[gdal-dev] map info and projections from GeoTIFF file to create ENVI header

Dmitry Baryshnikov bishop.dev at gmail.com
Sun Jan 17 09:56:54 PST 2016 

I downloaded this scene from earthexplorer, and everything is fine:

$ gdalinfo LC80080472013174LGN00_B1.TIF
Driver: GTiff/GeoTIFF
Files: LC80080472013174LGN00_B1.TIF
        ./LC80080472013174LGN00_MTL.txt
Size is 7571, 7411
Coordinate System is:
PROJCS["WGS 84 / UTM zone 19N",
     GEOGCS["WGS 84",
         DATUM["WGS_1984",
             SPHEROID["WGS 84",6378137,298.257223563,
                 AUTHORITY["EPSG","7030"]],
             AUTHORITY["EPSG","6326"]],
         PRIMEM["Greenwich",0,
             AUTHORITY["EPSG","8901"]],
         UNIT["degree",0.0174532925199433,
             AUTHORITY["EPSG","9122"]],
         AUTHORITY["EPSG","4326"]],
     PROJECTION["Transverse_Mercator"],
     PARAMETER["latitude_of_origin",0],
     PARAMETER["central_meridian",-69],
     PARAMETER["scale_factor",0.9996],
     PARAMETER["false_easting",500000],
     PARAMETER["false_northing",0],
     UNIT["metre",1,
         AUTHORITY["EPSG","9001"]],
     AXIS["Easting",EAST],
     AXIS["Northing",NORTH],
     AUTHORITY["EPSG","32619"]]
Origin = (145185.000000000000000,2189715.000000000000000)
Pixel Size = (30.000000000000000,-30.000000000000000)
Metadata:
   AREA_OR_POINT=Point
   METADATATYPE=ODL
Image Structure Metadata:
   INTERLEAVE=BAND
Corner Coordinates:
Upper Left  (  145185.000, 2189715.000) ( 72d23' 7.97"W, 19d46'16.43"N)
Lower Left  (  145185.000, 1967385.000) ( 72d20'44.51"W, 17d45'55.15"N)
Upper Right (  372315.000, 2189715.000) ( 70d13' 8.50"W, 19d47'56.92"N)
Lower Right (  372315.000, 1967385.000) ( 70d12'16.74"W, 17d47'24.74"N)
Center      (  258750.000, 2078550.000) ( 71d17'19.50"W, 18d47' 4.68"N)
Band 1 Block=7571x1 Type=UInt16, ColorInterp=Gray

$ gdalinfo --version
GDAL 2.1.0dev, released 2015/99/99

What is your gdal version? Maybe the Landsat geotiff was modified from 
some software?

Best regards,
     Dmitry

17.01.2016 20:15, Nevzat Guler пишет:
> Thank you Dmitry,
> What is the best way to extract the information we got using gdalinfo.exe by using GDAL classes, within a C++ code? As I mentioned, I am using GetGeoTransform and GetProjectionRef() but the results miss many of the information (specifically the map info elements as I explained in the previous email).
>
> On another note, I actually get a different output from gdalinfo.exe using my file (please see the printed result below). I got the geotiff file from my colleague. When I open the file with ENVI, I get all the information, including GEOGCS information.
>
> Can it be that my file is just corrupted and that's why I don't get all the information from GetGeoTransform and GetProjectionRef()? But then how would ENVI is able to extract this information if it were not in the file?
>
> Thanks again, - Nevzat
>
> C:\Cubes\Landsat\LC80080472013174LGN00>gdalinfo LC80080472013174LGN00_B1.TIF
> Driver: GTiff/GeoTIFF
> Files: LC80080472013174LGN00_B1.TIF
>         .\LC80080472013174LGN00_MTL.txt
> Size is 7571, 7411
> Coordinate System is:
> PROJCS["unnamed",
>      PROJECTION["Transverse_Mercator"],
>      PARAMETER["latitude_of_origin",0],
>      PARAMETER["central_meridian",-69],
>      PARAMETER["scale_factor",0.9996],
>      PARAMETER["false_easting",500000],
>      PARAMETER["false_northing",0],
>      UNIT["metre",1,
>          AUTHORITY["EPSG","9001"]]]
> Origin = (145185.000000000000000,2189715.000000000000000)
> Pixel Size = (30.000000000000000,-30.000000000000000)
> Metadata:
>    AREA_OR_POINT=Point
>    METADATATYPE=ODL
> Image Structure Metadata:
>    INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left  (  145185.000, 2189715.000)
> Lower Left  (  145185.000, 1967385.000)
> Upper Right (  372315.000, 2189715.000)
> Lower Right (  372315.000, 1967385.000)
> Center      (  258750.000, 2078550.000)
> Band 1 Block=7571x1 Type=UInt16, ColorInterp=Gray
>
> -----Original Message-----
> From: gdal-dev [mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Dmitry Baryshnikov
> Sent: Sunday, January 17, 2016 6:57 AM
> To: gdal-dev at lists.osgeo.org
> Subject: Re: [gdal-dev] map info and projections from GeoTIFF file to create ENVI header
>
> Hi Nevzat,
>
> The landsat geotiff already have CRS embeded in file
>
> $ gdalinfo LC80150362013097LGN03_B1.TIF
> Driver: GTiff/GeoTIFF
> Files: LC80150362013097LGN03_B1.TIF
>          ./LC80150362013097LGN03_MTL.txt
> Size is 7281, 7261
> Coordinate System is:
> PROJCS["WGS 84 / UTM zone 17N",
>       GEOGCS["WGS 84",
>           DATUM["WGS_1984",
>               SPHEROID["WGS 84",6378137,298.257223563,
>                   AUTHORITY["EPSG","7030"]],
>               AUTHORITY["EPSG","6326"]],
>           PRIMEM["Greenwich",0,
>               AUTHORITY["EPSG","8901"]],
>           UNIT["degree",0.0174532925199433,
>               AUTHORITY["EPSG","9122"]],
>           AUTHORITY["EPSG","4326"]],
>       PROJECTION["Transverse_Mercator"],
>       PARAMETER["latitude_of_origin",0],
>       PARAMETER["central_meridian",-81],
>       PARAMETER["scale_factor",0.9996],
>       PARAMETER["false_easting",500000],
>       PARAMETER["false_northing",0],
>       UNIT["metre",1,
>           AUTHORITY["EPSG","9001"]],
>       AXIS["Easting",EAST],
>       AXIS["Northing",NORTH],
>       AUTHORITY["EPSG","32617"]]
> Origin = (706185.000000000000000,3943515.000000000000000)
> Pixel Size = (30.000000000000000,-30.000000000000000)
> Metadata:
>     AREA_OR_POINT=Point
>     METADATATYPE=ODL
> Image Structure Metadata:
>     INTERLEAVE=BAND
> Corner Coordinates:
> Upper Left  (  706185.000, 3943515.000) ( 78d43'24.74"W, 35d36'50.15"N) Lower Left  (  706185.000, 3725685.000) ( 78d46'35.65"W, 33d39' 3.82"N) Upper Right (  924615.000, 3943515.000) ( 76d19' 2.05"W, 35d32'39.74"N) Lower Right (  924615.000, 3725685.000) ( 76d25'33.46"W, 33d35'10.99"N)
> Center      (  815400.000, 3834600.000) ( 77d33'38.95"W, 34d36'17.35"N)
> Band 1 Block=7281x1 Type=UInt16, ColorInterp=Gray
>
> And this is right CRS.
> Where do you get you geotiff?
>
> Best regards,
>       Dmitry
>
> 17.01.2016 03:41, Nevzat Guler пишет:
>> Dear experts,
>>
>> I am reading LANDSAT GeoTIFF files and combining bands to create and
>> ENVI cube.
>> I am using GDAL to read the GeoTIFF file, and my own custom cube
>> writer to write the ENVI style cube. Transferring the map information
>> proved to be a bit convoluted. I seek your help to figure out this.
>>
>> My first problem is to access map info from GeoTIFF file. The map info
>> includes:
>>
>> map info = {UTM, 1.000, 1.000, 145185.000, 2189715.000,
>> 3.0000000000e+001, 3.0000000000e+001, 19, North, WGS-84, units=Meters}
>>
>> I am able to get the location (x,y), and pixel size (x,y) from :
>> double adfGeoTransform[6];
>> srcDS->GetGeoTransform(adfGeoTransform);
>>
>> But, I could not find any way to get the other variables in the
>> string: UTM, pixel tie points, Unit and DATUM. Is there any way to get them?
>>
>> Finally, for the Coordinate System String, GDAL gives me:
>>
>> PROJCS["unnamed",PROJECTION["Transverse_Mercator"],PARAMETER["latitude
>> _of_or
>> igin
>> ",0],PARAMETER["central_meridian",-69],PARAMETER["scale_factor",0.9996
>> ],PARA
>> METE
>> R["false_easting",500000],PARAMETER["false_northing",0],UNIT["Meter",1
>> ]]
>>
>> But I should actually get
>>
>> PROJCS["UTM_Zone_19N",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS
>> 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],TOWGS84[0,0,0,0,0,
>> 0,0],A
>> UTHO
>> RITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UN
>> IT["de
>> gree
>> ",0.0174532925199433,AUTHORITY["EPSG","9108"]],AUTHORITY["EPSG","4326"
>> ]],PRO
>> JECT
>> ION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER
>> ["cent
>> ral_
>> meridian",-69],PARAMETER["scale_factor",0.9996],PARAMETER["false_easti
>> ng",50
>> 0000
>> ],PARAMETER["false_northing",0],UNIT["Meter",1]]
>>
>> GDAL gives me PROJCS, "unnamed". And no GEOGCS information is given.
>> I am able to get the coordinate system properties by using the
>> following commands but I first need to set few things to use exportToWTK.
>>
>>>>         OGRSpatialReference oSRS;
>>>>         char *pszWKT = NULL;
>>>>         oSRS.SetProjCS("UTM_Zone_19N");
>>>>         oSRS.SetWellKnownGeogCS("WGS84");
>>>>         oSRS.SetUTM(19, TRUE);
>>>>         oSRS.SetWellKnownGeogCS("WGS84");
>>>>         oSRS.exportToWkt(&pszWKT);
>>>>         printf("%s\n", pszWKT);
>> However, this requires me to set SetProjCS, SetWellKnownGeogCS and
>> SetUTM first. I don't know these before I read the file. Is there any
>> way to get them from the file so that I don't need prior knowledge to
>> create the header. When I pull the GeoTIFF file into ENVI, all these
>> information is already there. If this list is only or development
>> purposes, please let me know if there is any other email list that can
>> give me guidance on this quest.
>>
>> I appreciate your help and suggestions.
>> Best regards,
>> - Nevzat
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
>

More information about the gdal-dev mailing list