772635.600) ( 51d32'35.63"W, 29d10'25.71"S)
Lower Right ( 447177.600, 6771604.200) ( 51d32'35.81"W, 29d10'59.22"S)
Center ( 445670.400, 6772119.900) ( 51d33'31.52"W, 29d10'42.24"S)
Band 1 Block=5024x1 Type=UInt16, ColorInterp=Red
Band 2 Block=5024x1 Type=UInt16, ColorInterp=Green
Band 3 Block=5024x1 Type=UInt16, ColorInterp=Blue

The gdalinfo of my geotiff file:

Driver: GTiff/GeoTIFF
Size is 5024, 1719
Coordinate System is:
PROJCS["SAD69 / UTM zone 22S",
    GEOGCS["SAD69",
        DATUM["South_American_Datum_1969",
            SPHEROID["GRS 1967 (SAD69)",6378160,298.2500000000049,
                AUTHORITY["EPSG","7050"]],
            AUTHORITY["EPSG","6618"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4618"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-51],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",10000000],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","29192"]]
Origin = (444163.200000000011642,6772635.599999999627471)
Pixel Size = (0.600000000000000,-0.600000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=LZW
Corner Coordinates:
Upper Left ( 444163.200, 6772635.600) ( 51d34'27.22"W, 29d10'24.88"S)
Lower Left ( 444163.200, 6771604.200) ( 51d34'27.41"W, 29d10'58.39"S)
Upper Right ( 447177.600, 6772635.600) ( 51d32'35.63"W, 29d10'25.35"S)
Lower Right ( 447177.600, 6771604.200) ( 51d32'35.80"W, 29d10'58.86"S)
Center ( 445670.400, 6772119.900) ( 51d33'31.51"W, 29d10'41.87"S)
Band 1 Block=256x256 Type=UInt16, ColorInterp=Gray
Band 2 Block=256x256 Type=UInt16, ColorInterp=Undefined
Band 3 Block=256x256 Type=UInt16, ColorInterp=Undefined

I created a new coverage store, with the option "Tagged Image File Format
with Geographic Information" and style "raster". But on map preview the
image seems have a some problem, because it appears all black.

Tanks,

--
Claudiomir G. Zanchetti (Caio)
Sun Certified Programmer for Java SE 5.0 - SUN272515

------------------------------------------------------------------------------
Check out the new SourceForge.net Marketplace.
It is the best place to buy or sell services for
just about anything Open Source.
http://p.sf.net/sfu/Xq1LFB
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users